Zeitschriftenartikel zum Thema „Sorbent material“
Um die anderen Arten von Veröffentlichungen zu diesem Thema anzuzeigen, folgen Sie diesem Link: Sorbent material.
Geben Sie eine Quelle nach APA, MLA, Chicago, Harvard und anderen Zitierweisen an
Machen Sie sich mit Top-50 Zeitschriftenartikel für die Forschung zum Thema "Sorbent material" bekannt.
Neben jedem Werk im Literaturverzeichnis ist die Option "Zur Bibliographie hinzufügen" verfügbar. Nutzen Sie sie, wird Ihre bibliographische Angabe des gewählten Werkes nach der nötigen Zitierweise (APA, MLA, Harvard, Chicago, Vancouver usw.) automatisch gestaltet.
Sie können auch den vollen Text der wissenschaftlichen Publikation im PDF-Format herunterladen und eine Online-Annotation der Arbeit lesen, wenn die relevanten Parameter in den Metadaten verfügbar sind.
Sehen Sie die Zeitschriftenartikel für verschiedene Spezialgebieten durch und erstellen Sie Ihre Bibliographie auf korrekte Weise.
1
Budriūtė, Eglė, Vaidotas Vaišis und Donatas Mikulskis. „INVESTIGATION OF HEMP WATER SORPTION CAPACITY / NATŪRALIŲ ORGANINIŲ KANAPIŲ SPALIŲ SORBENTO NAFTOS PRODUKTAMS ŠALINTI TYRIMAS“. Mokslas – Lietuvos ateitis 8, Nr. 4 (24.10.2016): 397–402. http://dx.doi.org/10.3846/mla.2016.947.
Annotation:
Effective clean-up of oil spills due to their negative environmental and economic impact is of capital importance. Clean-up of oil by sorption is considered one of the most desirable choices, because oil can be completely removed without causing any secondary pollution. Natural organic sorbents had been investigated and developed to control oil products‘ spills. Plant biomass is a renewable resource which can be converted into various materials and energy. Hemp (USO-31), as a textile industry waste, was used as an oil product sorbent material. The present study examines hemp sorption capacity of water using different fractions of hemp raw material to be used in oil/water mixtures. The experimental research revealed that water sorption capacity depends on fraction size and sorption time. The results of water sorption capacity of 2.5 and 5.0 mm after 1440 min were 4.74 and 4.67 g water/g dry sorbent, respectively. Labai svarbu efektyviai likviduoti išsiliejusius naftos produktus dėl jų neigiamo poveikio aplinkai ir ekonomikai. Naftos produktų valymo metodas pasitelkiant sorbentus yra laikomas vienu iš geriausių pasirinkimų, nes produktai yra absorbuojami sorbentų, nesukeliant jokios antrinės taršos. Natūralūs organiniai sorbentai buvo tiriami ir tobulinami, siekiant kontroliuoti naftos produktų išsiliejimus. Augalų biomasė yra atsinaujinantis išteklis, kuris gali būti naudojamas įvairioms medžiagoms ir energijai išgauti. Kanapių spaliai (USO-31), tekstilės pramonės atlieka, buvo tiriami kaip naftos produktų sorbentas. Buvo išnagrinėta kanapių vandens sorbcija naudojant įvairias šios medžiagos frakcijas. Eksperimentinis tyrimas parodė, kad vandens sorbcija priklauso nuo frakcijos dydžio ir sorbcijos laiko. Tyrimų metu buvo nustatyta vandens sorbcijos geba – 4,74 ir 4,67 g vandens/g sauso sorbento 2,5 ir 5,0 mm pavyzdžiams po 1440 min atitinkamai.
2
Dzyazko, Yuliya, und Yevhen Kolomiiets. „SORBENTS BASED ON NON-CARBONIZED VEGETABLE RAW MATERIALS“. Ukrainian Chemistry Journal 88, Nr. 5 (24.06.2022): 37–68. http://dx.doi.org/10.33609/2708-129x.88.05.2022.37-68.
Annotation:
A literature analysis was conducted with sources that describe non-carbonized plant materials (in particular, cellulose from various plants and its derivatives) as sorbents for toxic ions (Cr3+, Cd2+, Cu2+, Pb2+, Ni2+, etc.) and organic compounds, including oil products. The advantage of plant-based non-carbonized raw materials and sorption materials based on them is the ease of obtaining them from cheap and available plant materials (often from agricultural waste), while the absorbed oil products can be separated from such sorbents by pressing, and the sorbents can be reused. The disadvantage is a different composition, depending on the region of growth. The use of inexpensive materials as a matrix for a composite sorbent makes it possible to widely use such material for post-cleaning and/or as the main method of cleaning aqueous solutions for consumer needs. In particular, the addition of finely dispersed inorganic compounds (in particular, graphene oxides) and organic modifiers to non-carbonized plant material for functionalization of its surface was analyzed.
Surface modification gives the sorbent hydrophobic properties and/or results in a composite sorbent having a higher sorption capacity (compared to unmodified sorbents) in relation to target pollutants. The study authors suggest using fatty acids, zinc oxide, polysiloxanes, trimethylamine and other compounds as modifiers. The impact of the porous structure of cellulose on its properties as an element of a composite sorbent is also considered. The presence of functional groups in plant materials, in particular in biopolymers, allows them to be used as cheap anion exchangers. To increase the number of ion-exchange groups, the authors of the research suggest functionalizing the surface, which leads to an increase in the number, for example, of sulphatic groups, which in turn increases the ion-exchange capacity of such an ion-exchange material or a composite based on it.
When using modified hydrophobic biosorbents to remove oil and oil products from water surfaces, it is possible to regenerate the sorbents mechanically, i.e. without reagents. This provides the possibility of multiple use of biosorbents on one side and the possible complete extraction of valuable products sorbed hydrocarbons.
3
Kostoev, R. K., D. S. Tochiev, E. I. Nilkho, Z. N. Sultigova, R. D. Archakova, B. A. Temirkhanov und L. Ya Uzhakhova. „Application of the mercury porosimetry method in the analysis of sorption materials“. Fine Chemical Technologies 15, Nr. 1 (21.03.2020): 76–83. http://dx.doi.org/10.32362/2410-6593-2020-15-1-76-83.
Annotation:
Objectives. This study aims to establish the available porosity of a sorbent based on carbonized rice husk and investigate its sorption properties for oil and oil products.Methods. A rice-husk-based sorbent carbonized at 400°С for 30 min was selected as the subject. The porosity of this sorbent is analyzed with the help of mercury porosimeters, the Pascal 140 EVO and Pascal 240 EVO. The sorption properties of the sorbent are also studied when cleaning water containing oil and oil products.Results. The test sample is a bulk porous material with a pore volume of 0.015 cm/g; porosity higher than 15% was found, and the pore size distribution is shown. Studies were conducted on the sorption of oil and oil products as well as the possibility of using the aforementioned sorbent as a filtering material in the purification of water containing oil products. We investigated the sorption processes under dynamic and static conditions. The methodology for measuring the porous structure of solid materials on the mercury porosimeter, Pascal 140 EVO, was examined. The texture characteristics of the sorbent’s porous structure were determined, which is primarily the total volume of pores, the values of the specific surface area, and the volume of the microspores and mesopores.Conclusions. The materials studied can be used as sorbents with a developed porous structure for purification of water with dissolved and emulsified petroleum products.
4
Trusova, M. M., T. N. Kamedko und O. V. Pavlova. „PROSPECTS FOR USING CHITOSAN AS A STABILIZER IN COLLOIDAL OUTSTANDING“. Food Industry: Science and Technology 14, Nr. 4(54) (20.12.2021): 97–102. http://dx.doi.org/10.47612/2073-4794-2021-14-4(54)-97-102.
Annotation:
This article discusses the main representatives of the class of polyphenols, as well as the causes of the formation of colloidal opacities. The main auxiliary materials used in the technology of fermentation beverages are presented. The studies were carried out on model solutions, such sorbents as chitosan, diatomaceous earth and a combined sorbent based on them were studied. The maximum sorption of tannin by chitosan occurred already at 30 minutes of exposure and amounted to 242.5 mg of tannin per 1 g of chitosan. The maximum sorption of tannin by diatomaceous earth was 58.4 mg per 1 g of sorbent. The combined material based on diatomaceous earth and chitosan absorbs 147.2 mg of tannin per 1 g of sorbent. Chitosan and the combined sorbent have the best sorbing properties in relation to polyphenols. Research in this area will solve the problem of colloidal turbidity, increase the shelf life and sale of finished fermented drinks and beer.
5
Shachneva, Evgeniya Yu. „OBTAINING SORBENTS BASED ON NATURAL MINERAL RAW MATERIALS“. Journal of the Belarusian State University. Ecology., Nr. 2 (25.06.2022): 66–74. http://dx.doi.org/10.46646/2521-683x/2022-2-66-74.
Annotation:
The presented material shows the results of studies of sorbents obtained on the basis of natural mineral raw materials -the flask of the Astrakhan region. The role of technogenic impact on the process of environmental pollution is shown. The methods of obtaining new sorption materials based on natural formations, the main component of which is flask, which is a sedimentary siliceous rock, are considered. The structure of this natural mineral is described, consisting of 90 % fine-grained amorphous aqueous silica with admixtures of clay matter, carbonates, silicon organic residues, quartz, feldspar, volcanic glass, etc. The studied component is close to trepel in its chemical and mineral composition, differing from it in greater density. The main adsorption-structural and physico-chemical characteristics of the sorbents under consideration are investigated. The values of the physicochemical parameters of the obtained materials, such as the porosity of the sorbent for acetone, the total pore volume of the sorbent for water, the moisture content in the sorbent and the pH of the aqueous suspension of the sorbent, are calculated. Their adsorption-structural characteristics, such as the specific surface area of the sorbent and bulk density, are determined. The presented material describes the nature of the surface and the structure of the flask as a natural mineral raw material underlying the methods of obtaining the sorbents in question. This suggests possible sorption properties of the described products. Graphical diagrams of the structure of clay minerals as layered crystal structures are presented, the atomic lattice of the substance of which combines two main structural elements. A graphical diagram of the described structural elements is presented. In the course of the work, the scheme of the graphic representation of the montmorillonite structure is considered, and the mineral and chemical composition of the flask of the Astrakhan region is characterized. All of the above allows us to make an assumption about the possibility of their use as a sorbent, as well as a base material for the creation of new sorption materials. The obtained results of the work can be used to remove toxicants from various media, minimize production costs, and increase the efficiency of adsorbents in the processes of their long-term operation.
6
Sokol, Oleksandr, und Anna Ivanchenko. „PRODUCTION OF ACID-ACTIVATED SORBENTS FROM PLANT RAW MATERIALS AND THEIR TESTING FOR DYE REMOVAL FROM MODEL SOLUTIONS“. Collection of scholarly papers of Dniprovsk State Technical University (Technical Sciences) 1, Nr. 44 (06.06.2024): 169–82. http://dx.doi.org/10.31319/2519-2884.44.2024.22.
Annotation:
The study addresses the pressing issue of obtaining new sorbents from plant raw materials and their use for purifying water systems containing hazardous dyes. In the research, the method of chemical kiloton activation is applied to acquire new sorbents, and its advantages are outlined. Three samples of sorbents were obtained: a lignocellulosic sorbent based on walnut shell, which underwent no treatment with chemical reagents; the second sample was obtained by treating a lignocellulosic raw material with a 65 % solution of nitric acid (HNO3); the third sample - with a 65 % solution of acetic acid (CH₃COOH). The chemical activation of sorbents was carried out by the impregnation method in a water bath and rinsing with distilled water until reaching pH = 7—8, followed by gradual drying, initially at temperatures of 60—65 °C, then at 100—105 °C for 1—2 hours, and finally at 125—130 °C until a constant mass was achieved. At the last stage, the material was ground, selecting fractions of 10 mm in size. The prepared sorbents were tested for their efficiency in removing methyl orange dye from model solutions. A comparative analysis of sorbent samples regarding dye removal from model solutions was conducted. It was found that the use of chemically activated lignocellulosic sorbent with acetic acid (CH₃COOH) solution is more effective compared to nitric acid (HNO3) and non-activated sorbent. The optimal consumption rate of kiloton-activated lignocellulosic sorbent was found to be 1.5 g/dm3, with a purification efficiency of 80 %. The optimal contact time of the lignocellulosic sorbent with the adsorbate is 20 hours. The influence of temperature on the dye sorption process was investigated in the range from 291 to 303 K. Increasing the temperature to 303 K resulted in achieving a purification efficiency of 86 %.
7
Gorecki, Jerzy, Mariusz Macherzynski, Jacek Chmielowiec, Karel Borovec, Mateusz Wałeka, Yinyou Deng, Janusz Sarbinowski und Grzegorz Pasciak. „The Methods and Stands for Testing Fixed Sorbent and Sorbent Polymer Composite Materials for the Removal of Mercury from Flue Gases“. Energies 15, Nr. 23 (24.11.2022): 8891. http://dx.doi.org/10.3390/en15238891.
Annotation:
The most common methods of reducing mercury emissions are the use of fixed bed granular sorbents and sorbent injection. However, both of these methods have disadvantages, such as increasing the flow resistance or the need to remove the sorbent from flue gas, respectively. These disadvantages can be eliminated by using sorbents permanently bound to construction materials (fixed sorbent materials—FSMs) or mixed with construction materials (sorbent polymer composites—SPCs). The approach is unique in the world literature as well as the development of three stands and procedures enabling the testing of FSMs or SPC materials based on Tarflen as a construction material. In order to further tests of FSMs and SPCs, the system for laboratory tests and two systems for industrial tests are developed. These stands and procedures enable determination of the influence of: FSM or SPC module shapes, flue gas properties (e.g., composition, temperature, flow rate), and mercury concentration on the effectiveness of mercury removal by SPCs and FSMs. In this paper, the influence of module shapes, gas velocity, and temperature is particularly considered. In the final industrial tests, the FSM removes 99.5% Hg after 42 days and the SPC removes from 99.5% to 82.3% after 34 days.
8
Burlyaev, V. V., E. V. Burlyaeva, A. I. Nikolaev und B. V. Peshnev. „FUNCTIONAL MODELING OF CARBON SORBENTS SYNTHESIS CONTROL“. Fine Chemical Technologies 14, Nr. 1 (28.02.2019): 39–46. http://dx.doi.org/10.32362/2410-6593-2019-14-1-39-46.
Annotation:
The formalized model of carbon sorbent synthesis control based on the methodology for functional modeling is constructed. The correlations between the directions of use and the properties of carbon sorbents are revealed. The characteristics that are essential regardless of the direction of use of the sorbent, in particular, sorption properties and strength are identified. The technologies based on the gas-phase method of obtaining carbon material are considered, the analysis of individual stages of the process of obtaining carbon sorbents is carried out. The analysis of the influence of the technological parameters of the synthesis on the properties of sorbents is carried out. On the basis of the established relationships, a functional model has been built that provides a hierarchically ordered, structured, visual description of the management of carbon sorbent synthesis. The simulation is performed “from top to bottom” from the most general description to the detail. The resulting model is a set of interrelated graphical diagrams. At the initial stage, the synthesis of carbon sorbent is considered as a single process, the input parameters of which are hydrocarbon gas, the activating agent and the material form factor, the output - carbon sorbent, and the control parameters are the requirements for strength and sorption properties. Then the synthesis process is decomposed. The control processes (analysis of raw material properties and matrix selection), technological processes (raw material preparation) and mixed processes are distinguished as a result of decomposition. The model includes a consistent description of the technological parameters selection (temperature, gas flow and time) for both stages of the synthesis process. The model is the base for information support providing for the production of carbon sorbents with the required properties.
9
Dolgikh, V. T., V. A. Likholobov, V. V. Moroz, L. G. P'yanova, T. I. Dolgikh, A. V. Ershov und M. S. Drozdetskaya. „Prospects of the Use of New Carbon Sorbents with Antimicrobial Properties in the Intensive Care Medicine“. General Reanimatology 15, Nr. 1 (01.03.2019): 54–69. http://dx.doi.org/10.15360/1813-9779-2019-1-54-69.
Annotation:
The purpose is to study antibacterial and antimycotic properties of produced granular carbon sorbents. Material and methods. A VNIITU-1 carbon sorbent was used as a starting material, which was modified with polyvinylpyrrolidone and lactic and glycolic acids oligomers. Microbiological bench tests were carried out to determine the antibacterial and antimycotic activity of these granulated carbon hemosorbents. Antibacterial properties of sorbents were studied in relation to pathogenic and conditionally pathogenic microorganisms: Staphylococcus aureus, Pseudomonas aeroginosa, Klebsiella pneumonia, Escherichia coli, Streptococcus agalactiae as well as their mixtures: mixture No. 1 — S. aureus and E. coli; mixture No. 2 — S. aureus and P. aeruginosa. Results. Presented data demonstrate that the modified VNIITU-1 exhibits significant antibacterial and antimycotic activity against most of the studied microorganisms compared to original sorbent. Conclusion. Modified sorbents as antimicrobial and detoxifying drugs may further be employed in treatment of obstetrical-gynecological and surgical diseases. The carbon sorbents are promising materials for medicine, as they expand the potential of sorption therapy in clinical practice.
10
I V, Starostina, Nikitina A E, Kosukhin M M und Starostina Yu.L. „Efficient carbonaceous sorbent based on the waste sludge of oil extraction industry for purifying wastewater from petroleum products“. International Journal of Engineering & Technology 7, Nr. 2.23 (20.04.2018): 266. http://dx.doi.org/10.14419/ijet.v7i2.23.11928.
Annotation:
The opportunity to use the oil extraction industry waste kieselghur sludge as a raw stuff for carbonaceous sorbent for purifying wastewater from petroleum and petroleum products has been researched. It has been demonstrated that the thermal modification of the waste sludge results in oxidation of organic matter and the formation of a carbon layer on the surface of kieselghur (diatomite), as well as the formation of the obtained material’s porous structure. The maximum values of oil-absorption and petroleum-absorption of the carbonaceous sorbent samples, obtained at various temperatures of the initial waste product treatment, have been determined. The highest petroleum saturation (2 g/g) is observed in the first 5 minutes of the sorbent’s contact with the pollutant and is characteristic of the material, obtained at temperature 500°С. The highest oil saturation (3.6 g/g) is shown by the sorbent, obtained at temperature 450°С. This value was achieved after 30 minutes of the sorbent’s contact with oil. The efficiency of clarifying water-oil emulsion with the concentration 1.5 g/dm3 by using carbonaceous sorbents of various thermal pre-history has been determined. The highest degree of emulsion clarification – 91% was achieved at using the sorbent, obtained as a result of the waste sludge modification at temperature 450°С.
11
Shishkin, Andrei, Viktor Mironov, Vjaceslavs Lapkovskis, Juris Treijs und Aleksandr Korjakins. „Ferromagnetic Sorbents for Collection and Utilization of Oil Products“. Key Engineering Materials 604 (März 2014): 122–25. http://dx.doi.org/10.4028/www.scientific.net/kem.604.122.
Annotation:
This Current paper reports the research conducted at Riga Technical University and Rezekne Higher Education Institution on the development of sorbent material, which is made of closed hollow microspheres possesses ferromagnetic properties, with a large specific surface. A review and comparison of existing sorbents for oil products collection are presented. The manufacturing process of proposed sorbent are described. The structure and morphology of obtained composite sorbent are discussed. It was found that proposed sorbent allows an efficient and safe way for surface water cleaning contaminated by spilled oil products. In particular, it shows a storing effect on a thin oil film (1-2 mm). Adsorption capacity to motor oil is investigated and compared with other magnetic sorbents on metal powders base. Newly proposed sorbent demonstrates a significantly higher adsorption capacity comparing to iron powders. Sorbent saturated by spilled oil can be evacuated by means of magnetic (or electromagnetic) captures.
12
Pabiś-Mazgaj, Ewelina, Paweł Pichniarczyk, Agata Stempkowska und Tomasz Gawenda. „Possibility of Using Natural Zeolite Waste Granules Obtained by Pressure Agglomeration as a Sorbent for Petroleum Substances from Paved Surfaces“. Materials 15, Nr. 19 (03.10.2022): 6871. http://dx.doi.org/10.3390/ma15196871.
Annotation:
Increasing incidents of oil spills and dynamic development of civilization are driving the demand for sorbents. The production of the overwhelming majority of mineral sorbents involves the highly energy-consuming calcination process with CO2 emissions impacting the environment. Taking into account the environmental issues related to greenhouse gas emissions, we are in urgent need of green products and green technologies. The aim of this study was to investigate the possibility of using natural zeolite dust waste to produce oil sorbents in non-calcination technology. The main advantage of the proposed solution is reduction of greenhouse gas emissions and transformation of the waste material into green, useful product. The scope of the research covered the experimental tests for compaction of the zeolite material from Ukraine and Slovakia in a roller press with different type of binding agent and the performance tests for assessing the suitability of the produced agglomerates as a petroleum sorbent. In order to evaluate the agglomerates’ properties, textural-structural analysis (optical microscopy, SEM microscopy, and low-temperature N2 sorption), petroleum sorption (Westinghouse method), and physical-mechanical tests (resistance to gravitational drop, abrasion resistance) were carried out. Properties of the manufactured agglomerates were studied in comparison to commercial sorbent DAMSORB, commonly used in Poland. The test results showed that it is doable to produce the effective surface oil-spill sorbent from zeolite waste dust in a roller press by applying the relevant binding agent. The main finding of this study was that optimum feed composition for dry granulation that provides the granular sorbent with the best properties was established: 6% of C binder and moisture content within a narrow range of 20–20.6%. The C-1 sorbent achieved the highest and closely comparable to commercial sorbent parameters of petroleum sorption and drop strength, which are key points of this study. The absorption efficiency of petroleum substances for C-1 sorbent is 8% lower than that of a commercial sorbent, and resistance to gravitational drop is lower by only 3%. However, commercial sorbent exhibited better abrasion resistance compared to produced agglomerates, which is a compelling reason to continue the research in order to enhance the abrasion performance of the manufactured granules. The effectiveness of the dust consolidation method carried out was proved by textural parameters of the obtained zeolite-based sorbents. Specific surface area (SBET) of B-2 (SBET = 28.1 m2/g) and C-2 (SBET = 28.3 m2/g) sorbents was very similar to the commercial sorbent (SBET = 28.1 m2/g). Interestingly, all granules produced from clinoptilolite dust from Slovakia (A-2, B-2, C-2) achieved an increase of 19%, 33%, and 35%, respectively, in volume of mesopores, compared to the commercial sorbent. Moreover, the presented granulation technology favorably affected the size of the specific surface area as well as volume and surface area of mesopores in the case of obtained zeolite-based sorbent A-1 and B-1, compared with the starting raw material. Zeolite-based sorbent A-1 and B-1 achieved an increase of 17% and 18%, respectively, in specific area surface and an increase of 35% and 12%, respectively, in mesopores volume, compared with the raw material. Finally, the results of this investigation proved that it is possible to produce the efficient oil sorbent in a much more eco-friendly and green way, compared with that of the commercial sorbent.
13
Li, Yin Ming, und Fu Shen Zhang. „Characterization of a Sorbent Derived from Construction and Demolition Waste“. Advanced Materials Research 878 (Januar 2014): 199–205. http://dx.doi.org/10.4028/www.scientific.net/amr.878.199.
Annotation:
Construction and demolition waste (C&D) was employed as a raw material to synthesize sorbent by fusion-hydrothermal process in order to effectively use this type of waste material. The specific surface area and the cation exchange capacity (CEC) values of the sorbent were 308.2 m2 g-1 and 625.6 mmol/100 g-1, respectively. It was found that the sorbent was quite effective for ammonium ion due to the high CEC value. The sorbent possessed high PFOS sorption capacities after load with cationic surfactant (Cetyltrimethyl Ammonium Bromide, CTAB), the sorption capacities of CTAB-modified sorbents enhanced with the increase of CTAB loading amount. This study provides an effective way for the C&D waste utilization.
14
Erans, María, Theodor Beisheim, Vasilije Manovic, Michal Jeremias, Kumar Patchigolla, Heiko Dieter, Lunbo Duan und Edward J. Anthony. „Effect of SO2and steam on CO2capture performance of biomass-templated calcium aluminate pellets“. Faraday Discussions 192 (2016): 97–111. http://dx.doi.org/10.1039/c6fd00027d.
Annotation:
Four types of synthetic sorbents were developed for high-temperature post-combustion calcium looping CO2capture using Longcal limestone. Pellets were prepared with: lime and cement (LC); lime and flour (LF); lime, cement and flour (LCF); and lime, cement and flour doped with seawater (LCFSW). Flour was used as a templating material. All samples underwent 20 cycles in a TGA under two different calcination conditions. Moreover, the prepared sorbents were tested for 10 carbonation/calcination cycles in a 68 mm-internal-diameter bubbling fluidized bed (BFB) in three environments: with no sulphur and no steam; in the presence of sulphur; and with steam. When compared to limestone, all the synthetic sorbents exhibited enhanced CO2capture performance in the BFB experiments, with the exception of the sample doped with seawater. In the BFB tests, the addition of cement binder during the pelletisation process resulted in the increase of CO2capture capacity from 0.08 g CO2per g sorbent (LF) to 0.15 g CO2per g sorbent (LCF) by the 10thcycle. The CO2uptake in the presence of SO2dramatically declined by the 10thcycle; for example, from 0.22 g CO2per g sorbent to 0.05 g CO2per g sorbent in the case of the untemplated material (LC). However, as expected all samples showed improved performance in the presence of steam, and the decay of reactivity during the cycles was less pronounced. Nevertheless, in the BFB environment, the templated pellets showed poorer CO2capture performance. This is presumably because of material loss due to attrition under the FB conditions. By contrast, the templated materials performed better than untemplated materials under TGA conditions. This indicates that the reduction of attrition is critical when employing templated materials in realistic systems with FB reactors.
15
Kohitlhetse, Itumeleng, Suter Evans, Musamba Banza und Robert Makomere. „Blast furnace slag for SO2 capture: Optimization and prediction using RSM and ANN“. Chemical Industry and Chemical Engineering Quarterly, Nr. 00 (2024): 6. http://dx.doi.org/10.2298/ciceq230717006k.
Annotation:
The main reaction parameters examined were the amount of blast furnace slag, the hydration duration, ammonium acetate concentration, and temperature. The Response surface methodology was employed to quantify their impact on the sorbent's surface area. Using a central composite design, the surface area of the resulting sorbent corresponding to Brunauer-Emmett-Teller (BET) was investigated. The sorbents produced range in surface area from 49.89 to 155.33 m2/g. Additionally, the effectiveness and response prediction capacities of the Response Surface Methodology (RSM) and Artificial Neural Network (ANN) modeling methodologies were investigated. The models were assessed using various statistical metrics, including (MSE) mean squared error, (ARE) average relative errors, the (SSE) sum of squared errors, (HYBRID) Hybrid fractional error function, (SAE) Sum of the absolute errors, (R2)coefficient of determination, and Root means square. According to statistical evidence, the ANN approach surpassed the RSM-CCD model approach. The surface area of the sorbent was shown to be significantly influenced by interactions between variables in addition to all the individual variables examined. The sorbent was made from a material with substantial structural porosity based on SEM. The functional groups were identified using FTIR. The XRF determined the elemental composition of BFS-based sorbents.
16
Wang, Li Min, Ying Hua Li und Wei Wei. „A Double Imprinted Organic-Inorganic Hybrid Sorbent for Selective Separation of Lead from Aqueous Solution“. Advanced Materials Research 311-313 (August 2011): 1491–95. http://dx.doi.org/10.4028/www.scientific.net/amr.311-313.1491.
Annotation:
A novel ion-imprinted organic-inorganic hybrid sorbent was synthesized and characterized by FT-IR and nitrogen gas adsorption-desorption. The adsorption property and selective recognition ability of the imprinted sorbents for the lead ion were studied. Results showed that the uptake capacities and selectivity coefficients of the double imprinted sorbent were much higher than that of the non-imprinted sorbent. The adsorption capacity of the double imprinted sorbent is 545.6 mg•g-1. The largest relative selectivity coefficient between Pb (II) and Cd (II) was 192. This results suggested that the new sorbent can be used as effective solid-phase material for the selective preconcentration and separation of Pb (II) in environmental water samples.
17
Shurko, N. O., und T. V. Danysh. „Investigation of sorption capacity of dye-affinity sorbents in the process of purification of factor VIII coagulation“. Infusion & Chemotherapy, Nr. 3.1 (11.10.2020): 84–85. http://dx.doi.org/10.32902/2663-0338-2020-3.1-70.
Annotation:
Background. Chromatographic methods, in particular affinity chromatography, are the most effective in obtaining highly purified preparations of plasma proteins. The active triazine and vinyl sulfone dyes are the special group of ligands for affinity chromatograph. We found that the dye-affinity sorbents bind non-target to factor VIII (FVIII) proteins in the previous stages of the study. The sorption capacity of the affinity sorbent is defined as the maximum amount of sample (protein) that can bind to the column under certain conditions. Determining the adsorption limit or limiting capacity of the sorbent makes it possible to identify the feasibility of its use to extract a certain type of protein.
Objective. To study the sorption capacity of various dye-ligand affinity sorbents in the process of purification of FVIII.
Materials and methods. We used next sorbents: Diasorb-Procion Blue HB, Diasorb-Procion Gelb M4R and Diasorb-Procion Blue MXR. The cryoprecipitate was initial material. The total protein concentration was determined by the Bradford method, the activity of factors VIII – one-stage clotting method.
Results and discussion. Sorption of non-target proteins and FVIII activity were investigated after preparation of a number of dilutions of the initial solution of cryoprecipitate. Different concentrations of protein were applied per 1 cm3 of sorbent to select the optimal concentration and do not to oversaturate the column: I – 19.74±0.20 mg of protein/ml; II – 7.94±0.05 mg of protein/ml; III – 3.97±0.05 mg of protein/ml; IV – 1.96±0.04 mg of protein/ml. The maximum sorption capacity among the studied sorbents was 14.62±0.04 mg of protein / 1 cm3 for of sorbent Diasorb-Procion Blue HB. It was found that to achieve maximum purification of FVIII (highest specific activity), the optimal concentration of protein to 1 ml of sorbent should be in the range of 4-8 mg of protein / 1 cm3 of sorbent. The highest degree of purification for these sorbents was 19.65 times at an initial protein concentration of about 4 mg protein/ml (p≤0.01).
Conclusions. The sorption capacity of sorbents was calculated. It was demonstrated that the maximum sorption capacity is approximately 15 (14.62±0.04) mg of protein / 1 cm3 of sorbent.
18
Latif, Shoomaila, Rabia Rehman, Muhammad Imran, Uzma Hira, Shahid Iqbal, Mehwish Akram, Liviu Mitu, Reem I. Alsantali und Zahrah T. Al-thagafi. „Use of Green Chemistry for Amputation of Chromium Ions from Wastewater by Alkali-Treated Composts of Fruit Peels in Economical Way“. Journal of Chemistry 2022 (30.08.2022): 1–14. http://dx.doi.org/10.1155/2022/9924164.
Annotation:
In this work, removal of chromium (VI) using alkali-treated composted peels of lemon (Citrus limonum), mango (Mangifera indica), water melon (Citrullus lanatus), and melon (Cucumis melo) has been studied in batch mode. Physico-chemical characteristics of each sorbent material were determined together with their subsequent characterization by scanning electron microscopic, FTIR, and TGA. The selected sorbent materials were chemically modified using nitric acid and sodium hydroxide solutions. Adsorption efficacy of the selected sorbent materials for Cr (VI) was investigated by optimizing different parameters. The most favorable conditions were as follows: adsorbent dosage = 1.2 g/50mL, pH = 4.0, agitation speed = 170 rpm, 60 minutes = contact time, and temperature = 313°K. Base-treated adsorbents were found to be better adsorbents as compared to the acid treated form which in turn are better than raw adsorbents (adsorbents without chemical modification). Overall, the chosen sorbents removed Cr (VI) in the range of 53.62–96%, whereas the maximum sorption is with base-treated water melon peels (BWMP), that is, 95.98%. The kinetic studies discovered that the results fitted with pseudo-second-order model. Thermodynamic parameters also support that under optimal conditions, all the selected sorbents specifically base-treated sorbents are good enough for the elimination of Cr (VI) ions in an eco-friendly way.
19
Kakhramanov, Nadzgaf T., Junis N. Gahramanly, Rena V. Kurbanova und Reyhan S. Gadzhiyeva. „STUDY OF SORPTION PROCESS OF OIL AND OIL PRODUCTS WITH FOAM POLYMER SORBENTS BASED ON HIGH-IMPACT POLYSTYRENE“. IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 60, Nr. 6 (19.07.2017): 83. http://dx.doi.org/10.6060/tcct.2017606.5583.
Annotation:
Research results of influence of volume mass of crosslinked and foamed sorbents on the basis of secondary high-impact polystyrene with bitumen and zinc stearate upon their sorption capacity are represented. The mechano-chemical synthesis of foamed polymeric sorbents was carried out on the extruder with a three zone material cylinder. Azodicarbonamide was used as foaming agent and dicumyl peroxide was used as crosslinking agent. Foam polymer sorbents have a high buoyancy and hydrophobicity. This circumstance contributes to increasing the selectivity of sorption process of oil and oil products from water surface. The sorption capacity was determined by gravimetric method according to difference between sorbent weights before and after sorption. It was shown that petroleum are better sorbed on foamed polymeric sorbents with low volume weight and greater diameter of closed-celled structures. In the same time the diesel fuel sorbed well on sorbents with relatively high volume weight and accordingly lesser diameter of pores and cells. Petroleum oils are most effectively sorbed on foamed polymeric sorbents which volume weight and cells diameter are interim in comparison with sorbents for sorption of petroleum and diesel fuel. It was determined that rate of sorption processes increases with rising of temperature of aqueous medium independently on pores and cells diameter. In this case changing in sorption capacity occurs according to certain regularity depending on sorbate type, volume weight of sorbent and medium temperature. It was shown that obtained sorbents are characterized by capability to multiple regeneration at keeping of high buoyancy, hydrophobicity and sorption capacity on petroleum and oil products. Forcitation:Kakhramanov N.T., Gahramanly J.N., Kurbanova R.V., Gadzhiyeva R.Sh. Study of sorption process of oil and oil products with foam polymer sorbents based on high-impact polystyrene. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2017. V. 60. N 6. P. 83-88.
20
Khokhlov, A. V. „Chemical-physical features of the biochar-based oil-destructive sorbent“. Himia, Fizika ta Tehnologia Poverhni 14, Nr. 2 (30.06.2023): 255–61. http://dx.doi.org/10.15407/hftp14.02.255.
Annotation:
The main task and relevance of this work are to develop the most effective sorbents for cleaning oil pollution or accidental oil spills. A generalized criterion for evaluating the effectiveness of a sorbent is the local availability and fast renewability of raw materials for biochar. The features of obtaining biochar from cellulose-containing plant raw materials of corn cobs are described. The effect was studied of the pyrolysis conditions of the selected plant material on the physicochemical properties of biochar, which are responsible for the intermolecular interaction of the sorbent with the adsorbed substance and for immobilization and viability of oil degrading bacteria, which indicates the possibility to control the properties of oil destructive sorbent at the production stage. The optimal mode of carbonization of such raw materials has been worked out to obtain a sorbent with porosity and chemical compatibility with oil-degrading bacteria. Cultural cultivation for immobilization of oil-degrading bacteria was carried out in a nutrient medium and a concentrate was prepared. It is shown that biochar with oil-oxidizing microorganisms fixed on its surface has significant sorption and destructive properties.
21
Zalevska, Olha, Lilia Dzihovska und Halyna Sakalova. „THE USE OF SPENT SORPTION MATERIALS FOR THE TREATMENT OF FOOD INDUSTRY WASTEWATER“. Personality and Environmental Issues 3, Nr. 2 (02.07.2023): 33–37. http://dx.doi.org/10.31652/2786-6033-2023-2(4)-33-37.
Annotation:
A significant number of sorbents used in the food industry are not reused due to the complexity of their regeneration and significant material costs. They are often stored on the territory of the enterprise or taken to landfills, usually without authorization. Today, it is important to study the regeneration and reuse of sorbents used in food production. It is promising to use sorbents previously used at the stage of water treatment or preparation of technological solutions and regenerated in wastewater treatment, in particular, in the same food production facilities and in other industries where wastewater contains organic substances.
The article investigates the reuse of a spent sorbent mixture consisting of activated carbon and kieselguhr for the treatment of wastewater from dairy processing enterprises. The results of experimental studies of the dynamics of ion exchange adsorption of lactic acid and alanine by mixed sorbent and spent sorbent under periodic conditions are given. According to the results of the study, the difference in cleaning efficiency for the two options is insignificant and amounts to about 3%, which is within the experimental error.
It is shown that the sorption of pollutant components of wastewater of milk processing enterprises by cheap sorbents, which include regenerated sorbents, is one of the most promising because of their high efficiency, low cost of treatment, and the possibility of further use of spent sorbents in agriculture.
22
Shablovski, Vladimir, Alla Tuchkoskaya, Vladimir Rukhlya, Olga Pap und Kateryna Kudelko. „THE STUDY OF THE SORPTION PROPERTIES OF FILTERING MATERIALS BASED ON TITANIUM PHOSPHATE - POROUS TITANIUM COMPOSITION“. WATER AND WATER PURIFICATION TECHNOLOGIES. SCIENTIFIC AND TECHNICAL NEWS 31, Nr. 3 (22.12.2021): 19–25. http://dx.doi.org/10.20535/2218-930032021244507.
Annotation:
Inorganic sorbents are more selective in comparison with commercial ion exchange resins towards of metal ions. However, inorganic sorbents characterized not high kinetic properties. One of the way to increase the kinetic rate of inorganic sorbents is to reduce the particle size of these materials, other way is synthesizing inorganic sorbents as porous products from powder materials. A sample of such inorganic sorbents is titanium phosphate of various compositions. Studying the properties of microfilters based on composition titanium phosphate - porous titanium has been developed. The sorbents based on acidic titanium phosphate Ti(HPO4)2∙H2O were used for filtering solution with Fe(II) content. It is found that the number of impregnations with inorganic sorbent modificator is important and influence filtration process. The obtained results demonstrated that after the first impregnation of porous material with a smaller pore size, it is possible to obtain such sorbent as a mass content of powder material. By varying the ionic form of titanium phosphate, the porosity of titanium, the amount of impregnation, it could be possible effect on the sorption Fe(II). The sorption properties of titanium-titanium phosphate microfilters were studied by potentiometric titration in the NaCl-NaOH system, as well as the sorption of Fe2+ ions. The degree of purification for Fe(II) from solution with a concentration of 10 mg/l is 64 %. Application an electric potential to the microfilter of porous titanium - phosphate titanium increases the degree of purification of Fe(II) to 88 %.
23
Zhao, Dan Hua, Xiao Jun Liu, Xiu Lian Zhang und Wei Yin. „Facile Synthesis of Dye Waste-Calcium Fluoride Hybrid Absorbent and Application to Dye Wastewater Treatment“. Applied Mechanics and Materials 275-277 (Januar 2013): 2338–45. http://dx.doi.org/10.4028/www.scientific.net/amm.275-277.2338.
Annotation:
A new hybrid material of CaF2/ABB6B (CFAB) was developed by the template-free hybridization of acid brilliant blue 6B (ABB6B) with CaF2. The composition and structure of the material were determined and characterized. In contrast to conventional sorbents, the hybrid material contains lots of negative charges as the basis of specific adsorption. The efficient removal of cationic dyes of victoria blue B (VBB), ethyl violet (EV) and basic brilliant blue BO (BBBO) indicates that it has an improved adsorption capacity and selectivity with a short removal time less than 5 min; while the hybrid sorbents fit the Langmuir isotherm model. Instead of using ABB6B reagent, an ABB6B-producing wastewater was reused to prepare the cost-effective sorbent, and the equilibrium adsorption capacities of which reached 46.29 mg•g-1, 24.81 mg•g-1 and 30.40 mg•g-1 for VBB, EV and BBBO, respectively. The sorbent was then used to treat the actual wastewater samples with satisfactory results of over 96% decolonization and 82% COD-decreasing. This work has developed a simple and eco-friendly method for synthesizing a practical and efficient sorbent. The results shown that the hybrid adsorption material has ideal decolorization and COD lowering efficiency and a good application prospect in dye industrial wastewater treatment.
24
Zhang, Zonghao, Shuai Pi, Donglin He, Changlei Qin und Jingyu Ran. „Investigation of Pore-Formers to Modify Extrusion-Spheronized CaO-Based Pellets for CO2 Capture“. Processes 7, Nr. 2 (24.01.2019): 62. http://dx.doi.org/10.3390/pr7020062.
Annotation:
The application of circulating fluidized bed technology in calcium looping (CaL) requires that CaO-based sorbents should be manufactured in the form of spherical pellets. However, the pelletization of powdered sorbents is always hampered by the problem that the mechanical strength of sorbents is improved at the cost of loss in CO2 sorption performance. To promote both the CO2 sorption and anti-attrition performance, in this work, four kinds of pore-forming materials were screened and utilized to prepare sorbent pellets via the extrusion-spheronization process. In addition, impacts of the additional content of pore-forming material and their particle sizes were also investigated comprehensively. It was found that the addition of 5 wt.% polyethylene possesses the highest CO2 capture capacity (0.155 g-CO2/g-sorbent in the 25th cycle) and mechanical performance of 4.0 N after high-temperature calcination, which were about 14% higher and 25% improved, compared to pure calcium hydrate pellets. The smaller particle size of pore-forming material was observed to lead to a better performance in CO2 sorption, while for mechanical performance, there was an optimal size for the pore-former used.
25
Ubowska, Agnieszka, und Katarzyna Jowtuch. „On Deck Oil Spill Clean-Up Materials – Solution for Engine Rooms“. New Trends in Production Engineering 1, Nr. 1 (01.10.2018): 11–18. http://dx.doi.org/10.2478/ntpe-2018-0001.
Annotation:
Abstract The presence of flammable substances nearby hot surfaces in the engine rooms pose a fire hazard. Therefore the quick and effective removal of oil spills from these areas is of utmost importance. The simplest way is to use sorbent materials having the capacity to absorb oil substances. Oil sorbents comprise of a wide range of organic, inorganic and synthetic products. The choice of form and type of sorbent material depends on the intended application: type of spill, its size and location. The article describes the results of studies aimed to compare the absorbency of selected natural and synthetic sorbents in the context of their application in case of an oil spill in the engine room. Although the natural sorbents should not be used in water, because they absorb it and can in addition contaminate the seabed, they can be used to remove oil spills on the ship. After used they can be disposed on the ship by burning.
26
Ma, Xiaotong, Yingjie Li, Yi Qian und Zeyan Wang. „A Carbide Slag-Based, Ca12Al14O33-Stabilized Sorbent Prepared by the Hydrothermal Template Method Enabling Efficient CO2 Capture“. Energies 12, Nr. 13 (08.07.2019): 2617. http://dx.doi.org/10.3390/en12132617.
Annotation:
Calcium looping is a promising technology to capture CO2 from the process of coal-fired power generation and gasification of coal/biomass for hydrogen production. The decay of CO2 capture activities of calcium-based sorbents is one of the main problems holding back the development of the technology. Taking carbide slag as a main raw material and Ca12Al14O33 as a support, highly active CO2 sorbents were prepared using the hydrothermal template method in this work. The effects of support ratio, cycle number, and reaction conditions were evaluated. The results show that Ca12Al14O33 generated effectively improves the cyclic stability of CO2 capture by synthetic sorbents. When the Al2O3 addition is 5%, or the Ca12Al14O33 content is 10%, the synthetic sorbent possesses the highest cyclic CO2 capture performance. Under harsh calcination conditions, the CO2 capture capacity of the synthetic sorbent after 30 cycles is 0.29 g/g, which is 80% higher than that of carbide slag. The superiority of the synthetic sorbent on the CO2 capture kinetics mainly reflects at the diffusion-controlled stage. The cumulative pore volume of the synthetic sorbent within the range of 10–100 nm is 2.4 times as high as that of calcined carbide slag. The structure of the synthetic sorbent reduces the CO2 diffusion resistance, and thus leads to better CO2 capture performance and reaction rate.
27
Kamizela, Tomasz, Mariusz Kowalczyk, Małgorzata Worwąg, Katarzyna Wystalska, Magdalena Zabochnicka und Urszula Kępa. „Possibilities of Managing Waste Iron Sorbent FFH after CO2 Capture as an Element of a Circular Economy“. Materials 17, Nr. 11 (04.06.2024): 2725. http://dx.doi.org/10.3390/ma17112725.
Annotation:
With a growing need to reduce greenhouse gas emissions, innovative carbon dioxide sorbents are being sought. One of the sorbents being tested is nanoparticle ferric hydrosol (FFH). In parallel with sorbent testing, it is also necessary to test the used sorbent after carbon dioxide capture (FFHCO2) and to develop an optimal method for its processing and management. The research described in this article evaluated the potential use of FFHCO2 in dewatering, coagulation and bioleaching processes. The research results indicate that the basic strategy for dealing with waste FFHCO2 sorbent should be to minimize the amount of waste by volume reduction—dewatering. Recycling of FFHCO2 as an iron waste coagulant or its processing products by bioleaching had no technological justification. It is only proposed to recover the material—iron compounds—if it is environmentally and economically justified.
28
Magomedbekov, E. P., A. O. Merkushkin und A. V. Obruchikov. „Obtaining of low-flammable sorbent based on polyurethane foam for trapping radioactive iodine forms“. Perspektivnye Materialy 10 (2021): 17–26. http://dx.doi.org/10.30791/1028-978x-2021-10-17-26.
Annotation:
The composite sorption material based on a highly porous polyurethane foam matrix with a layer of impregnated activated carbon powder applied to its surface has been developed. The reticulated polyurethane foam Regicell was used as a base for the sorbent samples. The compounds that most effectively inhibit the combustion process were: phosphates, sulfates, borates and pyrosulfates. The selection of the optimal amount of the fire retardant was carried out, and the sorption capacity of the material samples in relation to radioactive methyl iodide was studied. It became clear that the sorbent treated with a 20 % solution of ammonium sulfate can be classified as a material with low combustibility. The study of the sorption capacity was carried out on a certified stand under conditions corresponding to the standard test method for nuclear power plants iodine sorbents. During the tests, more than 99.9 % radioactive methyl iodide trapping efficiency was achieved, which exceeds that for the industrial granular sorbent selected as a comparison. It was found that the gas flow hydraulic resistance corresponding to the manufactured samples is lower than that of the industrial one. The relative sorption capacity index was used as a criterion for comparing the sorption capacity of materials characterized by different free volume fractions.
29
Dunstan, Matthew T., Serena A. Maugeri, Wen Liu, Matthew G. Tucker, Oluwadamilola O. Taiwo, Belen Gonzalez, Phoebe K. Allan et al. „In situ studies of materials for high temperature CO2 capture and storage“. Faraday Discussions 192 (2016): 217–40. http://dx.doi.org/10.1039/c6fd00047a.
Annotation:
Carbon capture and storage (CCS) offers a possible solution to curb the CO2 emissions from stationary sources in the coming decades, considering the delays in shifting energy generation to carbon neutral sources such as wind, solar and biomass. The most mature technology for post-combustion capture uses a liquid sorbent, amine scrubbing. However, with the existing technology, a large amount of heat is required for the regeneration of the liquid sorbent, which introduces a substantial energy penalty. The use of alternative sorbents for CO2 capture, such as the CaO–CaCO3 system, has been investigated extensively in recent years. However there are significant problems associated with the use of CaO based sorbents, the most challenging one being the deactivation of the sorbent material. When sorbents such as natural limestone are used, the capture capacity of the solid sorbent can fall by as much as 90 mol% after the first 20 carbonation–regeneration cycles. In this study a variety of techniques were employed to understand better the cause of this deterioration from both a structural and morphological standpoint. X-ray and neutron PDF studies were employed to understand better the local surface and interfacial structures formed upon reaction, finding that after carbonation the surface roughness is decreased for CaO. In situ synchrotron X-ray diffraction studies showed that carbonation with added steam leads to a faster and more complete conversion of CaO than under conditions without steam, as evidenced by the phases seen at different depths within the sample. Finally, in situ X-ray tomography experiments were employed to track the morphological changes in the sorbents during carbonation, observing directly the reduction in porosity and increase in tortuosity of the pore network over multiple calcination reactions.
30
Cheng, Han Wen, und Ching Tsung Yu. „Characterization of Novel Sorbents for Mercury Removal at Elevated Temperature“. Key Engineering Materials 656-657 (Juli 2015): 23–27. http://dx.doi.org/10.4028/www.scientific.net/kem.656-657.23.
Annotation:
The novel carbonate sorbents of Mg–Al–CO3 and (Mg3−x, Cux)–Al–CO3, were synthesized by co-precipitation method with individual nitrate salt of metal ions under alkaline conditions. The synthetic sorbent was characterized by analysis techniques such as BET surface area analysis, X-ray diffraction (XRD), and scanning electron microscopy (SEM). Elemental mercury capture experiments were carried out in a fixed-bed reactor including Hg permeation source, furnace, and Hg analyzer, which was conducted at temperature ranging from 30 to 300 o C. The major results showed that the surface area of material was significantly increased via incorporating Cu2+ into Mg–Al–CO3, accordingly enhancing Hg retention capacity of sorbents. SEM imagines displayed the layer appearance of Mg/Al and Mg/Cu/Al sorbents. Crystalline analysis indicated lamella structure accompanied with metal oxides within materials. Mercury removal tests demonstrated that the breakthrough time increased with temperature by adding transition metals to Mg–Al–CO3 as (Mg3−x, Cux)–Al–CO3. Hg uptake by the (Mg3−x, Cux)–Al–CO3 sorbent rapidly increased with elevated temperature up to 200 o C and reached the maximum capacity of 12.93 μg/g, and then gradually decreased after 300 o C. Surface area and unique properties of transition metals are the reason toward improving Hg capture sorbent. These results represent the feasibility of using such Hg sorbents for elemental mercury removal under elevated temperature conditions, and the detail mechanism is needed to be further studied.
31
Wibowo, Edy, Mamat Rokhmat, Sutisna, Riri Murniati, Khairurrijal und Mikrajuddin Abdullah. „Thermally Activated Clay to Compete Zeolite for Seawater Desalination“. Advanced Materials Research 1112 (Juli 2015): 154–57. http://dx.doi.org/10.4028/www.scientific.net/amr.1112.154.
Annotation:
We have developed sorbent materials for seawater desalination using different natural materials such as zeolite, clay, soil, coral, and chitosan. The materials were initially activated at temperature range of 200 °C to 600 °C for 3 hours. The greatest salinity reduction was obtained using either activated-zeolite (at 200 °C) or activated-soil (at 600 °C). Surprisingly, thermally activated-soil showed similar efficiency to that of the activated-zeolite. This finding concluded that soil might be a candidate of novel sorbent material to substitute zeolite, the material that is commonly used as sorbent material. Further investigation is in progress to find the optimum method for obtaining the greatest sorption.
32
Kachalkin, Maxim N., und Alexandr V. Voronin. „Preparation of sorbents for solid-phase extraction of benzoic acid from aqueous solutions“. Aspirantskiy Vestnik Povolzhiya 23, Nr. 1 (21.03.2023): 36–40. http://dx.doi.org/10.55531/2072-2354.2023.23.1.36-40.
Annotation:
Aim to obtain sorbents based on ethylcellulose for solid-phase extraction of benzoic acid from aqueous solutions.
Material and methods. To create the sorbents for solid-phase extraction, we used the following reagents: ethyl cellulose, copper sulfate pentahydrate, sodium hydroxide, benzoic acid, purified water, ethyl alcohol 95%. The samples of ethyl cellulose-based sorbents were studied by Fourier transform IR spectrometry on an Agilent Cary 630 FTIR spectrometer. The Agilent Microlab PC Expert software was used for registration and primary processing of IR spectra, and for statistical analysis. The capacity of sorbents for solid-phase extraction was evaluated in a dynamic mode. The microstructure of the samples was studied by field emission scanning electron microscopy (FE-SEM) on a Hitachi SU8000 electron microscope. The specific surface area of the synthesized sorbents was measured by low-temperature nitrogen porometry using the Brunauer Emmett Teller approximation, on the Autosorb 1 device, using the Quantachrome AS1Win software, according to a well-known technique.
Results. А method was proposed for obtaining a sorbent for solid-phase extraction of benzoic acid from aqueous solutions. The IR-spectrometry did not reveal significant differences between ethylcellulose samples and the obtained sorbent samples. The optimal concentrations of ethylcellulose and benzoic acid in the reaction mixture were determined to create a sorbent with a maximum capacity of 19.2 g/g. The differences in the morphological structure of the surface of ethylcellulose matrix and obtained sorbents were described. The specific surface area of ethylcellulose sorbent with a maximum capacity for benzoic acid was 14.10 cm2/g.
33
Myrzalieva, S. K., J. T. Bagasharova, Sh K. Akilbekova und P. Serikbayev. „Natural mineral raw materials as granular filtering materials in industrial and waste water treatment“. Kompleksnoe Ispolzovanie Mineralnogo Syra = Complex Use of Mineral Resources 332, Nr. 1 (03.05.2024): 70–78. http://dx.doi.org/10.31643/2025/6445.06.
Annotation:
Analysis of currently existing methods of natural and waste water treatment from heavy metals has shown that one of the most promising is the sorption method using natural inorganic materials as sorbents: zeolite, diatomite, and vermiculite. The relevance of the topic is dictated by the need to develop an original technology of wastewater treatment and water treatment, which allows constant monitoring of the level of pollution of natural waters by industrial wastewater from metallurgical enterprises. The proposed methods of sorbent modification create a basis for studying the structure, porosity, and sorption capabilities of the mentioned natural materials. All three minerals: zeolite, diatomite, and vermiculite belong to highly porous, structured materials, promising for use as stable sorption systems in water treatment and water purification. The influence of physical and chemical characteristics of natural sorbents and the application of new promising environmentally safe materials and reagents for water treatment are considered. The sorption of copper ions on natural zeolite material before and after its modification by hydrothermal method was investigated. The activity of sorbents was estimated by the value of sorption capacity, i.e. the amount of heavy metal ions absorbed by a unit mass of sorbent based on zeolite and its modified form.
34
Mansurov, Z., I. Digel, M. Biisenbaev, I. Savitskaya, A. Kistaubaeva, N. Akimbekov und A. Zhubanova. „Bio-composite Material on the Basis of Carbonized Rice Husk in Biomedicine and Environmental Applications“. Eurasian Chemico-Technological Journal 14, Nr. 2 (07.02.2012): 115. http://dx.doi.org/10.18321/ectj105.
Annotation:
The future prospects for biomedical and environmental engineering applications of heterogeneous materials on the basis of nano-structured carbonized rice husk are studied. The use of the nano-structured carbonized sorbents as delivery vehicles for the oral administration of probiotic microorganisms has a very big potential for improving functionality, safety and stability of probiotic preparations. The other possible mechanism of nano-structured carbonized sorbents is wound healing activity; the results demonstrated that the use of this material may offer multiple specific advantages in topical wound management. For bioremediation purposes nano-structured carbonized sorbents can be applied as bio-composite sorbent with immobilized microbial consortium consisting of bacterial strains with high oil-oxidizing activity.
35
Mejri, R., Y. S. Peregudov und E. M. Gorbunova. „Technology for obtaining modified oil sorbents“. Proceedings of the Voronezh State University of Engineering Technologies 82, Nr. 4 (20.01.2021): 247–53. http://dx.doi.org/10.20914/2310-1202-2020-4-247-253.
Annotation:
Expediency of using natural glauconite material as a basis for the production of an environmentally friendly sorbent with hydrophobic and magnetic properties for liquidating oil and oil products spills mechanically and using a magnetic field has been substantiated and experimentally proved. Fractional, elemental and oxide compositions of the original mineral have been studied. The structure of glauconite fraction 0.045-0.1 mm has been investigated by transmission electron microscopy. It was found that the surface of the sample particles is heterogeneous with a large number of pores and cracks. Based on the experimental data, the optimal conditions for the production and use of powder and granular sorbents based on glauconite with specified properties were determined, at which a high degree of recovery (more than 90%) of oil with water and hard surfaces. The optimum temperature for obtaining a magnetic oil sorbent is 400 °C. The doses of stearic acid and iron (III) oxide were established at 5 wt. %, which provide hydrophobicity and magnetic properties to the synthesized sorbent. A high degree of oil (97%) and oil (98%) recovery when using a sorbent is achieved at a ratio of 1: 10 to sorbate. To eliminate oil and oil product spills, it is proposed to use granular ferromagnetic sorbents obtained by introducing carboxymethyl cellulose into the modified glauconite composition. oil and oil products granular sorbent increases in comparison with the original mineral by 1.2–2.2 times. Technological schemes for obtaining ferromagnetic hydrophobic and granular sorbents based on glauconite for collecting oil and oil products from water and solid surfaces have been developed. The synthesized sorbents are characterized by high efficiency, low cost, and environmental friendliness.
36
Samodolova, Olesya A., Dmitrii V. Ulrikh, Tatiana M. Lonzinger und Sergey E. Denisov. „The use of foam glass (granular) in urban surface water treatment“. Stroitel'stvo: nauka i obrazovanie [Construction: Science and Education] 13, Nr. 2 (30.06.2023): 131–43. http://dx.doi.org/10.22227/2305-5502.2023.2.9.
Annotation:
Introduction. When purifying natural objects from heavy metals a decisive role is played by sorption technologies, for the development of which new kinds of sorbents are required. The aim of the study is to evaluate the sorption capacity of granulated foam glass in the treatment of surface wastewater (SW) from urbanized areas from heavy metals (on the example of Co, Cr, Cu, Fe, Ni, Pb and Zn). Materials and methods. Granulated foam glass was used as a sorbent. The sorbate was urban surface wastewater from the city of Chelyabinsk. The interaction in the sorbent-sorbate system was studied in laboratory conditions by the limited volume method of static sorption when the pollutants were in the liquid phase and brought into contact with a stationary sorbent. The contact time of the sorbent with the sorbate was varied from 3 to 168 hours and the ambient temperature from 0 to 20 °C. The structure and surface composition of the sorbents were studied using a JEOL JSM-6460LV scanning electron microscope with an attachment for micro X-ray spectral analysis. Changes in the sorbate composition during interaction with the sorbents were determined by atomic emission spectrometry on an OPTIMA 2100 DV spectrometer (Perkin Elmer). Hydrogen index was determined on a pH-meter microprocessor рН-150МИ. Results. The structure and surface composition of granulated cellular glass has been studied. The efficiency of sorption of granulated foam glass of heavy metals from urban surface wastewater has been revealed. Conclusions. The results show that the investigated granulated foam glass is an effective sorption material and allows the extraction of heavy metals (cobalt, chromium, copper, iron, nickel, lead, zinc) from urban surface wastewater.
37
Marsagishvili, T., und M. Machavariani. „THEORETICAL ASPECTS OF PROCESSES OF METAL PARTICLES ADSORPTION INSIDE CHANNELS AND ON SURFACE OF CARBON SORBENTS“. Chemical Problems 20, Nr. 3 (2022): 213–22. http://dx.doi.org/10.32737/2221-8688-2022-3-213-222.
Annotation:
The paper gives a brief analysis of experimental work on the production of sorbents from various biological wastes in one process. The obtained sorbents are used without additional activation. In connection with such experimental material, the theoretical aspects of various processes in the channels and on the surface of the sorbent are considered. The processes of solvation of metal particles in an aqueous medium are considered in the framework of the quantum theory of inhomogeneous condensed media with a redistribution of the electron density of the system. The processes of adsorption on the walls and in the channels of the sorbent are considered taking into account the effects of spatial dispersion of the system.
38
Huynh, Chau Minh, Vu Dinh Thien Vo, Nguyen Thao Nguyen und Mai Anh Nguyen. „Primary and secondary amine material based on crosslinked polystyrene: synthesis and initial application for multiresidue pesticides analysis“. Science and Technology Development Journal - Natural Sciences 2, Nr. 2 (16.05.2019): 47–53. http://dx.doi.org/10.32508/stdjns.v2i2.733.
Annotation:
Weak anion exchange sorbent based on cross-linked polystyrene with primary secondary amine group was prepared by substitution nucleophilic reaction (SN2) between methylene chloride group and 1,2-ethylene diamine. The effect of factors, namely the weight ratio of amine over methylene chloride, reaction time and temperature on nitrogen percentage were studied using experimental design approach. The amination yield rose as all of factors increased but was reduced while both temperature and time increased simultaneously. Nitrogen percentage of the products were varied from 4.0% to 6.3%. Sorbents with predicted capacity of 4.5%, 5.0%, 6.3%, and 6.5% were synthesized. The results showed that the actual capacities of the products were close to the predictions, especially for those in the experimental domain, indicating a good model that can be used to prepare sorbents of any desired capacity. The sorbent application ability of multiresidue pesticides analysis in food were initially investigated through both aspects: interference elimination and analyte content conservation.
39
Shamsudin, Ridwan, Hanisom Abdullah und Som Cit Sinang. „Properties of Oil Sorbent Material Produced From Kenaf Fiber“. International Journal of Environmental Science and Development 6, Nr. 7 (2015): 551–54. http://dx.doi.org/10.7763/ijesd.2015.v6.655.
40
DeWitt, Stephen J. A., Anshuman Sinha, Jayashree Kalyanaraman, Fengyi Zhang, Matthew J. Realff und Ryan P. Lively. „Critical Comparison of Structured Contactors for Adsorption-Based Gas Separations“. Annual Review of Chemical and Biomolecular Engineering 9, Nr. 1 (07.06.2018): 129–52. http://dx.doi.org/10.1146/annurev-chembioeng-060817-084120.
Annotation:
Recent advances in adsorptive gas separations have focused on the development of porous materials with high operating capacity and selectivity, useful parameters that provide early guidance during the development of new materials. Although this material-focused work is necessary to advance the state of the art in adsorption science and engineering, a substantial problem remains: how to integrate these materials into a fixed bed to efficiently utilize the separation. Structured sorbent contactors can help manage kinetic and engineering factors associated with the separation, including pressure drop, sorption enthalpy effects, and external heat integration (for temperature swing adsorption, or TSA). In this review, we discuss monoliths and fiber sorbents as the two main classes of structured sorbent contactors; recent developments in their manufacture; advantages and disadvantages of each structure relative to each other and to pellet packed beds; recent developments in system modeling; and finally, critical needs in this area of research.
41
Dolgikh, V. T., L. G. Pyanova, E. V. Naumkina, A. V. Lavrenov, E. V. Matushchenko und N. V. Kornienko. „Antibacterial Activity of Modified Carbon Sorbents, Prospective for Application“. Antibiotics and Chemotherapy 65, Nr. 7-8 (21.11.2020): 3–7. http://dx.doi.org/10.37489/0235-2990-2020-65-7-8-3-7.
Annotation:
The aim of the work is to study the antibacterial and antimycotic properties of carbon sorbents modified with biologically active substances in relation to pathogens of purulent-inflammatory diseases. Material and methods. The activity of modifier solutions and modified samples of carbon sorbents was studied in relation to test strains of opportunistic microorganisms in comparison with the initial sample of carbon sorbent. A suspension with a known content of microbial cells was prepared from test strains of microorganisms; it was incubated in wells with test samples for 48 hours. The survival of microorganisms was determined by quantitative inoculation from each well of the sample and microorganism mixture at regular intervals of incubation on Petri dishes with simple agar nutrient, then the number of viable microbial cells in the test mixture was counted. Results. Studies have shown high antibacterial and antimycotic activity of modified carbon sorbents. The best result in comparison with the initial sample was demonstrated by a carbon sorbent modified with lactic acid oligomers and immobilized lysozyme. Studies have shown the promise of using modified carbon sorbent samples for the application therapy in bacterial infections.
42
Mamyshov, A. „Methods of Getting Activated Carbon From Plant Materials“. Bulletin of Science and Practice 6, Nr. 12 (15.12.2019): 268–73. http://dx.doi.org/10.33619/2414-2948/61/28.
Annotation:
This article is devoted to the production of activated carbon from vegetable raw materials. Due to the environmental stress, the problem of obtaining and searching for new sorbents, as well as the development of new sorption technologies, is urgent. Of particular interest are many tonnage production, such as, for example, timber processing and chemical industries. The latter is due to two reasons. On the one hand, the technologies of these industries are burdened with significant waste. On the other — wood and its components, natural compounds are the raw material for sorbents, and a unique sorbent is activated charcoal.
43
Rachkovskaya, L. N., A. A. Smagin, V. V. Nimaev, A. Yu Demura, E. E. Rachkovsky, E. S. Yastrebova, V. P. Maltsev, M. A. Korolev und A. Yu Letyagin. „The effect of silver-containing sorbent on red blood cells during hemosorption: an <i>in vitro</i> study“. Сибирский научный медицинский журнал 42, Nr. 5 (27.10.2022): 19–24. http://dx.doi.org/10.18699/ssmj20220503.
Annotation:
The aim of the study was to investigate the influence of the original porous silver–containing sorbent on the morphofunctional parameters of red blood cells during in vitro hemoperfusion. Material and methods. Donor blood was perfused through glass columns filled with a sorbent based on porous aluminum oxide, polydimethylsiloxane and silver nanoclusters and a sorbent without silver. The effect of a silver-containing sorbent on the change in morphofunctional parameters of red blood cells after perfusion through sorbents was determined by scanning flow cytometry. Results and their discussion. Due to the uniformity of the distribution of silver (0.1 %) over the sorbent granules, the parameters of the porous structure – the specific surface area and pore volume – practically do not change compared to the sorbent without silver. Morphological parameters of original donor blood and after hemoperfusion are within the norm. The functional parameters are also normal, although the introduction of silver in to the sorbent slightly increases the number of active band 3 (B3) proteins on erythrocyte membranes, both in comparison with the donor red cell mass as a control and in comparison with the sorbent without silver. There is also an increase in the ultimate extensibility of the erythrocyte membrane compared to the original blood (2.2 times) and the sorbent without silver (1.4 times). Conclusions. A sorbent modified with silver and a sorbent without silver does not have a damaging toxic effect on the morphofunctional parameters of blood under perfusion conditions. The mechanisms affecting the indicators of the ultimate extensibility of the erythrocyte membrane after blood perfusion through a silver-containing sorbent require further research.
44
Li, Zhan Chao, Hong Tao Fan und Ting Sun. „Application of Imprinted Functionalized Silica Gel Sorbent for Selective Removal of Cadmium (II) from Industial Wastewaters“. Advanced Materials Research 213 (Februar 2011): 441–44. http://dx.doi.org/10.4028/www.scientific.net/amr.213.441.
Annotation:
This study investigated the application of an ion imprinted polymer (IIP) with (3-mercaptopropyl) trimethoxysilane (MPS) functionalized the surface of silica gel as a potential sorbent (IIP- MPS/SiO2) for the selective removal and recovery of Cd2+ from industrial wastewaters. IIP- MPS/SiO2 was prepared by a sol–gel method and characterized by IR. Batch studies were performed to evaluate the adsorption process and it was found that the sorbents were found to adsorb selectively Cd2+ in the presence of Co2+, Ni2+, Zn2+ and Cu2+ interferences in the same medium. IIP-MPS/SiO2 sorbent show the selectivity order under competitive conditions: Cd2+ > Co2+ > Ni2+ > Zn2+ > Cu2+. The removal rate of IIP- MPS/SiO2 sorbent for Cd2+ was about 80 % from synthetic wastewater and mine wastewater spiked with 10, 20 and 50 mg•L-1 Cd2+. This work proved that can IIP-MPS/SiO2 sorbent be used as an efficient adsorbent material for selective removal of Cd2+ from wastewaters.
45
Zamparas, Miltiadis, Dimitrios Tzivras, Vassilios Dracopoulos und Theophilos Ioannides. „Application of Sorbents for Oil Spill Cleanup Focusing on Natural-Based Modified Materials: A Review“. Molecules 25, Nr. 19 (02.10.2020): 4522. http://dx.doi.org/10.3390/molecules25194522.
Annotation:
Conventional synthetic sorbents for oil spill removal are the most widely applied materials, although they are not the optimal choices from an economic and environmental point of view. The use of inexpensive, abundant, non-toxic, biodegradable, and reusable lignocellulosic materials might be an alternative to conventional sorbents, with obvious positive impact on sustainability and circular economy. The objective of this paper was to review reports on the use of natural-based adsorbing materials for the restoration of water bodies threatened by oil spills. The use of raw and modified natural sorbents as a restoration tool, their sorption capacity, along with the individual results in conditions that have been implemented, were examined in detail. Modification methods for improving the hydrophobicity of natural sorbents were also extensively highlighted. Furthermore, an attempt was made to assess the advantages and limitations of each natural sorbent since one material is unlikely to encompass all potential oil spill scenarios. Finally, an evaluation was conducted in order to outline an integrated approach based on the terms of material–environment–economy.
46
Cyrus, Johnsely S., und G. B. Reddy. „Sorption and desorption of phosphorus by shale: batch and column studies“. Water Science and Technology 61, Nr. 3 (01.02.2010): 599–606. http://dx.doi.org/10.2166/wst.2010.861.
Annotation:
Constructed wetland systems have gained attention as attractive solutions for wastewater treatment. Wetlands are not efficient to treat wastewater with high concentrations of phosphorus (P). In order to remove high soluble P loads by wetland, sorbent beds can be added prior to the discharge of wastewater into wetlands. Sorption by sorbent materials is identified as a method for trapping excess P in wastewaters. In the present investigation, shale has been identified as a sorbent material for removal of phosphate (PO4-P) due to the cost effectiveness, stability and possibility of regeneration. The study focuses on the removal of PO4-P from wastewater using shale and the feasibility of using the P-sorbed material as slow-release fertilizer. Phosphorus sorption experiments were conducted by using shale (2 mm and 2–4.7 mm). Results indicate that Shale I (particle size = 2 mm) showed the highest sorption of PO4-P (500 ± 44 mg kg−1). Breakthrough point was reached within 10 h in columns with flow rates of 2 and 3 ml min−1. Lower flow rate of 1 ml min−1 showed an average residence time of about 2 h while columns with a higher flow rate of 3 ml min−1 showed a residence time of about 40 minutes. Variation in flow rate did not influence the desorption process. Since very low concentrations of PO4-P are released, Shale saturated with PO4-P may be used as a slow nutrient release source of P or as a soil amendment. The sorbent can also be regenerated by removing the sorbed PO4-P by using 0.1 N HCl.
47
Mamyachenkov, S. V., E. B. Kolmachikhina, D. I. Bludova und O. S. Anisimova. „Choosing sorbent for fluoride ion removal from zinc sulfate solutions“. Izvestiya Vuzov. Tsvetnaya Metallurgiya (Universities' Proceedings Non-Ferrous Metallurgy), Nr. 4 (14.08.2020): 7–15. http://dx.doi.org/10.17073/0021-3438-2020-4-7-15.
Annotation:
The process of zinc sulfate solution purification determines process, economic and environmental production results. Since recently there has been a constant increase in the content of halides in pregnant solutions of zinc production due to the processing of technogenic zinc-containing raw materials, it is relevant to search for methods for removing halides, in particular fluorine, from zinc solutions using a variety of materials. The purpose of this paper was to investigate the effectiveness of akaganeite as an sorbent for fluoride ion removal from zinc sulfate solutions. When using akaganeite, it is especially important to choose a carrier for the sorbent since the nanosized particles of akaganeite make it difficult to clean the solution from the sorbent. Most suitable carriers for this purpose in terms of surface characteristics and physicochemical properties are gypsum and red mud of alumina production. Experiments used a zinc sulfate solution (100 g/dm3 Zn2+, pH = 4.5) containing 26.8–111.4 mg/dm3 F–. The maximum fluoride ion capacity was shown by red mud due to the formation of F–Al complexes. The highest fluorine recovery was demonstrated by red mud with impregnated akaganeite at elevated temperature that facilitates showing akaganeite properties and accelerates the surface ОН– ↔ F– exchange process. The gypsum-based adsorbent successfully removed fluorine due to calcium ions released and calcium fluoride formed. The amount of fluorine removed depends on the sorbent material, its consumption, sorption duration and temperature. The optimal processing conditions were (at pH = 5.5): temperature – 60 °C, process duration – 120 min, composite sorbent consumption – 20÷30 g/dm3. It was shown that composite sorbents based on red mud or gypsum with impregnated akaganeite (β-FeOOH) are most suitable for cleaning zinc solutions from halides. These adsorbents make it possible to achieve the greatest capacity and degree of fluoride ion removal (up to 98–99 %) in the actual pH range of process solutions. The abovementioned sorbents can be regenerated in an alkali solution, and then reused (up to 3–4 cycles).
48
Kušnierová, Maria, Vladimír Šepelák und Ol'ga Šestinová. „Bio-chemical methods in wasteprocessing“. Polish Journal of Chemical Technology 11, Nr. 1 (01.01.2009): 24–27. http://dx.doi.org/10.2478/v10026-009-0007-0.
Annotation:
Bio-chemical methods in wasteprocessing The mineral biotechnologies, the domain of which is primary raw material processing, are increasingly diversifying into some metallurgical areas. The presented results of the research carried out with metallurgical wastes from aluminium production, lead waste remaking and desulphurization zinc-ferrite-based sorbents regeneration prove the possibility of the use of bio-chemical methods. The results obtained and the proposed technologies applying bio-chemical processes enable a complex processing and use of waste sludge from aluminium production and the use of wastes from matte-based copper production for the production of hematite pigments. The use of microorganisms in the desulphurization sorbent regeneration processes allows to increase sorbent's efficiency and its repeated recycling.
49
MALYSHKINA, Elena S. „CLASSIFICATION OF SORBENTS USED IN TECHNOLOGIES FOR PURIFICATION OF WASTE WATER FROM PETROLEUM PRODUCTS“. Urban construction and architecture 10, Nr. 3 (15.12.2020): 26–34. http://dx.doi.org/10.17673/vestnik.2020.03.5.
Annotation:
Currently, there is no a generally accepted classifi cation of the sorbents used in the technologies for wastewater treatment from oil products. The purpose of this work is to more fully systematize the sorbents used in wastewater treatment, depending on their main characteristics, as well as on the economy and environmental friendliness. Based on the existing classifi cations, the generalized classifi cation of the sorbents designed for wastewater treatment from oil products in the dissolved and emulsifi ed forms, and additionally in the fi lm form, was developed and supplemented with the new parameters. A special algorithm, that allows one to make an informed choice of the sorbent in terms of its application effi ciency, environmental protection and material costs, is formed. In this regard, as an example, the classifi cation of pine sawdust has been performed. It can be considered as an eff ective sorbent base.
50
Mardiyati, Yati, Anna Niska Fauza, Onny Aulia Rachman, Steven Steven und Sigit Puji Santosa. „A Silica–Lignin Hybrid Filler in a Natural Rubber Foam Composite as a Green Oil Spill Absorbent“. Polymers 14, Nr. 14 (20.07.2022): 2930. http://dx.doi.org/10.3390/polym14142930.
Annotation:
Oil spills in the marine environment are a rising concern due to their adverse impacts on living creatures and the environment. Hence, remediation methods have been used to remove the oil from the contaminated water. A sorbent material is considered the best method for oil spill absorption. However, commonly used commercial sorbents are made from nonrenewable and nonenvironmentally friendly materials. In this research, natural rubber foam (NRF) was used as a sorbent material with the addition of a filler, i.e., silica and a silica–lignin hybrid, to increase its oil sorption capacity and reusability. The silica and silica–lignin hybrid were extracted from rice husk waste by means of the precipitation method. The silica–lignin hybrid-filled NRF exhibited excellent hydrophobicity, with a water contact angle of 133°, and had more stable reusability compared to unfilled NRF and silica-filled NRF. In addition, the optimum oil absorption capacity of silica–lignin hybrid-filled NRF was 1.36 g g−1. Overall, the results showed that silica–lignin hybrid-filled NRF has the potential to be developed as a green oil absorbent material and is promising in terms of economic and environmental aspects.