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Showing 1 to 16 of 16 for “"Anion exchange resins"”.
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Treatment of Landfill leachates using anion exchange resins
… were conducted to evaluate the applicability of anion exchange resins to remove organic matter, UV quenching substance and organic nitrogen from landfill leachates. Leachate samples based on varying age and treatment methods were utilized. The anion exchange resins were found to work effectively …
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Passive detection of phosphorus in agricultural drainage waters using reactive hybrid anion exchange resins
… method. Accordingly, polystyrene and polyacrylic anion exchange resins with different functional groups (i.e., strong-base and weak-base) were selected from a large pool of adsorbents (e.g., anion exchange resins, calcium and magnesium oxides, hybrid anion exchange resins, layered double …
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UNDERSTANDING AND MODELING THE SORPTION ON ANION EXCHANGE RESINS USING POLY-PARAMETER LINEAR FREE-ENERGY RELATIONSHIPS AND PHASE CONVERSION
… developed a predictive model for the sorption of anionic organic contaminants from drinking water on three anion exchange resins: a strong polystyrenic (IRA-910), weak polystyrenic (IRA-96), and a strong polacrylic (A860). The model quantifies the individual mechanisms of sorption using …
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Sulfate removal from water produced during CO2 enhanced oil recovery, coal-bed methane recovery, and mining operations using anion exchange resins
… mining operations in the Illinois Basin using anion exchange resins. Equilibrium batch studies were conducted to compare commercially available strong base and weak base anion exchange resins of different type. Our results indicate that for optimal sulfate removal in high chloride solutions, …
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An investigation on the removal of escherichia coli by ion exchange resins
… to evaluate the ability of typical cation and anion exchange resins to remove Escherichia coli from water. The objective was to obtain a method of purifying slightly polluted, private well water supplies. The investigation consisted of passing water samples, inoculated with known concentrations …
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Thermodynamics and kinetics of ion-exchange in perchlorate-selective poly(vinylbenzyltrialkylammonium chloride) matrices
Perchlorate-selective ion-exchange fiber composites (IXFCs) based on an active resin-on-fiber architecture exhibit rapid exchange kinetics. Coatings consist of hydrophobic poly(vinylbenzyltrialkylammonium chloride) (PVBTC) matrices prepared by quaternization of a poly(vinylbenzyl chloride) …
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Studies on the recovery of useful chemicals from waste and secondary materials
… Chapter 4, the final chapter, describes ion exchange and reviews the practical application of anion exchange resins to the hydrometallurgical recovery of metals. This is followed by a review of the exchange resin poly-4-vinyl pyridine, and a study into the practical application of the resin …
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SUSTAINABLE CATALYSIS VIA IRON AND ZINC COMPLEXES: FROM TUNABLE METALLATE SYSTEMS TO PHOTOCHEMICAL REACTIVITY
… halide acting as a Lewis acid and free halide anions acting as nucleophiles. Immobilization of these metallates on anion exchange resins generated heterogeneous catalysts that combined high activity with ease of recovery and, in some cases, improved selectivity due to cooperative effects …
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Evaluation of hybrid treatment configurations of granular activated carbon and alternative adsorbents for per- and polyfluoroalkyl substances removal from surface water and groundwater
… like granular activated carbon (GAC) and anion-exchange resins have been used extensively, but often see diminished performance with “challenging” waters that contain competitive adsorbates such as dissolved organic matter (DOM) and/ or total dissolved solids (TDS). This study evaluated a …
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Fate and remediation of emerging organic contaminants in aquatic and soil environments
… was assessed using 14 commercially available ion-exchange (IX)/non-ionic resins and granular activated carbon (GAC). Among the selected adsorbents, anion exchange resins (AERs) exhibited significant adsorption of PFASs compared to cation exchange resins, non-ionic resins, and GAC regardless of the …
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Development of 18F radiochemistry for positron emission particle tracking (PEPT)
… (TFA) complex, and used for radiolabelling. The anion exchange resins Purolite A870 and A200 were investigated for their ability to exchange non-radioactive counter ions for the required species. Ion exchange techniques were used to label small phase-representative tracer particles (<1 mm …
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Effect of oxygen and carbon dioxide tensions on release of sugars from peanut roots under gnotobiotic conditions
… to reduce the volume, salt removal by cation and anion exchange resins, freeze-drying, thin-layer chromatography to separate and identify the various sugars, and densitometry to obtain the quantity of each sugar. Analysis of variance showed for all adjusted harvest valves no significant difference …
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Regulation of Volatile Fatty Acid Synthesis in Megasphaera Elsdenii and Hexanoic Acid Utilisation by Pseudomonas Putida
… recovery of the products by adsorption to anion exchange resins. Initially, Amberlite IRA-93 (weak base anion-exchange resin) and Amberlite IRA-400 (strong base anion-exchange resin) resins were tested for their ability to adsorb and desorb butyric and hexanoic acids from water and …
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Exploration of the thiosulphate process for the dissolution of gold from electronic waste and its recovery through ion-exchange
… system. Gold recovery using ion-exchange processes was investigated with the use of a medium-base (AuRIX®100) and two strong-base anion exchange resins (Purogold™ MTA5013SO4 and MTA5011SO4). The AuRIX®100 resin was specifically developed for and is currently used in the …
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Advancing wastewater valorization using anaerobic membrane bioreactors with bioaugmentation and ion-exchange, and bio-plastic production
… process incorporating bioaugmentation and ion-exchange resins, as well as bio-polymer recovery via mixed microbial culture (MMC) polyhydroxyalkanoate (PHA) production. The first study presented in this dissertation investigated the application of bioaugmentation in the acid-phase of a two-phase …
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Biogeoquímica del fósforo en el suelo: optimización de criterios para un uso agronómico eficiente y ambientalmente aceptable de un recurso no renovable
… scheme (NaOH +CB), (v) extraction with anion exchange resins (AER) in Cl- and HCO- 3 forms. Total available P (TAP) values in soils were obtained by P depletion experiment by growing plants successively in soils. TAP was significantly related to HCO3 --AER but also with Cl-_ AER (R2 = …