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Добірка наукової літератури з теми "Adsorption of organic pollutants"

Автор: Grafiati
Опубліковано: 23 вересня 2022
Оновлено: 27 січня 2023

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Статті в журналах з теми "Adsorption of organic pollutants"

1

Budhiraja, Vaibhav, Anja Urh, Petra Horvat, and Andrej Krzan. "Synergistic Adsorption of Organic Pollutants on Weathered Polyethylene Microplastics." Polymers 14, no. 13 (June 30, 2022): 2674. http://dx.doi.org/10.3390/polym14132674.

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Анотація:
Microplastics (MPs) are persistent tiny pieces of plastic material in the environment that are capable of adsorbing environmental organic pollutants from their surroundings. The interaction of MPs with organic pollutants alters their environmental behavior, i.e., their adsorption, degradation and toxicity, etc. Polyethylene (PE) is the most widely used plastic material. The environmental weathering of PE results in changes to its surface chemistry, making the polymer a much better vector for organic pollutants than virgin PE. In this study, a laboratory-accelerated weathering experiment was carried out with a virgin PE film and an oxidatively degradable PE (OXO-PE) film, i.e., PE modified by the addition of a pro-oxidant catalyst. The degradation of PE and OXO-PE was assessed through Fourier transform infra-red (FTIR) spectroscopy and their wettability was measured by contact angle (CA) measurements. Their thermal properties and morphology were studied using thermogravimetric analyses (TGA) and scanning electron microscopy (SEM), respectively. Further, the adsorption of two model organic pollutants onto weathered and virgin PE was analyzed. Triclosan (TCS) and methylparaben (MeP) were chosen as model organic pollutants for the adsorption experiment due to their frequent use in the cosmetics industry, their uncontrolled release into the environment and their toxicity. The adsorption of both model pollutants onto PE and OXO-PE MP was analyzed by using gas chromatography with a flame ionization detector (GC-FID). The adsorption of MeP onto OXO-PE was higher than onto PE MPs. However, TCS showed insignificant adsorption onto PE and OXO-PE. When both pollutants were present simultaneously, the adsorption of TCS onto both PE and OXO-PE was significantly influenced by the presence of MeP. This result demonstrates that the adsorption behavior of one pollutant can be significantly altered by the presence of another pollutant. Both the effect of weathering on the adsorption of organic pollutants as well as the interaction between organic pollutants adsorbing onto MPs is highly relevant to actual MP pollution in the environment, where MPs are exposed to weathering conditions and mixtures of organic pollutants.
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2

Ye, Lin, Nirmala N. Khandan, and Findlay G. Edwards. "Biological treatment of airstreams contaminated with organic vapors." Water Science and Technology 30, no. 7 (October 1, 1994): 71–74. http://dx.doi.org/10.2166/wst.1994.0311.

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Анотація:
Increases in regulatory control of discharges of organic vapors require improvement of traditional methods of removal and treatment of organic vapors from airstreams. The traditional methods of removal, various forms of adsorption, only change the phase of the pollutants. Subsequent treatment of the pollutants has proven to be energy intensive and therefore expensive. Biological treatment of organics has proven to be inexpensive but requires that the organics be in dissolved form, in the liquid phase, and at a concentration above a minimum concentration. Adsorption of organics in the gas phase onto activated carbon, which is suspended in water, will remove the pollutants from the gas phase and can increase the aqueous concentration, in the region around each activated carbon particle, above the required minimum for biological degradation. The organic pollutants can then be biodegraded leaving harmless by-products. Design of a reactor to provide for the phase change and the biodegradation of the pollutant requires development of a theoretical model and validation of the model.
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3

Song, Xia, Nana Nyarko Mensah, Yuting Wen, Jingling Zhu, Zhongxing Zhang, Wui Siew Tan, Xinwei Chen та Jun Li. "β-Cyclodextrin-Polyacrylamide Hydrogel for Removal of Organic Micropollutants from Water". Molecules 26, № 16 (19 серпня 2021): 5031. http://dx.doi.org/10.3390/molecules26165031.

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Анотація:
Water pollution by various toxic substances remains a serious environmental problem, especially the occurrence of organic micropollutants including endocrine disruptors, pharmaceutical pollutants and naphthol pollutants. Adsorption process has been an effective method for pollutant removal in wastewater treatment. However, the thermal regeneration process for the most widely used activated carbon is costly and energy-consuming. Therefore, there has been an increasing need to develop alternative low-cost and effective adsorption materials for pollutant removal. Herein, β-cyclodextrin (β-CD), a cheap and versatile material, was modified with methacrylate groups by reacting with methacryloyl chloride, giving an average degree of substitution of 3 per β-CD molecule. β-CD-methacrylate, which could function as a crosslinker, was then copolymerized with acrylamide monomer via free-radical copolymerization to form β-CD-polyacrylamide (β-CD-PAAm) hydrogel. Interestingly, in the structure of the β-CD-PAAm hydrogel, β-CD is not only a functional unit binding pollutant molecules through inclusion complexation, but also a structural unit crosslinking PAAm leading to the formation of the hydrogel 3D networks. Morphological studies showed that β-CD-PAAm gel had larger pore size than the control PAAm gel, which was synthesized using conventional crosslinker instead of β-CD-methacrylate. This was consistent with the higher swelling ratio of β-CD-PAAm gel than that of PAAm gel (29.4 vs. 12.7). In the kinetic adsorption studies, phenolphthalein, a model dye, and bisphenol A, propranolol hydrochloride, and 2-naphthol were used as model pollutants from different classes. The adsorption data for β-CD-PAAm gel fitted well into the pseudo-second-order model. In addition, the thermodynamic studies revealed that β-CD-PAAm gel was able to effectively adsorb the different dye and pollutants at various concentrations, while the control PAAm gel had very low adsorption, confirming that the pollutant removal was due to the inclusion complexation between β-CD units and pollutant molecules. The adsorption isotherms of the different dye and pollutants by the β-CD-PAAm gel fitted well into the Langmuir model. Furthermore, the β-CD-PAAm gel could be easily recycled by soaking in methanol and reused without compromising its performance for five consecutive adsorption/desorption cycles. Therefore, the β-CD-PAAm gel, which combines the advantage of an easy-to-handle hydrogel platform and the effectiveness of adsorption by β-CD units, could be a promising pollutant removal system for wastewater treatment applications.
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Adegoke, Kayode Adesina, Rhoda Oyeladun Oyewole, Bukola Morenike Lasisi, and Olugbenga Solomon Bello. "Abatement of organic pollutants using fly ash based adsorbents." Water Science and Technology 76, no. 10 (July 28, 2017): 2580–92. http://dx.doi.org/10.2166/wst.2017.437.

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Анотація:
Abstract The presence of organic pollutants in the environment is of major concern because of their toxicity, bio-accumulating tendency, threat to human life and the environment. It is a well-known fact that, these pollutants can damage nerves, liver, and bones and could also block functional groups of essential enzymes. Conventional methods for removing dissolved pollutants include chemical precipitation, chemical oxidation or reduction, filtration, ion-exchange, electrochemical treatment, application of membrane technology, evaporation recovery and biological treatment. Although all the pollutant treatment techniques can be employed, they have their inherent advantages and limitations. Among all these methods, adsorption process is considered better than other methods because of convenience, easy operation and simplicity of design. A fundamentally important characteristic of good adsorbents is their high porosity and consequent larger surface area with more specific adsorption sites. This paper presents a review of adsorption of different pollutants using activated carbon prepared from fly ash sources and the attendant environmental implications. Also, the ways of overcoming barriers to fly ash utilization together with regeneration studies are also discussed.
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5

Shanahan, Caitlin J., and Jason J. Keleher. "Biomimetic Adsorptive Composites for Redox Remediation of Organic Pollutants." ECS Meeting Abstracts MA2022-02, no. 64 (October 9, 2022): 2384. http://dx.doi.org/10.1149/ma2022-02642384mtgabs.

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Анотація:
Conductive hydrogels have gained interest as responsive materials for pollutant sensing and degradation in a variety of applications such as wastewater and soil remediation. There has been a significant increase in both commercial and domestic wastewater, which is output into ground sources, acting as a leading contaminant for surrounding communities. Specifically, cationic organic textile dyes such as methylene blue, methyl red, and methyl violet which are known monoamine oxidase inhibitors are prevalent pollutants. To improve remediation, this work employs a biopolymeric (i.e. polysaccharide) matrix to aid in non-covalent adsorption of pollutants to the network. Additionally, modification of the polysaccharide backbone with a conductive polymer can promote electron transfer throughout the matrix. This work employs the photoinitiation of a metal-polysaccharide complex to directly polymerize polyaniline (PANI) on the polysaccharide backbone. The PANI-functionalized composite can be utilized as a reducing substrate for the adsorptive redox remediation of the organic pollutants that occur in contaminated soils or water supplies.
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6

Liu, Chongmin, Pingxiao Wu, Lytuong Tran, Nengwu Zhu, and Zhi Dang. "Organo-montmorillonites for efficient and rapid water remediation: sequential and simultaneous adsorption of lead and bisphenol A." Environmental Chemistry 15, no. 5 (2018): 286. http://dx.doi.org/10.1071/en18057.

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Environmental contextNovel materials are increasingly being sought-after to remove metals and organic pollutants from water. We investigated two organo-functionalised montmorillonites for sequential and simultaneous adsorption of lead and bisphenol A. Our findings could lead to new approaches for handling emergency complex pollution events. AbstractOrgano-montmorillonites (OMts) modified by two different carbon chain lengths of betaine were used to remove the combined pollution (heavy metal and organic pollutant) from a water environment, sequentially and simultaneously. The properties of OMts were measured with X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetry-Differential Scanning Calorimetry (TG-DSC). The independent adsorption of a single pollutant, direct sequential adsorption, indirect sequential adsorption and simultaneous adsorption of bisphenol A (BPA) and lead ion (Pb2+) onto OMts were investigated. Initial concentrations, reaction time, solution pH and the release amount of pre-adsorbed contaminant in the sequential sorption system were also investigated for the adsorption behaviours of Pb2+ and BPA. Two kinetic models and two adsorption isotherms were applied to explain the adsorption process. The adsorptive mechanism of BPA adsorption onto OMts was ascribed to a hydrophobic interaction, while the mechanism for Pb2+ adsorption was attributed to cation exchange, surface adsorption, electrostatic attraction and complexation from the results of specific surface area Brunauer–Emmett–Teller (BET) and X-ray photoelectron spectroscopy (XPS). This study might provide valuable information for the application of novel organoclays to the removal of both heavy metal and organics from water.
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7

Li, Yinchun, Depeng Gong, Youliang Zhou, Chaocan Zhang, Chunyang Zhang, Yitian Sheng, and Shu Peng. "Respiratory Adsorption of Organic Pollutants in Wastewater by Superhydrophobic Phenolic Xerogels." Polymers 14, no. 8 (April 14, 2022): 1596. http://dx.doi.org/10.3390/polym14081596.

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Анотація:
Organogel adsorbents are widely used for the adsorption of hard-to-degrade organic pollutants in wastewater due to their natural affinity to the organic phase in water. In this study, phenolic xerogels (PF) synthesised in the ethylene glycol inorganic acid system are used as a backbone and superhydrophobic phenolic xerogels (ASO-PF) are obtained by grafting aminosilanes onto the PF backbone via the Mannich reaction. The modified ASO-PF not only retains the pore structure of the original PF (up to 90% porosity), but also has excellent superhydrophobic properties (water contact angle up to 153°). Owing to the unique pore structure, ASO-PF has excellent compression properties, cycling 50% compression deformation more than 10 times without being damaged, with a maximum compression deformation of up to 80%. A squeeze–suction–squeeze approach is proposed for selective adsorption of organic pollutants in homogeneous solutions based on the recyclable compression properties of ASO-PF. The ASO-PF is put under negative pressure by squeezing, and when the pressure is released, the adsorbed liquid enters the ASO-PF, where the organic pollutants are retained by the adsorption sites in the skeleton, and then the remaining water is discharged by squeezing. This breathing ASO-PF holds great promise for organic pollutant adsorption and recovery applications.
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8

Bell, J. P., and M. Tsezos. "Removal of Hazardous Organic Pollutants by Adsorption on Microbial Biomass." Water Science and Technology 19, no. 3-4 (March 1, 1987): 409–16. http://dx.doi.org/10.2166/wst.1987.0221.

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Анотація:
Removal of five toxic organic compounds from water by adsorption on microbial biomass was investigated. Lindane, diazinon, malathion, pentachlorophenol, and the PCB 2-chlorobiphenyl were adsorbed onto two types of inactive microbial biomass (a pure strain of Rhizopusarrhizus, and a mixed culture of activated sludge). Desorption and the thermodynamics of the adsorption process were also investigated. With the exception of malathion, the adsorptive uptake data fit the Freundlich equation and were well correlated with the octanol/water partition coefficient, but not as well correlated with water solubility of the compounds. Except for malathion the adsorption was reversible. Malathion showed unusually high apparent uptake and the removal appeared to be irreversible. The experimental evidence suggests that the disappearance of malathion resulted from a chemical reaction, while physical adsorption appears to account for removal of the other compounds.
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9

Rezaei, Hassan, Saeedeh Rastegar, Seyyed Aliakbar Hedayati, Yousef Dadban Shahamat, and Omid Sedaghat. "Isothermal and Kinetic Evaluation of Adsorption Fish Farm Effluents by Nanocomposites (Chitosan and Activated Carbon)." Journal of Advances in Environmental Health Research 9, no. 2 (April 1, 2021): 129–38. http://dx.doi.org/10.32598/jaehr.9.2.1196.

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Анотація:
Background: In wastewater treatment, removal of phosphate and ammonia is of great importance. Chitosan is a copolymer, which can be applied in low-cost adsorption. Thus, in this study, chitosan and activated carbon nanocomposite adsorbents were prepared to remove organic pollutants from the fish farm effluents. Methods: This study was performed at different physicochemical conditions of pH (5-8), effluent dose (25-100 mg/L), and contact time (15-90 min) minutes. Adsorption isotherm studies were analyzed using Freundlich, Langmuir models, and adsorption kinetics studies. Results: The Langmuir and Freundlich isotherms for nitrite (R2=0.9076, R2=0.5911), phosphate (R2=0.9307, R2=0.5755), and ammonia (R2=0.7288 and R2=0.7549) were respectively obtained. According to the results, the data of nitrite and phosphate pollutants were more consistent with the Langmuir model, but the data of ammonia pollutants were more consistent with the Freundlich. The best optimal adsorption occurred at a pH=7. Elevation of the initial concentration of the pollutant led to the depletion of the removal functions. With increasing the contact time, adsorption efficiency increased. Conclusion: Finally, with respect to the obtained elimination percentage (R=99.98%), chitosan and activated carbon nanocomposites have a high ability to remove organic pollutants.
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Zhao, Meng, Lei Huang, Samuel Raj Babu Arulmani, Jia Yan, Lirong Wu, Tao Wu, Hongguo Zhang, and Tangfu Xiao. "Adsorption of Different Pollutants by Using Microplastic with Different Influencing Factors and Mechanisms in Wastewater: A Review." Nanomaterials 12, no. 13 (June 30, 2022): 2256. http://dx.doi.org/10.3390/nano12132256.

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Анотація:
The studies on microplastics are significant in the world. According to the literature, microplastics have greatly specific surface areas, indicating high adsorption capacities for highly toxic pollutants in aquatic and soil environments, and these could be used as adsorbents. The influencing factors of microplastic adsorption, classification of microplastics, and adsorption mechanisms using microplastics for adsorbing organic, inorganic, and mixed pollutants are summarized in the paper. Furthermore, the influence of pH, temperature, functional groups, aging, and other factors related to the adsorption performances of plastics are discussed in detail. We found that microplastics have greater advantages in efficient adsorption performance and cost-effectiveness. In this paper, the adsorptions of pollutants by microplastics and their performance is proposed, which provides significant guidance for future research in this field.
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Більше джерел

Дисертації з теми "Adsorption of organic pollutants"

1

Subramani, Arun. "ADSORPTION OF ORGANIC POLLUTANTS ONTO NATURAL ADSORBENTS." MSSTATE, 2002. http://sun.library.msstate.edu/ETD-db/theses/available/etd-08102002-210619/.

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Анотація:
In this research, the adsorptive capacities of kenaf, peat moss, hay, and peanut hulls were evaluated for the removal of TNT and 2,4-DCP from aqueous solutions. Adsorbent loading capacities determined by batch studies were verified by continuous column experiments. It was found that the adsorption capacity of the candidate adsorbents were significantly lower than granular activated carbon (GAC). The impact of surface modification techniques, such as surface oxidation, were evaluated to study the effect on adsorption capacity. At lower equilibrium concentrations of the adsorbate (less than 10 ppb), surface oxidation by ozone showed an increase in the adsorption capacity. The same trend was not observed with peroxone and ultrasound pretreatment. The adsorbent requirement for treating water contaminated with TNT and 2,4-DCP were calculated based on the adsorptive capacity of the adsorbents. Though the adsorbent requirements for the candidate adsorbents were considerably higher than granular activated carbon, the adsorbent requirement costs for most of the candidate adsorbents tested were competitive when compared to GAC costs.
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2

Ding, Chunli. "Organic cation-modified iron oxide-coated sand for adsorption of natural organic matter /." View abstract or full-text, 2009. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202009%20DING.

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3

JASPER, ANTHONY JOHN. "Impact of Nanoparticles and Natural Organic Matter on the Removal of Organic Pollutants by Activated Carbon Adsorption." University of Cincinnati / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1218743967.

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4

Hunter, Paige Holt. "Control of Volatile Organic Compound (VOC) Air Pollutants." Diss., Virginia Tech, 2000. http://hdl.handle.net/10919/38614.

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Анотація:
A variety of methods exist to remove volatile organic compound (VOC) air pollutants from contaminated gas streams. As regulatory and public opinion pressures increase, companies are searching for more effective methods to control these emissions. This document is intended as a guide to help determine if existing systems are adequate and to provide additional information to improve the efficiency of the systems. It explores conventional methods of controlling VOC emissions, as well as innovative technologies including membrane separation, plasma destruction, and ozone catalytic oxidation. The conventional technologies covered include condensation, adsorption, absorption (or scrubbing), thermal incineration, flaring, catalytic incineration, and biofiltration. Each chapter includes a description of the technology, a discussion of the types of systems available, notes on the design of the system, economic estimates, an explanation of potential problems, and a list of considerations for installation and maintenance concerns. The final chapter is dedicated to the preparation and characterization of metal catalysts which were developed to improve the reaction rate of VOCs using ozone as an oxidant.
Ph. D.
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5

Lladó, Valero Jordi. "Adsorption of organic and emerging pollutants on carbon materials in aqueous media : environmental implications." Doctoral thesis, Universitat Politècnica de Catalunya, 2016. http://hdl.handle.net/10803/387438.

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Анотація:
In the last two decades an increasing presence of organic substances such drugs, pesticides, etc. has been detected in water which may affect the health of the organisms and the environment. Some of these contaminants remain in the water after the usual treatment in sewage plants. This fact makes evident the need of introduction of the tertiary treatments that allow the complete elimination of these substances. This Doctoral Thesis researches for the elimination of different organic and emerging compounds present in water by means of the adsorption with new activated carbons. In particular, new carbon materials from different wastes, coal, synthetic materials, which have been produced and characterized, allow the adsorption of the organic compounds widely used in society. Different characteristics of the adsorbents (chemical composition, functional groups, texture, etc.) and of adsorbates (dimensions, hydrophobicity, pKa, functional groups, etc.) that influence on the adsorption process have been studied. Moreover, in this work, an analysis and kinetic model have been proposed. The analytic model allow, by chemometrics, enhancing the quantification of two or more organic compounds in solution by spectroscopy UV-vis. The kinetic model proposed provides a better comprehension and interpretation, as a better prediction of the different parameters on the adsorption process. In this sense, the following Thesis presents five works which have allowed a better comprehension of the adsorption process by means carbon materials from different origin. The first work, “highly microporous activated carbons from biocollagenic wastes as adsorbents or aromatic pollutants in water originating from industrial activities”, about the texture and chemical composition of activated carbon from biocollagenic wastes which have been studied in order to observe how these parameters affect on the adsorption of aromatic monosubstitued compounds. Moreover, different variables as temperature and activating agent are studied in the process of manufacture activated carbons. The second work, “Removal of pharmaceutical and Iodinated Contrast Media (ICM) compounds on carbon xerogels and activated carbons. NOM and textural properties influences”, shows the important role of pore size distribution in activated carbon which plays on the adsorption of different pharmaceuticals (salicylic acid, paracetamol, diclifenac, etc.) and iodinated contrast media (iohexol, iodixanol, iomeprol, etc) of different size. The influence of natural organic matter (NOM) in water is also studied in the adsorption of the all pollutants. The adsorption of paracetamol, phenol and salicylicacid in different coal-based activated carbon is showed in the contain of the work “Removal of pharmaceutical pollutants in water using coal-based activated carbons”. In this work, the chemical characteristics on the surface of activated carbons are studied in order to observe the influence in the adsorption of different organic compounds; and also the influence of the pH water. The results showed an increase of adsorption of salicylates due to the presence of sulphur on the surface of the adsorbent. The fourth work; “Multicomponent adsorption on coal-based activated carbons on aqueous media: new cross-correlation analysis method”, as a continuation of the previous work, shows a new chemometric technique that allows to analysis the binary and ternary solutions correctly by UV-vis spectroscopy. Moreover, the competitive effect between two or three molecules is studied on the adsorption process. In the last work, “Role of activated carbon properties in atrazine and paracetamol adsorption equilibrium and kinetics”, a new kinetic model is proposed for the adsorption of paracetamol and atrazine using activated carbon from sewage sludge and two, commercial, activated carbons.
En les darreres dues dècades s’ha detectat un increment de la presència de substàncies orgàniques com els fàrmacs, els pesticides,... en l’aigua que poden afectar la salut dels éssers vius i del medi ambient. Algun d'aquests contaminants romanen en les aigües després d’haver passat pels tractaments habituals en les plantes depuradores de tractament. Aquest fet fa evident la necessitat de la implantació de tractament terciaris que permetin la seva completa eliminació. La present Tesi doctoral estudia l’eliminació de diferents compostos orgànics i emergents presents en aigua mitjançant la tecnologia d’adsorció amb nous carbons activats. Concretament, s'han produït i caracteritzat nous materials carbonosos procedents de residus, carbó mineral, materials sintètics, ... que permeten adsorbir diferents compostos orgànics d'ampli us en la nostra societat. S'han estudiat les característiques dels adsorbents (composició química, grups funcionals, porositat) i dels adsorbats (dimensions, hidrofobicitat, pKa, grups funcionals...) que influeixen en el procés d’adsorció. A més a més, en aquest treball, s'han proposat dos nous models, un d'anàlisi i un altre cinètic. El model analític permet, mitjançant la quimiometria, millorar la quantificació de dos o més compostos orgànics presents en una mescla per espectroscòpia UV-vis. El model cinètic proposat proporciona una millor comprensió i interpretació, així com una millor predicció dels diferents paràmetres del procés d'adsorció. En aquest sentit, en la següent Tesi es presenten cinc treballs que han permès una millor comprensió del procés d’adsorció mitjançant materials carbonosos de diferents procedències. En el primer treball, “Highly microporous activated carbons from biocollagenic wastes as adsorbents or aromatic pollutants in water originating from industrial activities”, s'ha estudiat com afecta la textura i la composició química de carbons activats procedents de residus de pells en l'adsorció de compostos aromàtics monosubtituits. A més a més s’estudia com afecten diferents variables com temperatura i agent activant en el procés de fabricació dels carbons activats. El segon treball, “Removal of pharmaceutical and Iodinated Contrast Media (ICM) compounds on carbon xerogels and activated carbons. NOM and textural properties influences”, posa de manifest el rellevant paper que juga la distribució de porus d’un carbó activat en l’adsorció de diferents fàrmacs (àcid salicílic, paracetamol, diclofenac, ...) i agents de contrast (iohexol, iodixanol, iomeprol,...) de diferent mida. També, s’ha estudiat la influència de la matèria orgànica present en l’aigua en l’adsorció de tots els contaminants. L’estudi de l’adsorció de paracetamol, fenol i àcid salicílic en diferents carbons activats procedents de carbó mineral es reflexa en el treball “Removal of pharmaceutical pollutants im water using coal-based activated carbons”. En aquest treball s'estudia la influència de les característiques químiques de la superfície dels carbons activats en l’adsorció dels diferents compostos orgànics, així com la influència del pH de les aigües. Els resultats van mostrar un augment de l’adsorció de salicilats degut a la presència de sofre en l'adsorbent. El quart treball, “Multicomponent adsorption on coal-based activated carbons on aqueous media: new cross-correlation analysis method”, és una continuació del treball anterior. En aquest cas, es presenta un nova tècnica quimiomètrica que permet analitzar correctament mescles binàries i ternàries per espectroscòpia UV-vis. A més s’estudia l’efecte competitiu entre dues o tres molècules en el procés d'adsorció. El cinquè i últim treball, "Role of activated carbon properties in atrazine and paracetamol adsorption equilibrium and kinetics", planteja un nou model cinètic per a l’adsorció de paracetamol i atrazina mitjançant carbó activat procedent de fangs de depuradora i dos carbons comercials.
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6

Fei, Yingheng, and 费颖恒. "Adsorption of emerging environmental pollutants by marine sediment in relation to sediment organic diagensis." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B48329782.

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Ever-growing discharges of various emerging chemical contaminants are imposing a great threat of pollution to the coastal environment. Adsorption by sediment plays an essential role in the transport and fate of pollutants in the aquatic system. The sorption of emerging contaminants onto sediment is believed to be largely dependent on the sediment organic matter (SOM). In the present study, laboratory experiments were carried out on the changes of the adsorption behavior of sediment during the sediment aging and diagenesis process. A few EDCs and antibiotics were selected as the model emerging compounds for the adsorption tests. The results demonstrated that both the quantity and the quality of the SOM affected the adsorption of the model pollutants, such as 17α-ethinyl estradiol (EE2) and bisphenol A (BPA), onto the marine sediment collected from Victoria Harbour, Hong Kong. The adsorption isotherms can be well described by the linear partition model. Natural and artificial sediment with a high SOM content was incubated for 4-6 months to simulate the natural diagenesis process. The most rapid degradation of labile SOM occurred in the first 1 month or so and afterward, SOM reduction became slower. Microbial activity played an important role in SOM degradation and transformation. A rapid initial bacterial growth was observed in the sediment, followed by a slow endogenous decay. The dynamics of biomass growth and decay first transformed the labile SOM into biomass and microbial byproducts. After the exhaust of readily biodegradable SOM, the biomass decay produced humic-like substances, resulting in more refractory and condensed SOM residues in the sediment. More importantly, the degradation and transformation of SOM displayed a profound impact on the adsorption behavior of the sediment. For the selected EDCs and antibiotics, including BPA, EE2, nonylphenol (NP), phenanthrene (PHE) and tetracyclines (TCs), the adsorption capacity indicated by the partition coefficient, Kd, decreased at the beginning of SOM diagenesis. The Kd values for different chemicals recovered lately to different extents as the result of the SOM condensation and humification. All of the organic matter normalized partition coefficients, KOM, of the concerned pollutants increased considerably in the late phase of SOM diagenesis. Based on the experimental results, a general conceptual model was established to describe SOM diagenesis and its impact on chemical adsorption by the sediment. According to the model prediction, the SOM profile would become more dominated by the condensed and refractory fractions during sediment diagenesis with an increasing affinity and partition capacity for organic contaminants. Moreover, the release of adsorbed contaminants from marine sediment in the simulated digestive fluids was investigated. In general, the presence of gastric pepsin and bile salts helped the desorption of hydrophobic pollutants from the sediment into the digestive solutions. The influence of the SOM diagenetic status on chemical desorption from the sediment varied between EDCs of different chemical properties. It is apparent that aged sediment could bring more emerging pollutants into the digestive system of receiving organisms, imposing a potential risk to human health through the food chain.
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Civil Engineering
Doctoral
Doctor of Philosophy
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7

Tasca, Andrea Luca. "Novel amorphous silica and silica xerogels for the adsorption of organic pollutants from water." Thesis, University of Strathclyde, 2017. http://digitool.lib.strath.ac.uk:80/R/?func=dbin-jump-full&object_id=28804.

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Guan, Xiaohong. "Adsorption of phosphates and organic acids on aluminum hydroxide in aquatic environment : mechanisms and interactions /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?CIVL%202005%20GUAN.

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Li, Chi-Wang. "Characterizing the properties and reactions of natural organic matter by UV spectroscopy : adsorption of NOM and formation of disinfection by-products /." Thesis, Connect to this title online; UW restricted, 1998. http://hdl.handle.net/1773/10150.

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Odem, Wilbert Irwin. "COMPETITIVE ADSORPTION OF VOLATILE ORGANIC COMPOUNDS ONTO NATURAL AND SYNTHETIC ADSORBENTS (TRICHLOROETHYLENE, 1,4-DICHLOROBENZENE, TETRACHLOROETHYLENE, CARBON TETRACHLORIDE, PREDICTIVE MODELS)." Thesis, The University of Arizona, 1985. http://hdl.handle.net/10150/275458.

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Книги з теми "Adsorption of organic pollutants"

1

Lyon, William G. The swelling properties of soil organic matter and their relation to sorption of non-ionic organic compounds: Project summary. Ada, OK: U.S. Environmental Protection Agency, Robert S. Kerr Environmental Research Laboratory, 1991.

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2

Kjeldsen, Peter. Sorption af organiske stoffer i jord og grundvand. [Lyngby]: Lossepladsprojektet, 1988.

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3

Graese, Sandra L. GAC filter-adsorbers. Denver, Colo: American Water Works Association, 1987.

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4

Fu, Jaw-Kwei. Pollutant sorption to soils and sediments in organic/aqueous solvent systems. Athens, GA: U.S. Environmental Protection Agency, Environmental Research Laboratory, 1985.

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5

Fu, Jaw-Kwei. Pollutant sorption to soils and sediments in organic/aqueous solvent systems. Athens, GA: U.S. Environmental Protection Agency, Environmental Research Laboratory, 1985.

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6

Organic Pollutants. London: Taylor & Francis Inc, 2004.

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7

Vasanthy, M., V. Sivasankar, and T. G. Sunitha, eds. Organic Pollutants. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-72441-2.

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8

Harrad, Stuart. Persistent organic pollutants. Hoboken, N.J: Wiley, 2009.

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9

Kumari, Kanchan. Persistent Organic Pollutants. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003046806.

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Harrad, Stuart, ed. Persistent Organic Pollutants. Chichester, UK: John Wiley & Sons, Ltd, 2009. http://dx.doi.org/10.1002/9780470684122.

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Частини книг з теми "Adsorption of organic pollutants"

1

Zimmer, Gerhard, Heinz-Jürgen Brauch, and Heinrich Sontheimer. "Activated-Carbon Adsorption of Organic Pollutants." In Advances in Chemistry, 579–96. Washington, DC: American Chemical Society, 1988. http://dx.doi.org/10.1021/ba-1988-0219.ch033.

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2

Bello, Mustapha Mohammed, and Abdul Aziz Abdul Raman. "Adsorption and Oxidation Techniques to Remove Organic Pollutants from Water." In Environmental Chemistry for a Sustainable World, 249–300. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-92111-2_8.

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3

Anielak, Piotr, and Konrad Janio. "The Influence of Molecular Oxygen on the Adsorption of Organic Pollutants." In Chemistry for the Protection of the Environment 2, 277–81. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0405-0_30.

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4

Chiou, C. T. "Partition and Adsorption on Soil and Mobility of Organic Pollutants and Pesticides." In Ecological Studies, 163–75. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74468-6_7.

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5

Malaiyandi, Murugan, R. H. Wightman, and C. LaFerriere. "Concentration of Selected Organic Pollutants: Comparison of Adsorption and Reverse-Osmosis Techniques." In Advances in Chemistry, 163–79. Washington, DC: American Chemical Society, 1986. http://dx.doi.org/10.1021/ba-1987-0214.ch008.

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6

Rodríguez-Estupiñán, Paola, Yaned Milena Correa-Navarro, Liliana Giraldo, and Juan Carlos Moreno-Piraján. "Lignocellulosic Wastes as Precursor of Carbonaceous Magnetic Adsorbents by Organic and Inorganic Pollutants Adsorption." In Environmental Chemistry for a Sustainable World, 105–42. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-64092-7_4.

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Sathianesan Vimala, Sheen Mers, Omar Francisco González-Vázquez, Ma del Rosario Moreno-Virgen, Sathish-Kumar Kamaraj, Sheem Mers Sathianesan Vimala, Virginia Hernández-Montoya, and Rigoberto Tovar-Gómez. "Removal of Priority Water Pollutants Using Adsorption and Oxidation Process Combined with Sustainable Energy Production." In Metal, Metal-Oxides and Metal-Organic Frameworks for Environmental Remediation, 117–45. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68976-6_5.

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Sarma, Jyotirmoy, Anannya Kalita, Puspa Sharma, Mousumi Bora, and Sanchayita Rajkhowa. "Removal of Organic Pollutants from Waste Water by Adsorption onto Rice Husk-Based Adsorbents, an Agricultural Waste." In Recent Trends in Wastewater Treatment, 287–313. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-99858-5_13.

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Alloway, B. J., and D. C. Ayres. "Organic pollutants." In Chemical Principles of Environmental Pollution, 196–259. Dordrecht: Springer Netherlands, 1993. http://dx.doi.org/10.1007/978-94-011-2148-4_6.

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Schwarzbauer, Jan, and Branimir Jovančićević. "Organic Pollutants." In Fundamentals in Organic Geochemistry, 55–156. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-68938-8_2.

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Тези доповідей конференцій з теми "Adsorption of organic pollutants"

1

Zhang, Chunlei, Daoping Guo, Jing Fan, Rongfang Yuan, Junnong Gu, Dan Wang, and Beihai Zhou. "Competitive adsorption amongst several organic pollutants on activated carbon." In 2011 International Conference on Electric Technology and Civil Engineering (ICETCE). IEEE, 2011. http://dx.doi.org/10.1109/icetce.2011.5774633.

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2

Tsyntsarski, Boyko. "NEW COMBINED MEMBRANE-ADSORPTION TECHNOLOGY FOR PURIFICATION OF WATER FROM ORGANIC POLLUTANTS." In 17th International Multidisciplinary Scientific GeoConference SGEM2017. Stef92 Technology, 2017. http://dx.doi.org/10.5593/sgem2017/31/s12.059.

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3

Zhang, Lu, Haitao Li, Jie Liu, Yixin Yang, Yingying Li, Dan Song, Wei Xu, Gengzhi Yu, and Mingsheng Luo. "Adsorption and catalytic ozonation of organic pollutants from bio-treated dyeing wastewater." In 2017 6th International Conference on Energy and Environmental Protection (ICEEP 2017). Paris, France: Atlantis Press, 2017. http://dx.doi.org/10.2991/iceep-17.2017.100.

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Jasper, Anthony, George Sorial, Rajib Sinha, Radha Krishnan, and Craig L. Patterson. "Impact of Nanoparticles on the Removal of Organic Pollutants by Activated Carbon Adsorption." In World Environmental and Water Resources Congress 2008. Reston, VA: American Society of Civil Engineers, 2008. http://dx.doi.org/10.1061/40976(316)122.

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Chiriac, Florentina Laura, Vasile Iancu, Alina Tatarus, Ionut Cristea, Valentina Andreea Petre, Carol Blaziu Lehr, Ioana Alexandra Ionescu, and Roxana Elena Scutariu. "ADSORPTION OF ORGANIC POLLUTANT ON MICROPLASTIC PARTICLES." In International Symposium "The Environment and the Industry". National Research and Development institute for Industrial Ecology, 2021. http://dx.doi.org/10.21698/simi.2021.ab18.

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6

Vu, Trinh, Highqueen Sarpomah, Michael Kamen, Tolessa Deksissa, and Jiajun Xu. "Nanoparticles Infused Mesoporous Material for Water Treatment Processes." In ASME 2017 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/imece2017-70475.

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In current study, a hybrid mesoporous material infused with metallic oxide nanoparticles, MCM-48 with TiO2 nanoparticles, has been developed for potential application in water treatment. Using this unique hybrid structure, it can combine the advantages of the effective pollutants removal capability of metallic oxide nanoparticles, and the strong yet high permeable structure of mesoporous material. A modified hydrothermal method has been developed to synthesize three hybrid samples with TiO2 nanoparticles of three assorted sizes (15, 50 and 300nm), and their structure have also been characterized. The synthesized samples are tested for its capability of removing organic dye and trace metals using ICP-MS. The results have shown that while all three hybrid materials have shown over 80% adsorption rate for organic dye, the sample synthesized using 300nm TiO2 nanoparticle has shown the highest adsorption rate. Similarly, the highest adsorption rate for most trace metals test here also occurs in the sample made with 300nm TiO2 nanoparticle. Coincidentally, the sample prepared with 300nm TiO2 nanoparticle has a much larger internal surface area and smaller average pore size compared to the two other samples, which may lead to the higher adsorption rate of trace metals and organic dye tested here. This study has presented a hybrid mesoporous material that can be potentially used for pollutants removal of water treatment. Future studies are still needed to fully explore this hybrid material and its capability in water treatment.
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Ribeiro, A., C. Vilarinho, J. Araújo, and J. Carvalho. "Development of an Integrated Process for Eggshell Valorization." In ASME 2014 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/imece2014-38836.

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The current global trend towards more stringent environmental standards, technical applicability and cost-effectiveness, became key factors in the selection of adsorbents. After demonstrating the performance of eggshell-derived adsorbent under a range of lab operating conditions, this work focused the adsorption efficiency of calcined eggshell powder (CEP), in the treatment of wastewaters from different industrial units. In order to do it, the removal of organic material, expressed as chemically oxygen demand (COD), was monitored in leachate wastewaters from sanitary landfill (LLWW) and in municipal residual wastewaters (MWW). Furthermore, the efficiency of alkaline metals removal, specifically from effluents of industrial unites from superficial treatments, was also assessed. A detailed study of the eggshell characteristics, before and after the adsorption process, was carried out, aiming at investigate the adsorption mechanism underlying the removal of different pollutants. Results demonstrate that adsorption of organic material and metals in the CEP, go around 84% of organic material removal in MWW and 81% in LLWW. Finally, a removal of 95% of aluminium (Al) from MWW, deriving from anodizing industrial plant, and a removal of 88% copper (Cu), 95% chromium (Cr) and 30% nickel (Ni) from effluents of superficial treatments produced in Ni/Cr plating plants, were also determined This suggests that CEP adsorbent is appropriated to wastewaters treatment with high contents of organic matter and heavy metals, from different aqueous systems or different industries. The application of this adsorbent in this methodology showed good cost-benefits ratio, proving that it can be an effective alternative to activated carbon. However, aiming the progress and sustainability of the whole eggshell valorisation, we are further optimizing, testing and developing new techniques and products to recover the organic fraction of the eggshell through the reclamation of several bioactive peptides derived from hydrolysis of different proteins that constitute these residues. These products are intended to be introduced in the food, cosmetic and pharmaceutical markets.
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Tadjarodi, Azadeh, Mohammad Salehi, Mina Imani, Samaneh Ebrahimi, and Raheleh Pardehkhorram. "Glycine Assisted Synthesis of ZnFe2O4 Nanoparticles by One Pot Microwave Heating Route and Organic Pollutant Adsorption for Water Treatment." In The 18th International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland: MDPI, 2014. http://dx.doi.org/10.3390/ecsoc-18-c004.

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Sandu, Alina Mirela. "PERSISTENT�ORGANIC�POLLUTANTS�IN�ROMANIA." In SGEM2012 12th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2012. http://dx.doi.org/10.5593/sgem2012/s20.v5082.

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Kononchuk, N., and I. Narkevich. "TECHNOLOGIES FOR PROCESSING PERSISTENT ORGANIC POLLUTANTS." In SAKHAROV READINGS 2020:ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. Minsk, ICC of Minfin, 2020. http://dx.doi.org/10.46646/sakh-2020-2-379-382.

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Звіти організацій з теми "Adsorption of organic pollutants"

1

Chefetz, Benny, Baoshan Xing, and Yona Chen. Interactions of engineered nanoparticles with dissolved organic matter (DOM) and organic contaminants in water. United States Department of Agriculture, January 2013. http://dx.doi.org/10.32747/2013.7699863.bard.

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Background: Engineered carbon nanotubes (CNTs) are expected to be increasingly released into the environment with the rapid increase in their production and use. The discharged CNTs may interact with coexisting contaminants and subsequently change environmental behaviors and ecological effects of both the CNTs themselves and the contaminants. Dissolved organic matter (DOM) plays a critical role in the transport of CNTs in the aquatic environment, affecting both CNT's surface properties through adsorption, and its colloidal stability in solution. Therefore, CNT-bound DOM complexes may interact with coexisting contaminants, thus affecting their environmental fate. With increasing production and use of CNTs, there is an increasing risk that humans could be exposed to CNTs mainly through ingestion and inhalation. Since CNTs can be carriers of contaminants due to their high adsorption affinity and capacity, the distribution of these nanoparticles in the environment holds a potential environmental and health risk. Project objectives: The overall goal of this project was to gain a better understanding of the environmental behavior of engineered nanoparticles with DOM and organic pollutant in aqueous systems. The scope of this study includes: characterizing various types of engineered nanoparticles and their interaction with DOM; binding studies of organic contaminants by nanoparticles and DOM-nanoparticle complexes; and examining interactions in DOM-nanoparticles-contaminant systems. Major conclusions, solutions and achievements: DOM has a pronounced effect on colloidal stability of CNTs in solution and on their surface chemistry and reactivity toward associated contaminants. The structure and chemical makeup of both CNTs and DOM determine their interactions and nature of formed complexes. CNTs, contaminants and DOM can co-occur in the aquatic environment. The occurrence of co-contaminants, as well as of co-introduction of DOM, was found to suppress the adsorption of organic contaminants to CNTs through both competition over adsorption sites and direct interactions in solution. Furthermore, the release of residual contaminants from CNTs could be enhanced by biomolecules found in the digestive as well as the respiratory tracts, thus increasing the bioaccessibility of adsorbed contaminants and possibly the overall toxicity of contaminant-associated CNTs. Contaminant desorption could be promoted by both solubilization and sorptive competition by biological surfactants. Scientific and agricultural implications: The information gained in the current project may assist in predicting the transport and fate of both CNTs and associated contaminants in the natural environment. Furthermore, the results imply a serious health risk from contaminant-associated CNTs.
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Schultz, P. G. Enzyme engineering for biodegradation of chlorinated organic pollutants. Office of Scientific and Technical Information (OSTI), June 1998. http://dx.doi.org/10.2172/13508.

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Greaney, Allison, Stephanie Bruffey, Nick Soelberg, and Amy Welty. Organic Iodide Adsorption from Dilute Gas Streams. Office of Scientific and Technical Information (OSTI), September 2021. http://dx.doi.org/10.2172/1831626.

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Ho, P. C. Organic geochemistry: Effects of organic components of shales on adsorption: Progress report. Office of Scientific and Technical Information (OSTI), November 1988. http://dx.doi.org/10.2172/6683415.

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Steven B. Hawthorne and Arnaud J. Lagadec. REMOVAL OF ORGANIC POLLUTANTS FROM SUBCRITICAL WATER WITH ACTIVATED CARBON. Office of Scientific and Technical Information (OSTI), August 1999. http://dx.doi.org/10.2172/778429.

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Fish, W., and C. D. Palmer. Adsorption of chromate/organic-acid mixtures in aquifer materials. Office of Scientific and Technical Information (OSTI), July 1991. http://dx.doi.org/10.2172/6063883.

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Blough, Neil V., and Daniel E. Falvey. Photochemical Sinks of Organic Pollutants in Estuarine and Near-Shore Environments. Fort Belvoir, VA: Defense Technical Information Center, September 2000. http://dx.doi.org/10.21236/ada609908.

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Blough, Neil V., and Daniel E. Falvey. Photochemical Sinks of Organic Pollutants in Estuarine and Near-Shore Environments. Fort Belvoir, VA: Defense Technical Information Center, August 2001. http://dx.doi.org/10.21236/ada628537.

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Blough, Neil V., and Daniel E. Falvey. Photochemical Sinks of Organic Pollutants in Estuarine and Near-Shore Environments. Fort Belvoir, VA: Defense Technical Information Center, September 1999. http://dx.doi.org/10.21236/ada629872.

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Author, Not Given. Origin and Fate of Organic Pollutants from the Combustion of Alternative Fuels. Office of Scientific and Technical Information (OSTI), June 1995. http://dx.doi.org/10.2172/72932.

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