Relevant bibliographies by topics / Sorption purification

Academic literature on the topic 'Sorption purification'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 May 2022

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Journal articles on the topic "Sorption purification"

Malyovannyi, Myroslav, Galina Sakalova, Natalia Chornomaz, and Oleh Nahurskyy. "Water Sorption Purification from Ammonium Pollution." Chemistry & Chemical Technology 7, no. 3 (September 25, 2013): 355–58. http://dx.doi.org/10.23939/chcht07.03.355.

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Voronov, A. A., S. V. Maksimova, and E. Yu Osipova. "Purification of urbanized melt water with plant sorbents." Vestnik Tomskogo gosudarstvennogo arkhitekturno-stroitel'nogo universiteta. JOURNAL of Construction and Architecture 23, no. 2 (April 30, 2021): 105–17. http://dx.doi.org/10.31675/1607-1859-2021-23-2-105-117.

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The article deals with the problem of purification of melt water generated by the urbanized territories. It is proposed to use wood residue from sawing of plantings to obtain relatively inexpensive sorption material for the contamination extraction from surface wastewater. The aim of this work is to study the sorption properties of the material obtained by sawing of plantings. Experimental modeling of sorption of dissolved petroleum products and copper ions from an aqueous solution of milled branches of black poplar is carried out under static conditions. The sorption process is studied in accordance with a three-factor design experiment. Laboratory modeling determines the optimum parameters of water purification and the degree of mutual influence of contaminants on the sorption process. Natural material obtained from the poplar components shows the sorption properties in relation to oil products and copper ions in the water environment. The filters made of milled branches and used in local treatment plants will allow solving the problems of municipal services, namely utilization of wood residue from sawing of plantings and effective melt water purification due to the low-cost filtering materials.

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Siziakova, Ekaterina, Pavel Ivanov, and Regina Maximova. "Feasibility of Applying Alkaline-Earth Metal Carboaluminates for Bayer Process Aluminate Solution Purification from Organic Impurities." Materials Science Forum 1031 (May 2021): 109–16. http://dx.doi.org/10.4028/www.scientific.net/msf.1031.109.

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The article is devoted to the problems of aluminate solutions sorption purification from harmful organic impurities in the production of alumina from the Bayer experiment. The study of sorption of basic classes of organic impurities isolated from industrial aluminate solutions showed that magnesium and calcium hydrocarboaluminates have a high selectivity in relation to the most harmful classes of organic substances for the process. The results of the sorption process kinetics and thermodynamics studies are given, optimal technological parameters of sorption purification and conditions for the synthesis of active sorbents from alkaline aluminate solutions and activated magnesium and calcium raw materials are determined.

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Fomenko, A. I., and L. I. Sokolov. "Use of Ashes from Thermal Power Plants for Effluents Treatment." Ecology and Industry of Russia 26, no. 1 (January 12, 2022): 14–18. http://dx.doi.org/10.18412/1816-0395-2022-1-14-18.

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The results of the aqueous liquids purification by sorption from various impurities by using ashes as sorbent resulting from the solid-fuel combustion (wood processing waste, coal) are presented. Sorption kinetic dependences have been studied, sorption characteristics of concerned ash samples relative to iron and phosphate counter-ions in aqueous liquids have been determined. Purification and sorption capacity values of concerned ash samples relative to ions extracted from aqueous liquids have been calculated. High efficiency of iron ion extraction from aqueous liquids by bypassing-products wihout any additional reagent has been discovered. Wood ash is a promising sorbent for phosphate ions.

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Lodins, Edmunds, Inga Pudze, Ineta Rozenstrauha, and Linda Krage. "Use of Industrial Waste and Raw Materials in Iron Sorption." Key Engineering Materials 721 (December 2016): 154–58. http://dx.doi.org/10.4028/www.scientific.net/kem.721.154.

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This work focuses on pellets made by Latvian industrial waste (waste cullet glass, sewage sludge, metallurgical slag and alumina scrap metal processing waste and raw mineral materials (limeless clay) to gain high porosity and water sorptiom. Iron sorption using ceramic pellets is explored more detailed. Physical-chemical properties and microstructure were researched to obtain a deeper understanding of how these qualities affect water purification from iron compounds. Three pellets with different properties were made in this paper : B5, A5 and E1. Composition B5 indicates highest iron sorption rate at sintering temperature 1100 °C and shows considerable iron reduction in a solution after one week.

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Kuznetsova, N. P., R. N. Mishaeva, and L. R. Gudkin. "Sorption purification of concentrated hemoglobin solutions." Russian Journal of Applied Chemistry 80, no. 9 (September 2007): 1598–603. http://dx.doi.org/10.1134/s1070427207090303.

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Обуздина, Marina Obuzdina, Руш, E. Rush, Шалунц, and L. Shalunc. "Sorption Purification of Effluent Water From Heavy Metal Ions by Modified Natural Zeolites." Safety in Technosphere 6, no. 2 (August 21, 2017): 56–61. http://dx.doi.org/10.12737/article_598d7af88ce043.55438902.

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Features of sorption method of effluent water purification are considered. Analysis of technologies of effluent water purification from heavy metalsionsis presented. Physico-chemical regularities of sorption of Zn, Ni, Cu ions are investigated. As sorbents it is proposed to use zeolites of Holinsky deposits, modified by sulfur polymer, obtained from waste of epichlorohydrin production. This will allow simultaneously solving two problems: elimination of waste and wastewater purification, which is significantly advantageous from the economic point of view. Kinetic curves of sorption of Zn, Ni, Cu ions in different solution concentrations are presented. Also the adsorption process of heavy metal ions from solutions of chemically modified zeolites in the evaluation of the influence of various factors (the contact time of sorbent with solution, pH and temperature) are investigated.

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Rusdiarso, Bambang, Rahmat Basuki, and Sri Juari Santosa. "Evaluation of Lagergren Kinetics Equation by Using Novel Kinetics Expression of Sorption of Zn²⁺ onto Horse Dung Humic Acid (HD-HA)." Indonesian Journal of Chemistry 16, no. 3 (March 12, 2018): 338. http://dx.doi.org/10.22146/ijc.21151.

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Extraction and purification of humic acid from dry horse dung powder (HD-HA) was performed successfully and the purified HD-HA was then applied as sorbent to adsorb Zn2+. Extraction and purification were performed based on procedure of Stevenson (1994) under atmospheric air. Parameters investigated in this work consist of effect of medium sorption acidity, sorption rate (ka) and desorption rate constant (kd), Langmuir (monolayer) and Freundlich (multilayer) sorption capacities, and energy (E) of sorption. The ka and kd were determined according to the kinetic model of second order sorption reaching equilibrium, monolayer sorption capacity (b) and energy (E) were determined according to Langmuir isotherm model, and multilayer sorption capacity (B) was determined based on Freundlich isotherm model. Sorption of Zn2+ on purified HD-HA was maximum at pH 5.0. The novel kinetic expression resulted from proposed kinetic model has been shown to be more applicable than the commonly known Lagergren equation obtained from the pseudo-first order sorption model. The application of the equation revealed that the intercept of Lagergren equation, ln qe was more complex function of initial concentration of Zn2+ (a), Langmuir sorption capacity (b), and sorbed Zn2+ at equilibrium (xe).

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Grachek, V. I., A. A. Shunkevich, A. P. Polikarpov, and O. I. Isakovich. "Sorption properties of new fibrous chelate ion exchanger." Proceedings of the National Academy of Sciences of Belarus, Chemical Series 56, no. 2 (June 7, 2020): 206–11. http://dx.doi.org/10.29235/1561-8331-2020-56-2-206-211.

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The sorption properties of new iminodiacetate fibrous cation exchanger FIBAN XC-1 synthesized on a chemically resistant matrix of polypropylene fiber with a grafted copolymer of styrene and divinylbenzene, which can withstand elevated temperatures and aggressive environments, were studied. It was shown that the fibrous chelate ion exchanger FIBAN XC-1 is an effective sorbent of heavy and non-ferrous metals from multi-ionic aqueous solutions under static and dynamic conditions. It was found that the cation exchanger operates at high speeds up to 20 column volumes / min in water purification from copper and lead ions (purification from Cu2+ – 82 % and purification from Pb2+– 65 %). It was found that the fibrous chelate ion exchanger FIBAN XC-1 is easily regenerated and does not lose its sorption and mechanical properties in the sorption– regeneration cycles.

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Umirova, Nilufar. "Use of glauconite as a non-reagent sorbent for the softening of drinking and boiler waters, industrial waste water." E3S Web of Conferences 216 (2020): 01147. http://dx.doi.org/10.1051/e3sconf/202021601147.

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The article discusses the sorption of purification of water bodies from impurities using natural inorganic sorbents. The availability and low cost of minerals are an important economic advantage of their use for the purification of all types of water. The article describes a method of using an effective sorbent with high ion-exchange and sorption properties for purification of light oil products, for the purification of drinking or industrial water with a high content of heave technogenic metal ions and organic substances. Based on the data obtained, conclusions are drawn about the possibility of using the studied natural mineral sorbents for the extraction of impurities from waste and natural waters.

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Dissertations / Theses on the topic "Sorption purification"

Benzouaa, Rachid. "Purification de l'hexafluorure d'uranium." Thesis, Clermont-Ferrand 2, 2014. http://www.theses.fr/2014CLF22433.

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L’hexafluorure d’uranium (UF6), est le seul composé utilisé à l’état gazeux dans les procédés d’enrichissement pour la production du combustible nucléaire. Pour le bon déroulement de l’étape d’enrichissement, la qualité de UF6 est primordiale. Cette étude s’est intéressée principalement aux impuretés volatiles sous forme de fluorures et oxyfluorures et leur réactivité avec des matériaux en présence ou non de l’UF6. La nature des produits adsorbés et de réactions a été identifiée. Les mécanismes physico-chimiques mis en jeux lors de la sorption ont été investigués. Les performances (capacité de sorption, sélectivité et régénération) de ces matériaux absorbants et adsorbants ont été évaluées en vue de leur utilisation comme filtre UF6 dans les usines de conversion
Uranium hexafluoride (UF6), is the only compound used in the gaseous state in the process of enrichment to produce nuclear fuel. For the success of the enrichment step, the UF6 quality is paramount. This study is mainly concerned with volatile impurities in form of fluorides and oxyfluorides and their reactivity with the materials in presence or not of UF6. The nature of the adsorbed compounds and reactions products was identified. The physico-chemical mechanisms of sorption were investigated. The performances (sorption capacity, selectivity and regeneration) of the absorbent and adsorbent materials have been evaluated to be used as UF6 filters in conversion plants

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Roche, Iain. "Nanoporous polymeric adsorbents for blood purification." Thesis, Loughborough University, 2009. https://dspace.lboro.ac.uk/2134/8143.

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This thesis is concerned with applying engineering principles to the use of polymeric nanoporous adsorbents for use in blood purification to obtain original knowledge. Styrene divinylbenzene copolymer nanoporous adsorbents offer a potential means to remove middle molecular (MM) sized molecules when in direct contact with blood. (Continues...).

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Hawley, Harmonie A. "TCE removal utilizing coupled zeolite sorption and advanced oxidation." Link to electronic thesis, 2003. http://www.wpi.edu/Pubs/ETD/Available/etd-0428103-150434.

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Phillips, Patrick. "Design improvements to the batch demulsification and sorption equipment for pesticide rinsate disposal." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06112009-063429/.

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Forrest, Katherine A. "Understanding Gas Sorption Mechanisms in Metal–Organic Materials via Computational Experimentation." Scholar Commons, 2017. http://scholarcommons.usf.edu/etd/7023.

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Metal–organic materials (MOMs), a type of porous crystalline structure composed of organic ligands jointed with metal ions, have captured the interest of scientists as potentially useful in gas sorption applications. Some of the most crucial avenues of investigation are in H2 storage (for use as a clean burning fuel source) and CO2 capture and sequestration (to remove the greenhouse gas from the environment). A major advantage of MOMs for such applications is their high variability in terms of physical dimensions and chemical moieties, based on composition and synthesis conditions, making them potentially customizable for specific application if necessary structural characteristics are known. Computational experimentation is an important avenue for determining such specifications as it allows examination of gas/MOM interaction at the molecular level. In this dissertation a number of MOM structure are computationally studied in order to elucidate gas sorption mechanisms. These systems were probed by classical simulation using grand canonical Monte Carlo with a carefully chosen set of intermolecular interaction parameters. While the focus of this work is specifically H2 and CO2 sorptive behavior, the insights gained from simulation extend beyond these specific applications. Addressed first are a series of MOMs with rht topology, which possesses asymmetric copper paddle-wheels and easily functionalized linkers. Beginning with a prototypical structure and then branching out into more chemically interesting variants revealed surprising gas sorption behavior about the metal paddle-wheels (with a definite preference for one copper over its counterpart). A synthetic strategy for controlling the preferred open-metal sorption site through the inclusion of electron rich functionality in the linker bodies, was also revealed. An additional MOM with similar composition components, exhibiting zyg topology, also showed this metal preference effect on the asymmetric paddle-wheels. A second class of MOMs, composed of square-pillared grids and known as the SIFSIX series (due to the inclusion of SiF62− as pillaring units) was also examined. These structures have been shown excellent results for CO2 sorption making the elucidation of the sorptive mechanisms of great interest. Six different structures were examined, probing the effects of linker length, metal selection, and interpenitration of unbonded scaffolds. The nature of the CO2-MOM sorption interactions were revealed through simulation and provided insights regarding the synergistic effect of pore dimensions and SiF62− functionality for specifying specific behavior (i.e. high selectivity vs. high uptake). A final MOM, composed of Y3+ ions and chemically complex linkers, was also examined. Disorder in the crystallographic data (e.g. single atoms with multiple positions) indicated the coexistance of notably different unit cells in the same system. Nevertheless, simulations revealed favored sorption sites in conjunction with results from physical experimentation.

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Srđan, Kovačević. "Analiza samoprečišćavajućeg potencijala podzemnih voda za uklanjanje farmaceutika primenom metode rečne obalske filtracije." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=105041&source=NDLTD&language=en.

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Osnovni cilj istraživanja u okviru doktorske disertacije je definisanjekriterijuma na osnovu optimizacije usvojenog stepena sorbiranja idegradacije za modele transporta farmaceutika u aluvijalnim podzemnimvodama, koji služe kao polazna osnova za postavke budućih izvorištapodzemne vode. Dobijeni su novi podaci i informacije koje će se koristiti zaprocenu ponašanja farmaceutika, kao i za projektovanje i optimizaciju novihsistema za efikasnu zaštitu i upravljanje podzemnim vodama. Potpuno novirezultati se odnose na određivanje stepena eliminacije farmaceutika tokomprimene metode rečne obalske filtracije, kao i teorijsko i eksperimentalnopoređenje realnih podataka o stepenu sorbiranja i razgradnje farmaceutika.
The main goal of dissertation is to define new criteria based on theoptimization of applied sorption and degradation degree for groundwaterpharmaceuticals transport model, which serve as a basis for developmentand design of the future drinking water facilities. New data and information’sare obtained and can be used for assessment of pharmaceutical behavior inalluvial groundwater and for design of new and innovative systems for moreefficient protection and groundwater management. Novel results are referredon the determination of the pharmaceuticals elimination during river bankfiltration and on the theoretical and experimental comparison of real data forthe sorption and degradation capacity of selected pharmaceuticals.

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Baillet, Francis. "Evaluation des capacités de biosorption de la bactérie Thiobacillus ferrooxidans et application à la conception d'un procédé de traitement d'effluent contenant des métaux lourds : cas du cadmium et du chrome." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0151.

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Le travail presente dans ce memoire traite de l'utilisation de la bacterie acidophile thiobacillus ferrooxidans pour la biosoption des metaux toxiques contenus dans les effluents industriels et la mise au point d'un procede de traitement d'effluent utilisant cette bacterie. Les proprietes de resistance et de biosorption de t. Ferrooxidans vis-a-vis du cadmium et du chrome sont etudiees. Les resultats montrent que la souche bacterienne utilisee (dsm 583) resiste et s'adapte a de fortes concentrations en metaux et que d'importantes quantites de metal sont fixees (respectivement 0. 2 g de cd#2#+ et 0. 5 g de cr#6#+ par gramme de biomasse seche). Des cliches realises par microscopie electronique a transmission permettent d'observer des precipites a la surface des bacteries indiquant un mecanisme de bioprecipitation des metaux. Cette hypothese est confirmee par des tests d'elution des metaux fixes et la mise au point d'un modele empirique, par la methodologie des plans d'experiences, de la biosorption des metaux en fonction de cinq parametres (temperature, ph, vitesse d'agitation, concentration et etat physiologique de la biomasse). L'optimisation du modele empirique conduit a des quantites fixees superieures a 1g/g de biomasse seche et montre des differences dans les conditions optimales de biosorption suivant le metal etudie. Un procede de traitement d'effluent utilisant t. Ferrooxidans est alors propose et la production de la biomasse necessaire a ce procede particulierement etudiee. Un reacteur electrochimique de regeneration du substrat de la bacterie est concu et realise et permet de produire 3 a 5 fois plus de biomasse qu'une culture classique sans regeneration. La regeneration du milieu de culture est ensuite commandee par un regulateur automatique non lineaire ce qui permet d'obtenir de fortes concentrations en bacteries dans l'etat physiologique desire et d'envisager la mise au point d'un pilote de traitement d'effluent continu et selectif quant aux metaux elimines

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Cioce, Christian R. "Computational Investigations of Potential Energy Function Development for Metal-Organic Framework Simulations, Metal Carbenes, and Chemical Warfare Agents." Scholar Commons, 2015. http://scholarcommons.usf.edu/etd/5666.

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Metal-Organic Frameworks (MOFs) are three-dimensional porous nanomaterials with a variety of applications, including catalysis, gas storage and separation, and sustainable energy. Their potential as air filtration systems is of interest for designer carbon capture materials. The chemical constituents (i.e. organic ligands) can be functionalized to create rationally designed CO2 sequestration platforms, for example. Hardware and software alike at the bleeding edge of supercomputing are utilized for designing first principles-based molecular models for the simulation of gas sorption in these frameworks. The classical potentials developed herein are named PHAST -- Potentials with High Accuracy, Speed, and Transferability, and thus are designed via a "bottom-up" approach. Specifically, models for N2 and CH4 are constructed and presented. Extensive verification and validation leads to insights and range of applicability. Through this experience, the PHAST models are improved upon further to be more applicable in heterogeneous environments. Given this, the models are applied to reproducing high level ab initio energies for gas sorption trajectories of helium atoms in a variety of rare-gas clusters, the geometries of which being representative of sorption-like environments commonly encountered in a porous nanomaterial. This work seeks to push forward the state of classical and first principles materials modeling. Additionally, the characterization of a new type of tunable radical metal--carbene is presented. Here, a cobalt(II)--porphyrin complex, [Co(Por)], was investigated to understand its role as an effective catalyst in stereoselective cyclopropanation of a diazoacetate reagent. Density functional theory along with natural bond order analysis and charge decomposition analysis gave insight into the electronics of the catalytic intermediate. The bonding pattern unveiled a new class of radical metal--carbene complex, with a doublet cobalt into which a triplet carbene sigma donates, and subsequent back-bonding occurs into a pi* antibonding orbital. This is a different type of interaction not seen in the three existing classes of metal-carbene complexes, namely Fischer, Schrock, and Grubbs. Finally, the virtual engineering of enhanced chemical warfare agent (CWA) detection systems is discussed. As part of a U.S. Department of Defense supported research project, in silico chemical modifications to a previously synthesized zinc-porphyrin, ZnCS1, were made to attempt to achieve preferential binding of the nerve agent sarin versus its simulant, DIMP (diisopropyl methylphosphonate). Upon modification, a combination of steric effects and induced hydrogen bonding allowed for the selective binding of sarin. The success of this work demonstrates the role that high performance computing can play in national security research, without the associated costs and high security required for experimentation.

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Franz, Douglas M. "Simulation and Software Development to Understand Interactions of Guest Molecules inPorous Materials." Scholar Commons, 2019. https://scholarcommons.usf.edu/etd/7788.

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The effect of inclusion of explicit polarization is investigated through several theoret- ical studies of crystalline porous materials herein. In addition to the use of Monte Carlo simulation for such studies, a robust molecular dynamics software is presented which is suitable for analyzing time dependent properties of gases or other molecules in porous materials and other condensed phase systems. Metal-organic frameworks (MOFs) are the main focus of the work included here, a relatively young class of materials originally in- troduced in the early 1990s. These are usually three dimensional crystalline nanoporous materials that exhibit unique properties such as gas separation, storage and catalysis. They are synthesized by the combination of a metal ion e.g. Cu2+ with an organic linker e.g. benzene dicarboxylate. They are a very popular topic of scientific research due to the diversity in possible structures and manifold utility – finding applications in electron transfer, sensing, drug release etc. Industrially, MOFs like HKUST-1 and others are on the global market for use in gas storage and separation in fuel cell and raw materials processing. These materials are often ideal candidates for computer simulation owing to their crystalline nature – a very large atomic system (that is, moles of particles) can be under- stood by only evaluating one or a few unit cells of the MOF, usually less than 5,000 atoms, and macroscopic properties such as gas sorption capacity and diffusion coefficients can be calculated through extrapolation of atomistic interactions in a mathematically infinite lattice. The software developed by the space group as of 2005, Massively Parallel Monte Carlo (MPMC), allows for sophisticated calculation of repulsion dispersion, electrostatic and polarization energies. In this work, Monte Carlo Molecular Dynamics (MCMD) is in- troduced, which can hybridize both methods to explore the phase space of a system with ease and better efficiency, as well as explore the effects of MOF flexibility and dynamic properties which to-date are rarely studied. Studies involving primarily CO2, H2 and CH4 will be presented, but other gases investigated include C2 H2 , C2 H4 , C2 H6 , N2 , H2 O and others. Metal-organic materials with a wide variety of composition and structure will also be presented. Finally, features of the software MCMD will be presented for use by future studies.

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Літинська, Марта Ігорівна. "Видалення сполук арсену та гуматів з водного середовища." Doctoral thesis, Київ, 2021. https://ela.kpi.ua/handle/123456789/40411.

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Дисертаційна робота присвячена розробці та науковому обгрунтуванню методу для ефективного видалення сполук арсену різних ступенів окиснення та гуматів з природних вод. В дисертації теоретично (на основі літературних даних та розрахунків) та експериментально (в результаті сорбційних досліджень) обгрунтовано вибір сполук феруму, як основного сорбуючого компоненту для видалення сполук арсену з водного середовища. Різними способами (гетерогенне осадження, гомогенне осадження, гідротермальний метод) синтезовано ряд ферумвмісних сорбційних матеріалів, серед яких порошкові, зернисті на основі активованого вугілля та суспензійні сорбенти. Визначено, що використання комбінації «дрібнодисперсний ферум(ІІІ) оксигідроксид/мембрана» дозволяє вилучати сполуки арсену з модельних та підземних вод до санітарних вимог за вихідних концентрацій арсену 500-16733 мкг/дм3 та відділяти відпрацьований дрібнодисперсний ферумвмісний сорбент від води і захищає мембрани від засмічування.

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Books on the topic "Sorption purification"

Volesky, Bohumil. Sorption and biosorption. St. Lambert, Québec: BV Sorbex, 2003.

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Countercurrent sorption equipment using transported open sorbent material. Delft, The Netherlands: Delft University Press, 1997.

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Walton, Harold F. Sorption properties of model compounds on C 18 adsorbents. Research Triangle Park, NC: U.S. Environmental Protection Agency, Health Effects Research Laboratory, 1985.

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Walton, Harold F. Sorption properties of model compounds on C 18 adsorbents. Research Triangle Park, NC: U.S. Environmental Protection Agency, Health Effects Research Laboratory, 1985.

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Zee, Gerard van. Counter current sorption using fiber sorbents: A novel separation technique for water purification in power and space efficient equipment. Delft, Netherlands: Delft University Press, 1996.

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Zee, Gerrard Van. Counter Current Sorption Using Fiber Sorbents: A Novel Separation Technique for Water Purification in Power & Space Efficient Equipment. Delft Univ Pr, 1996.

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Fortschritte bei der thermischen, katalytischen und sorptiven Abgasreinigung: Kolloquium Mannheim, 1. und 2. März 1989. Düsseldorf: VDI-Verlag, 1989.

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Book chapters on the topic "Sorption purification"

Starostina, I. V., D. O. Polovneva, Yu L. Makridina, and L. V. Denisova. "Application of Carbon-Containing Sorption Material for Wastewater Purification from Methylene Blue Dye." In Lecture Notes in Civil Engineering, 269–76. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-75182-1_36.

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Sapronova, Zh A., I. V. Starostina, and I. V. Bomba. "Purification of Model Waters from the CONGO Red Dye with Organomineral Sorption Material Based on Sludge Waste." In Lecture Notes in Civil Engineering, 273–78. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68984-1_40.

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Sapronova, Zh A., A. V. Svyatchenko, I. V. Bomba, and V. S. Voropaev. "Thermal Modification and Combination of Organo-Mineral Wastes for Sorption Purification of Test Solutions from Congo Red and Methylene Blue Dyes." In Lecture Notes in Civil Engineering, 225–31. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-81289-8_29.

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de Sá, Arsénio, Ana S. Abreu, Isabel Moura, and Ana Vera Machado. "Polymeric materials for metal sorption from hydric resources." In Water Purification, 289–322. Elsevier, 2017. http://dx.doi.org/10.1016/b978-0-12-804300-4.00008-3.

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Shikuku, Victor O., Chispin O. Kowenje, and Wilfrida N. Nyairo. "Fundamentals and Sources of Magnetic Nanocomposites and Their Sorption Properties." In Research Anthology on Synthesis, Characterization, and Applications of Nanomaterials, 636–55. IGI Global, 2021. http://dx.doi.org/10.4018/978-1-7998-8591-7.ch028.

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Over the years, adsorption has been the most widely applied technique for pollutants remediation in conventional water and wastewater treatment regimes with commendable results. Consequently, multiple adsorbents have been synthesized, characterized and tested for various pollutants sequestration such as; heavy metals, dyes, pharmaceutically active ingredients, among others, in aqueous media. Unfortunately, most of the sorbents face many inherent limitations such as high production cost, difficult separation of adsorbent from solution, and complex synthesis processes. Therefore, an efficient adsorbent that would be sustainably adopted for industrial application in wastewater treatment requires, among other properties, a simple and efficient recovery step from a continuous flowing system. The regenerated adsorbent must also possess near original properties after several cycles of reuse thereby resulting to low capital investment. To address this challenge, studies conducted in the past few years incorporating magnetism in both natural and synthetic sorbents to improve their removal from water via magnetic separation have yielded stupendous results compared to conventional technologies. This chapter concisely discusses synthesis methods and adsorption capacities and mechanisms of selected magnetic nanocomposite adsorbents under diverse physicochemical conditions for removal of cations, dyes and organic pollutants from wastewater. Magnetic nanocomposites present eco-friendly properties and are potential alternatives for application in water purification processes subject to commercial viability evaluation before practical use.

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Mitchenko, Tatyana, Paul Stender, and Natalya Makarova. "Optimization Of Sorption Purification Of Industrial Effluents, Waste Waters And Technological Solutions From Polyvalent Metal Ions." In Ion Exchange. CRC Press, 1999. http://dx.doi.org/10.1201/9780203908341.ch2.

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Conference papers on the topic "Sorption purification"

Ilin, Vadim A., Yury V. Karlin, Sergey A. Dmitriev, Natalya G. Belyanina, and Vera Eu Makeeva. "Comparative Testing of New Sorbents for LRW Purification." In ASME 2003 9th International Conference on Radioactive Waste Management and Environmental Remediation. ASMEDC, 2003. http://dx.doi.org/10.1115/icem2003-4537.

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Sorption of radionuclides from various liquid radioactive wastes (LRW) is almost a traditional method, which is usually applied while developing technologies for LRW purification. There are a great number of sorbents of different kind and sorption properties, but research in developing new types of sorbents with high functional properties is still in actual state. Especially it is very important for LRW purifying technologies, which apply sorption-membrane scheme of purification. This paper is devoted to the comparative testing of new sorbents (biosorbent, fitosorbent, modified natural zeolite, and synthetic sorbent on the base of barium sulfate and some others). The aim of this testing is to determine the main properties of new sorbents and to compare them with some well-known and industrially applied ones, for example, ion exchange resins, natural zeolites and some others. All the experiments were conducted with applying real LRW and namely, radioactive evaporation bottoms from Physical Energy Institute of Obninsk town (Kaluga region) and radioactive aqueous solution from near-surface solid radioactive waste (SRW) repository drainage system of Zagorsk (Sergiev Posad town of Moscow region) branch of Moscow SIA “Radon”. Distribution coefficients of some α-, β-, γ- radionuclides at sorption in static and dynamic conditions were obtained for studied sorbents. Conclusions and some recommendations on applying the studied sorbents have been done.

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Raiskaya, E. A., I. S. Sabko, O. I. Krivonos, and O. B. Belskaya. "Sorption properties of cellular carbon foam at water surface purification from petroleum products." In 21ST CENTURY: CHEMISTRY TO LIFE. AIP Publishing, 2019. http://dx.doi.org/10.1063/1.5122934.

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Ilin, V., Yu Karlin, A. Laurson, Eu Volkov, and S. Dmitriev. "Possible Approach to Cleaning “Problematic” LRW With Large Contents of Suspended Particles, Oils and Other Organic Substances." In The 11th International Conference on Environmental Remediation and Radioactive Waste Management. ASMEDC, 2007. http://dx.doi.org/10.1115/icem2007-7146.

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A general structural scheme for cleaning “problematic” liquid radioactive wastes (LRW) containing a large amount of suspended particles, oils and other organic substances has been proposed. The technological scheme includes two main stages: 1) separation of suspended particles, oil product emulsions and the larger part of colloidal particles from LRW by filtration, 2) purification of radioactive waters from radionuclides by membrane-sorption to the levels of radiation safety norms applied. The filtration stage is considered as a three-step process of “problematic” LRW treatment including: 1) “problematic” LRW extraction from storage tanks with a robot type device intended for washing out the bottom sediment (slurry), 2) separation of suspended particles, oil product emulsions and larger part of colloidal particles from LRW by filtration through porous or gauze diaphragms of 0.1 to 10 μm pores (cells) in size, 3) concentration of separated slurry up to 100–200 g/l. Two main options of the membrane-sorption technologies, AQUA-EXPRESS and Reverse Osmosis, for LRW purification have been considered. Two possible options of porous or gauze diaphragms productivity and lifetime increase between their surface regenerations have been shown: 1) possibility of an oxidizer introduction into initial LRW, 2) possibility to rotate a filtering element (disk or cylinder type).

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URBANAS, David, and Liudmyla MELNYK. "DESIGN OF THE REGENERATION METHOD OF HYDROXYL-CONTAINING ZIRCONIUM COMPOUNDS IN PROCESSES OF WATER PURIFICATION FROM BORON." In Conference for Junior Researchers „Science – Future of Lithuania“. VGTU Technika, 2017. http://dx.doi.org/10.3846/aainz.2017.020.

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The regeneration method of zirconium hydroxide sorbent spent in the boron sorption process by diluted solution of acids as well as the principle recycling diagram of the formed regenerating solution by the nanofiltration process with the OPMN-P membrane were proposedin this work. The permeate obtained can be used as a boron-containing microfertilizer (ammonium salt + boron) after it has been neutralised with ammonium hydroxide. Zirconium-containing concentrate may be reused for sorbent preparation. The effectiveness of separation of the regenerating solution components by nanofiltration is demonstrated by high values of zirconium rejection coefficient in this process (RZr ~98– 99%) and low values of boron rejection coefficient (RB ~12%). In this case the specific performance of the membrane is about 50 dm3/m2·h.

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BASTIENĖ, Nijolė, and Valerijus GASIŪNAS. "COMPARATIVE EVALUATION OF DITCH FILTERS WITH PHOSPHORUS SORBING CALCIUM BASED FILTER MATERIALS." In Rural Development 2015. Aleksandras Stulginskis University, 2015. http://dx.doi.org/10.15544/rd.2015.049.

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The aim of this paper was to evaluate the sorption capacity of calcium based filter materials (Polonite, Filtralite P and Hyttsand) under Lithuanian conditions. The results obtained from 16 months long ditch filters investigations showed that the efficiency of tested filter materials varies from 60 to 30 % on the average. The filter material Polonite was distinguished by highest reduction capacity of phosphorus, slightly less reduction was determined using Hyttsand and the least using Filtralite-P. The monitoring results confirmed that ditch filters have some ability to the retention of phosphorus and water purification. In total, ditch filters adsorbed about 96–208 g total phosphorus (TP) and 20–124 g phosphate phosphorus (PO4-P) during the reporting period (January 2013 – May 2014).

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Korsgaard, Anders Risum, Mads Pagh Nielsen, Mads Bang, and So̸ren Knudsen Kær. "Modeling of CO Influence in PBI Electrolyte PEM Fuel Cells." In ASME 2006 4th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2006. http://dx.doi.org/10.1115/fuelcell2006-97214.

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In most PEM fuel cell MEA’s Nafion is used as electrolyte material due to its excellent proton conductivity at low temperatures. However, Nafion needs to be fully hydrated in order to conduct protons. This means that the cell temperature cannot surpass the boiling temperature of water and further this poses great challenges regarding water management in the cells. When operating fuel cell stacks on reformate gas, carbon monoxide (CO) content in the gas is unavoidable. The highest tolerable amount of CO is between 50–100 ppm with CO-tolerant catalysts. To achieve such low CO-concentration, extensive gas purification is necessary; typically shift reactors and preferential oxidation. The surface adsorption and desorption is strongly dependent upon the cell temperature. Higher temperature operation favors the CO-desorption and increases cell performance due to faster kinetics. High temperature polymer electrolyte fuel cells with PBI polymer electrolytes rather than Nafion can be operated at temperatures between 120–200°C. At such conditions, several percent CO in the gas is tolerable depending on the cell temperature. System complexity in the case of reformate operation is greatly reduced increasing the overall system performance since shift reactors and preferential oxidation can be left out. PBI-based MEA’s have proven long durability. The manufacturer PEMEAS have verified lifetimes above 25,000 hours. They are thus serious contenders to Nafion based fuel cell MEA’s. This paper provides a novel experimentally verified model of the CO sorption processes in PEM fuel cells with PBI membranes. The model uses a mechanistic approach to characterize the CO adsorption and desorption kinetics. A simplified model, describing cathode overpotential, was included to model the overall cell potential. Experimental tests were performed with CO-levels ranging from 0.1% to 10% and temperatures from 160–200°C. Both pure hydrogen as well as a reformate gas models were derived and the modeling results are in excellent agreement with the experiments.

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Reports on the topic "Sorption purification"

Lin, Haiqing, Mark Swihart, Jay Kniep, and Kunlei Liu. Sorption Enhanced Mixed Matrix Membranes for Hydrogen (H₂) Purification and Carbon Dioxide (CO₂) Capture. Office of Scientific and Technical Information (OSTI), March 2020. http://dx.doi.org/10.2172/1603097.

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Chefetz, Benny, Baoshan Xing, Leor Eshed-Williams, Tamara Polubesova, and Jason Unrine. DOM affected behavior of manufactured nanoparticles in soil-plant system. United States Department of Agriculture, January 2016. http://dx.doi.org/10.32747/2016.7604286.bard.

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The overall goal of this project was to elucidate the role of dissolved organic matter (DOM) in soil retention, bioavailability and plant uptake of silver and cerium oxide NPs. The environmental risks of manufactured nanoparticles (NPs) are attracting increasing attention from both industrial and scientific communities. These NPs have shown to be taken-up, translocated and bio- accumulated in plant edible parts. However, very little is known about the behavior of NPs in soil-plant system as affected by dissolved organic matter (DOM). Thus DOM effect on NPs behavior is critical to assessing the environmental fate and risks related to NP exposure. Carbon-based nanomaterials embedded with metal NPs demonstrate a great potential to serve as catalyst and disinfectors. Hence, synthesis of novel carbon-based nanocomposites and testing them in the environmentally relevant conditions (particularly in the DOM presence) is important for their implementation in water purification. Sorption of DOM on Ag-Ag₂S NPs, CeO₂ NPs and synthesized Ag-Fe₃O₄-carbon nanotubebifunctional composite has been studied. High DOM concentration (50mg/L) decreased the adsorptive and catalytic efficiencies of all synthesized NPs. Recyclable Ag-Fe₃O₄-carbon nanotube composite exhibited excellent catalytic and anti-bacterial action, providing complete reduction of common pollutants and inactivating gram-negative and gram-positive bacteria at environmentally relevant DOM concentrations (5-10 mg/L). Our composite material may be suitable for water purification ranging from natural to the industrial waste effluents. We also examined the role of maize (Zeamays L.)-derived root exudates (a form of DOM) and their components on the aggregation and dissolution of CuONPs in the rhizosphere. Root exudates (RE) significantly inhibited the aggregation of CuONPs regardless of ionic strength and electrolyte type. With RE, the critical coagulation concentration of CuONPs in NaCl shifted from 30 to 125 mM and the value in CaCl₂ shifted from 4 to 20 mM. This inhibition was correlated with molecular weight (MW) of RE fractions. Higher MW fraction (> 10 kDa) reduced the aggregation most. RE also significantly promoted the dissolution of CuONPs and lower MW fraction (< 3 kDa) RE mainly contributed to this process. Also, Cu accumulation in plant root tissues was significantly enhanced by RE. This study provides useful insights into the interactions between RE and CuONPs, which is of significance for the safe use of CuONPs-based antimicrobial products in agricultural production. Wheat root exudates (RE) had high reducing ability to convert Ag+ to nAg under light exposure. Photo-induced reduction of Ag+ to nAg in pristine RE was mainly attributed to the 0-3 kDa fraction. Quantification of the silver species change over time suggested that Cl⁻ played an important role in photoconversion of Ag+ to nAg through the formation and redox cycling of photoreactiveAgCl. Potential electron donors for the photoreduction of Ag+ were identified to be reducing sugars and organic acids of low MW. Meanwhile, the stabilization of the formed particles was controlled by both low (0-3 kDa) and high (>3 kDa) MW molecules. This work provides new information for the formation mechanism of metal nanoparticles mediated by RE, which may further our understanding of the biogeochemical cycling and toxicity of heavy metal ions in agricultural and environmental systems. Copper sulfide nanoparticles (CuSNPs) at 1:1 and 1:4 ratios of Cu and S were synthesized, and their respective antifungal efficacy was evaluated against the pathogenic activity of Gibberellafujikuroi(Bakanae disease) in rice (Oryza sativa). In a 2-d in vitro study, CuS decreased G. fujikuroiColony- Forming Units (CFU) compared to controls. In a greenhouse study, treating with CuSNPs at 50 mg/L at the seed stage significantly decreased disease incidence on rice while the commercial Cu-based pesticide Kocide 3000 had no impact on disease. Foliar-applied CuONPs and CuS (1:1) NPs decreased disease incidence by 30.0 and 32.5%, respectively, which outperformed CuS (1:4) NPs (15%) and Kocide 3000 (12.5%). CuS (1:4) NPs also modulated the shoot salicylic acid (SA) and Jasmonic acid (JA) production to enhance the plant defense mechanisms against G. fujikuroiinfection. These results are useful for improving the delivery efficiency of agrichemicals via nano-enabled strategies while minimizing their environmental impact, and advance our understanding of the defense mechanisms triggered by the NPs presence in plants.

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