Relevant bibliographies by topics / Synthetic anion exchange resins

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Academic literature on the topic 'Synthetic anion exchange resins'

Author: Grafiati
Published: 19 February 2023

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Journal articles on the topic "Synthetic anion exchange resins"

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Sica, Mihaela, Camelia Draghici, Anca Duta, and Carmen Teodosiu. "Kinetic Study of Nitrite Removal from Municipal Wastewater Using Ion Exchange Resins." Advanced Materials Research 287-290 (July 2011): 1513–16. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.1513.

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Nitrite removal from municipal wastewater is mandatory considering the treated wastewater reuse. Removal on an anion exchanger leads to simple wastewater treatment installations, easy to handle, to exploit and to maintain. This study reports on the performance of anion exchange resin on removing nitrite from synthetic solutions. Equilibrium data could be well fitted using the Langmuir model, confirming ion exchange without any parallel mechanisms. Kinetic study of the process is evaluated using the shrinking core model and the dominant rate mechanism is estimate.
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Fukushima, Akiyoshi, Hioaki Hase, and Koshi Saito. "Adsorption of plant phenols by polystyrene resins." Acta Societatis Botanicorum Poloniae 56, no. 3 (2014): 485–97. http://dx.doi.org/10.5586/asbp.1987.045.

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Adsorption of nine plant phenols by nine polystyrene ion-exchange resins was investigated in an experimental model system. The phenols were adsorbed by Amberlite CG-120 more efficiently than any other acidically charged resins tested in this study. They were also taken up by anion exchangers. Among them Dowex 1-X8 was found to show the strongest effect on the adsorption of the phenolic constituents applied. A comparison of the efficiency of plant phenol adsorption between two different types of the synthetic polymers revealed that the basically charged polystyrenes had more prefarable affinities for phenols than cation exchangers. For example, the ratio of the efficiency between Amberlite CG-120 and Dowex 1-X8 was roughly calculated to be 3:7 under the present experimental conditions. The adsorption rate of the test phenols was raised mostly by increasing the amount of the resins added, if they were mixed with effective polymers in the incubation model system.
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Ezzeldin, Hesham A., Allen Apblett, and Gary L. Foutch. "Synthesis and Properties of Anion Exchangers Derived from Chloromethyl Styrene Codivinylbenzene and Their Use in Water Treatment." International Journal of Polymer Science 2010 (2010): 1–9. http://dx.doi.org/10.1155/2010/684051.

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Amination of vinylbenzyl chloride-divinylbenzene (VBC-DVB) copolymers is an effective method for preparation of ion-exchange resins. Conventionally, the starting polymer is produced by chloromethylation of a styrene-divinylbenzene copolymer that utilizes chloromethyl methyl ether, a known carcinogen. An alterative approach is to copolymerize vinylbenzyl chloride with divinylbenzene to generate the necessary VBC-DVB. This method provides precise control over the density of the ion-exchange groups. The regiochemistry of the vinylbenzyl chloride methods was realized using solvent-ion exchange groups. In this investigation, an improved solvent system was found for the preparation of anion exchange resins by the vinylbenzyl chloride route. The effectiveness of amination of the intermediate VBC-DVB polymers with a variety of trimethylamine reagents was investigated, and ethanolic trimethylamine produced the highest degree of amination. These resulting ion-exchange polymers were characterized by a variety of techniques such as analytical titrations, nitrogen analysis, Fourier transform infrared spectroscopy and thermal gravimetric analysis. Testing of these copolymers for breakthrough was performed. The results indicate that these anion exchangers have a meaningful increase in thermal stability over commercial anionic exchange beads.
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Yegorov, V. V., O. Yu Makovskaya, S. V. Mamyachenkov, and P. A. Kozlov. "SORPTION OF FLUORIDE IONS BY IRON OXYHYDRATE FIXED ON THE CARRIERS. Part 1. Organic carriers." Izvestiya Vuzov Tsvetnaya Metallurgiya (Proceedings of Higher Schools Nonferrous Metallurgy, no. 4 (August 16, 2018): 15–23. http://dx.doi.org/10.17073/0021-3438-2018-4-15-23.

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The article considers possibility of using inorganic sorbent – iron oxyhydrate (IOH) – to remove F– ions from process solutions of zinc production. The method of IOH synthesis is chosen. The results of scanning electron microscopy and X-ray phase analysis are presented. The principal possibility of using ion-exchange resins as IOH-modified carriers is considered. The paper studies active substance formation on anion and cation exchange resins. It is shown that the most durable composite sorbents are obtained using strongly acidic cation exchange resins with SO3– groups. A method for introducing IOH into the structure of carrier materials and obtaining composite sorbents is described. The KU-2×8 strongly acidic cation exchanger is recommended as a composite base. Cation exchangers saturated with iron were held in a sodium chloride solution with a concentration of 2,5 g/dm3 for 24 hours at 85 °C to ensure formation of β-modification IOH crystals distributed over the ion exchanger grain volume. Anion exchangers were held in an iron(III) sulfate solution with added sodium chloride for 24 hours at 85 °C. At the same time, iron oxyhydrate films formed on the surface of sorbent grains were observed. Fluorine sorption was carried out in a static mode from a standardized test solution with a concentration of F– = 100 mg/dm3 at 60 °C. Sorption on the AB-17×8 anionite was carried out at 20 °C. Absorbed fluorine was desorbed by the NaOH (0,1 M) solution at 60 °C for 2 hours. The synthesized KU-2×8-IOH composite sorbent has a fluorine capacity of 0,7–1,1 mg/g, and can be regenerated with resulting easily utilizable fluorine-containing eluate.
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Cyganowski, Piotr, Izabela Polowczyk, Daniela V. Morales, Bruno F. Urbano, Bernabé L. Rivas, Marek Bryjak, and Nalan Kabay. "Synthetic strong base anion exchange resins: synthesis and sorption of Mo(VI) and V(V)." Polymer Bulletin 75, no. 2 (May 18, 2017): 729–46. http://dx.doi.org/10.1007/s00289-017-2065-4.

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Vachon, D. T. "Removal of Iron Cyanide from Gold Mill Effluents by Ion Exchange." Water Science and Technology 17, no. 2-3 (February 1, 1985): 313–24. http://dx.doi.org/10.2166/wst.1985.0140.

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Using a strongly basic anion exchanger (Rohm & Haas Amberlite IRA-958) laboratory ion exchange tests were conducted on the removal of iron cyanide from synthetic and actual gold mill effluents. Variables examined included the effects of pH, concentration and hydraulic loading of the feed on the resin exchange capacity and resin column utilization. The results showed ion exchange to be an effective method of removing iron cyanide to concentrations of less than 3 mg/L. Tests with synthetic gold mill effluents gave resin exchange capacities ranging from 13 to 34 mg CNFe/mL resin depending on the concentration of iron, copper and zinc cyanides in these solutions. When raw barren bleed was tested, an exchange capacity for the ferro/ferricyanides was determined to be ~6 to 8 mg CNFe/mL resin. For chlorinated barren bleed, a resin exchange capacity of 14 mg CNFe/mL resin was observed. A capacity of 19 mg CNFe/mL resin was achieved for tailings pond decant. Regeneration with 15% NaCl provided mixed results with recoveries ranging from 40 to 100% of the iron cyanide exchanged by the resin. Upon multiple exchange-regeneration cycles, the resin lost 25% of the exchange capacity for total cyanide during the first cycle. Subsequently, the loss in exchange capacity was approximately 1% per cycle. Pilot scale tests were considered essential prior to full scale system design.
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Ahn, Hyeong Hun, and Man Seung Lee. "Recoveries of Ru(III) and Co(II) by Solvent Extraction and Ion Exchange from Tungsten Carbide-Cobalt Scrap through a HCl Leaching Solution." Metals 9, no. 8 (August 6, 2019): 858. http://dx.doi.org/10.3390/met9080858.

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The addition of ruthenium to tungsten carbide-cobalt hard metals improves their mechanical properties. Since ruthenium is a platinum group metal, the recovery of ruthenium together with cobalt from the scrap of hard metals is of great importance. In order to develop a recovery process of ruthenium and cobalt, separation experiments were performed from the synthetic HCl leaching solution of the scrap of hard metals. In this work, solvent extraction and ion exchange were employed to investigate the separation behavior of the two metal ions as a function of HCl concentration. Ru(III) was selectively extracted over Co(II) by Aliquat 336 (trioctyl methylammonium chloride) and Alamine 300 (tri-n-octyl amine) when HCl concentration was lower than 5 M. The highest separation factor between Ru(III) and Co(II) was obtained at 3 M HCl. The loaded Ru(III) was stripped from Aliquat 336 by dilute HCl solution. Only Ru(III) was loaded into the anion exchange resins employed in this work in the HCl concentration range from 1 to 9 M. The highest loading percentage of Ru(III) was obtained from 3 M HCl solution. The loading of Ru(III) into anion exchange resins followed Freundlich isotherm and the loading capacity of the resins were determined. The loaded Ru(III) was eluted by the mixture of HCl and thiourea. Compared to solvent extraction, ion exchange was found to be more efficient to separate Ru(III) and Co(II) from the HCl solution in terms of separation factor and the ease of operation.
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Widiasa, I. N., and I. Gede Wenten. "COMBINATION OF REVERSE OSMOSIS AND ELECTRODEIONIZATION FOR SIMULTANEOUS SUGAR RECOVERY AND SALTS REMOVAL FROM SUGARY WASTEWATER." Reaktor 11, no. 2 (July 14, 2011): 91. http://dx.doi.org/10.14710/reaktor.11.2.91-97.

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An integrated membrane system combining reverse osmosis (RO) and electrodeionization (EDI) is used for simultaneous sugar concentration and salts removal from a synthetic dilute sugar solution as a model of sugar-containing wastewater. The RO system uses a thin film composite RO membrane (Saehan CSM, RE1812-60). Meanwhile, the EDI stack has two diluted compartments, one concentrated compartment, one anode compartment, and one cathode compartment. Commercially available cation exchange membrane (MC-3470) and anion exchange membrane (MA-3475) are used as ionic selective barriers of the EDI stack. Both diluate and concentrate compartments are filled with mixed ion exchange resins (purolite strong acid cation exchange, C-100E and strong base type I anion resins, A-400). Two different operation modes, i.e. RO-EDI and EDI-RO, were assessed. The experimental results show that the observed sugar rejection of RO membrane is more than 99.9% and there is no sugar loss in the EDI stack. This indicates that the hybrid process allows almost total sugar recovery. In addition, significant reduction of salts content from the concentrated sugar solution is obtained. From permeate flux and permeate purity points of view, however, the EDI-RO configuration seems superior to the RO-EDI configuration. It should be emphasized that scale formation on the membrane surface of the concentrate compartment side has to be controlled.
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Shvydko, A. V., S. A. Prikhod’ko, and M. N. Timofeeva. "The Synthesis of Glycerol Carbonate from Glycerol and Dimethyl Carbonate in the Presence of Strongly Basic Anion-Exchange Styrene-Divinylbenzene Anionites Dowex." Kataliz v promyshlennosti 21, no. 6 (November 23, 2021): 398–405. http://dx.doi.org/10.18412/1816-0387-2021-6-398-405.

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The synthesis of glycerol carbonate from glycerol and dimethyl carbonate in the presence of strongly basic styrene-divinylbenzene anionites Dowex 1×2, Dowex 1×4 and Dowex 1×8 in the –OH form with different cross-linking degree of polystyrene matrix (the divinylbenzene content of 2, 4 and 8 wt.%) at 90–105 °C and a dimethyl carbonate/glycerol molar ratio equal to 2 was studied. The yield of glycerol carbonate was shown to decrease with an increase in the cross-linking degree of the anion-exchange resin. The maximum conversion of glycerol (95 %) and selectivity to glycerol carbonate (45.5 %) were observed in the presence of Dowex 1×2 at 105 °C after 5 h of the reaction. Advantages of the studied systems were demonstrated in comparison with the anion-exchange and cationexchange resins proposed in the literature.
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Huan Wang, Huan Wang, and Boru Chen and Siming Zhu Boru Chen and Siming Zhu. "Novel Synthesis Method, Characterization and Bioactivities of a Copper(Ⅱ)-Hesperetin Complex Using Ion Exchange Column." Journal of the chemical society of pakistan 42, no. 2 (2020): 204. http://dx.doi.org/10.52568/000632.

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A copper(Ⅱ)-hesperetin complex formulated as [Cu(L)2(H2O)2]and#183;H2O (andquot;Landquot; represented the ligand hesperetin) was synthesized using a novel ion-exchanging resin column method, based on the integration of the separation of hesperetin on hesperetin-loaded resins and the reaction of hesperetin with Cu2+ using CuCl2 as an eluent and reacting reagent. The feasibility of this new method was testified firstly. Results indicated the D296 macroporous strong basic anion exchange resin could effectively adsorb hesperetin and the saturated adsorption capacity was 143.5 mg per mL resin. The favorable concentration of CuCl2 was 0.4 mol/L for the elution and the coordination process of hesperetin. The characterization of the copper(Ⅱ) complex was done by theoretical quantum chemical calculation, elemental and thermal analyses, UV-Vis absorption spectra, FTIR spectra and XRD analysis, results testified that the 4-carbonyl group and 5-hydroxyl group of hesperetin were involved in the coordination reaction. The comparison between hesperetin and its copper(Ⅱ) complex about their bioactivities like the inhibitory effect of α-amylase, antioxidant activities and solubility were evaluated. Results showed the bioactivities of the copper(Ⅱ) complex was better than that of hesperetin.
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Dissertations / Theses on the topic "Synthetic anion exchange resins"

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Pathak, Sudhir Kumar. "Treatment of Landfill leachates using anion exchange resins." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51812.

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Landfill leachates are often discharged to wastewater treatment plants (WWTPs) but their highly varied composition makes their treatment in WWTPs difficult. Landfill leachates contain bio-refractory organic matter which easily passes the biological treatment processes at WWTPs and increases the organic matter in the effluent. Leachates also interfere with the UV disinfection process at treatment plants. Another concern is the presence of large amounts of bio-refractory organic nitrogen in the leachates which makes it difficult for WWTPs to meet the tightening total nitrogen requirements. Studies 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 for all studied leachates. The resins were found to remove more bio-refractory UV absorbing substances as compared to total organic carbon (TOC), suggesting that anion exchange resins could be employed for removal of UV absorbing substances. Multiple regenerations of the resin showed slight loss in the capacity to remove UV and organic carbon. Fractionation of leachate samples showed effective removal of humic acid (HA) fraction which is responsible for most of UV quenching. The resin was also found to effectively remove the bio-refractory hydrophilic (Hpi) fraction which tends to persist even after HA fraction has bio-degraded. Membrane filtration (1000 Da and 3000 Da Molecular weight cut off) in conjunction with ion exchange resins achieved better removal of organic matter and UV254 absorbing substances. In addition, this also significantly improved the performance of resins. Significant removal of organic nitrogen was also observed using anion exchange though it was less than both UV and TOC. Around 80% removal of organic nitrogen associated with bio-refractory Hpi fraction was achieved using anion exchange suggesting ion exchange as a viable alternative for removing organic nitrogen.
Master of Science
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Dixit, Fuhar. "Anion exchange resins for the removal of microcystins from surface water." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/63181.

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Harmful algal blooms have markedly increased in frequency over the past two decades, due to rising global temperatures and chemical runoff produced by modern farming practices. Cyanobacteria, also known as the blue green algae, are an essential part of the aquatic food chain. Cyanobacterial toxins, which are released from the algal biomass, can contaminate drinking, recreational and agricultural water reserves. Such environmental and health hazards pose a serious threat to communities and many aquatic ecosystems. In particular, small, shallow lakes that are sources of drinking water for rural communities have been particularly affected by elevated levels of algal toxins. Conventional water treatment systems are inefficient in removing these toxins, and may produce hazardous by-products. Additionally, the effectiveness of chemical oxidants, like chlorine and ozone, is hindered by the presence of natural organic matter (NOM) and inorganic ions in the contaminated water. Such challenges reveal the need for alternative treatment technologies capable of removing algal toxins. Anionic ion exchange (IX) resins offer a promising and cost-effective treatment alternative for natural waters affected by high algal content and high dissolved organic carbon (DOC) levels. This research investigates the efficiency of strongly basic ion exchange resins for the removal of microcystin-LR (MCLR), the most common toxin released from the algal biomass, inorganic ions, and NOM from natural water sources. We focused specifically on optimizing resin dosage, resin regeneration, and scaling up such procedures for particular source waters. Our results showed that the resin exhibited an excellent adsorption capacity of 3850 µg/L, removing more than 80% of the MCLR within 10 minutes at examined resin dosages (10 to 1000 mg/L; 1mL of resin = 221 mg). Additionally, we examined the influence of operating parameters such as pH and adsorption capacity of the resin, as well as the impact of NOM fractions on the uptake of MCLR. The charge density and molecular weight of the source water NOM were found to play a major competitive role in the uptake of Microcystin-LR. The results of this study bring the promising potential of IX resins for the removal of Microcystins and NOM from surface waters to light.
Applied Science, Faculty of
Chemical and Biological Engineering, Department of
Graduate
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Lee, Kenneth Chung-Keong School of Chemical Engineering &amp Industrial Chemistry UNSW. "Cyanide regeneration from Thiocyanate with the use of Anion exchange resins." Awarded by:University of New South Wales. School of Chemical Engineering and Industrial Chemistry, 2005. http://handle.unsw.edu.au/1959.4/23018.

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It is known in many gold operations that less than 2% of the cyanide consumed accounts for the gold and silver dissolution. The majority of the cyanide is consumed by minerals contained in the gold ore to produce many different cyanide soluble complexes or used in converting cyanide to other related species such as thiocyanate and cyanate. The high costs associated with cyanide and thiocyanate detoxification and excessive cyanide utilisation encountered when treating ores with high cyanide consumption constitutes a significant proportion of the overall processing costs. This study examines the possibility of recovering free cyanide from thiocyanate using a process based on the Acidification-Volatilisation-Regeneration (AVR) circuit in conjunction with a pre-concentration stage using commercially available ionexchange resin. From thermodynamic modelling based on the STABCAL program it was found that it was thermodynamically possible to recover cyanide from thiocyanate if the oxidation of cyanide to cyanate can be stopped. Addition of copper to the system found that the majority of the thiocyanate exists as copper(I) thiocyanate (CuSCN) solid. Using ion-exchange resins can be an effective way to concentrate thiocyanate from tailing solutions or slurries. Four different models were successfully used to model the equilibria between thiocyanate and chloride on commercial ion-exchange resins. By normalising the equilibria data when applying the Mass action law the equilibria becomes independent of ionic strength within the range of concentration considered. An advantage of this is that only one unique equilibrium constant is used to describe the ion-exchange process. The electrochemical and kinetic studies showed that the reaction between thiocyanate and hydrogen peroxide is catalysed by hydrogen ions. Secondly under acidic conditions the rate of cyanide recovery by the AVR circuit was faster than at higher pH conditions. The overall reaction of thiocyanate with respect to the concentration of thiocyanate and hydrogen peroxide is an overall third order reaction. The derived third order rate expression is first order with respect to thiocyanate concentration and second order with respect to hydrogen peroxide concentration. Previous studies showed that the production of cyanide inhibits the reactions between thiocyanate and hydrogen peroxide, but by removing cyanide from the reaction by air stripping, this was not observed. Addition of copper to the system did not show a catalytic effect on the reaction but it was found that copper (II) ions suppresses competing reactions that occurred without affecting the reaction between thiocyanate and hydrogen peroxide.
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O'Malley, Glen Peter. "Recovery of gold from thiosulfate solutions and pulps with anion-exchange resins." Thesis, O'Malley, Glen Peter (2002) Recovery of gold from thiosulfate solutions and pulps with anion-exchange resins. PhD thesis, Murdoch University, 2002. https://researchrepository.murdoch.edu.au/id/eprint/3355/.

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With growing environmental and occupational safety concerns over the use of cyanide in gold processing, more acceptable alternatives are receiving increased interest. The most promising of the possible alternatives is thiosulfate. However, as activated carbon is not an effective substrate for the adsorption of the gold thiosulfate complex, the thiosulfate process lacks a proven in-pulp method for recovering dissolved gold. Anion exchange resins offer a possible route for in-pulp recovery. This thesis describes work aimed at evaluating the effectiveness of commercially available anion exchange resins for the recovery of gold from thiosulfate leach liquors and pulps. It was found that Strong-base resins are superior at accommodating the gold thiosulfate complex compared to Weak-base resins, which means Strong-base resins have a greater capacity to compete with other anions in leach solutions. Strong-base resins were therefore the preferred choice of resin for recovery of gold from thiosulfate leach solutions and pulps. Work with a selected commercial Strong-base resin showed that competing polythionates (particularly tri- and tetrathionate) lower the maximum possible loading of gold but that gold is selectively recovered over other base-metal anions in typical leach solutions. From kinetic experiments, it was found that competing polythionates did not affect the initial rate of loading of gold but displaced the loaded gold at long times. Thus it would be important to minimise the contact time of the resin with the pulp. Equilibrium loading isotherms of gold in the presence of competing anions could be analysed by treating the ion exchange reaction as a simple chemical reaction. However, a stoichiometry and equilibrium quotient which does not follow that normally used for anion exchange, was required to describe the experimental data. A single value for the equilibrium constant also cannot be used to describe the data over the range of concentrations for a given competing anion. The order of selectivity of the anions for the anion exchange resin could be explained by the difference in structure and the charge of each anion. The rate of loading of gold is controlled by mass transport in the aqueous phase in the presence of weakly competing anions such as sulfate and thiosulfate. An attempt was made to describe the more complex loading curves obtained in the presence of stronger competing anions such as sulfite, trithionate and tetrathionate in which it was found that the loading of gold increased to a maximum before declining to a lower equilibrium value. The difference in the rate of loading between the macroporous and gel anion exchange resins was explained by the difference in the location of their functional groups. Operation of a small-scale resin-in-pulp plant showed that gold could be recovered from a leach pulp to yield loadings of gold of up to 6000 mg L-1 and loadings of copper below 100 mg L-1. Under ideal conditions, the gold concentration in the barren pulp could contain less than 0.01 mg L-1. Throughout the trial it was shown that loaded copper would be displaced by gold which would result in the loading of copper falling from 2000 mg L-1 in the last stage to lower than 100 mg L-1 on the resin in the first stage. It was observed that some of the dissolved gold precipitated or adsorbed on the solids during leaching. Some of this adsorbed gold was found to be recovered by the anion exchange resins that would have reported to the tails if a solid/liquid separation method was employed. Gold was efficiently eluted with a nitrate solution and the two-step elution process using aerated ammonia followed by nitrate effectively stripped all the copper and gold from the resin. This process was found not to materially affect the equilibrium gold concentration on the resin after eight cycles, thus allowing the resin to be recycled without the need for regeneration. Electrochemical studies showed that the gold thiosulfate complex was reduced on stainless steel from a nitrate solution. Conventional electrowinning could therefore be used to recover the gold from the eluant.
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Singare, Pravin U. "Ion-Isotopic exchange reaction kinetics in characterization of anion exchange resins Dowex 550A LC and Indion-820." Diffusion fundamentals 19 (2013) 4, S. 1-21, 2013. https://ul.qucosa.de/id/qucosa%3A13706.

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The present paper involves application of nondestructive radioactive tracer technique in characterization of Dowex 550A LC and Indion-820 anion exchange resins. The characterization study was based on kinetic of exchange reactions between inactive iodide/bromide ions on the resins with radioactive iodide/bromide ions in the solution. During iodide exchange reaction performed at a constant temperature of 40.00C, using 1.000 g of ion exchange resins and labeled iodide ion solution of concentration 0.003 mol/L, for Dowex 550A LC resin the specific reaction rate and initial rate of ion exchange was 0.271 min-1 and 0.141 mmol/min respectively, while the amount of iodide ions exchanged was 0.522 mmol, and log Kd was calculated to be 12.1. The above values calculated for Dowex 550A LC resin was higher than the respective values of 0.108, 0.330, 0.036 and 6.0 as obtained for Indion-820 resins. Similar results were obtained for the two resins during bromide exchange reactions, thereby indicating superior performance of Dowex 550A LC resin over Indion-820 resins.
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Singare, Pravin U. "Ion-Isotopic exchange reaction kinetics in characterization of anion exchange resins Dowex 550A LC and Indion-820." Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-184151.

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The present paper involves application of nondestructive radioactive tracer technique in characterization of Dowex 550A LC and Indion-820 anion exchange resins. The characterization study was based on kinetic of exchange reactions between inactive iodide/bromide ions on the resins with radioactive iodide/bromide ions in the solution. During iodide exchange reaction performed at a constant temperature of 40.00C, using 1.000 g of ion exchange resins and labeled iodide ion solution of concentration 0.003 mol/L, for Dowex 550A LC resin the specific reaction rate and initial rate of ion exchange was 0.271 min-1 and 0.141 mmol/min respectively, while the amount of iodide ions exchanged was 0.522 mmol, and log Kd was calculated to be 12.1. The above values calculated for Dowex 550A LC resin was higher than the respective values of 0.108, 0.330, 0.036 and 6.0 as obtained for Indion-820 resins. Similar results were obtained for the two resins during bromide exchange reactions, thereby indicating superior performance of Dowex 550A LC resin over Indion-820 resins.
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Shields, Anthony J. "UNDERSTANDING AND MODELING THE SORPTION ON ANION EXCHANGE RESINS USING POLY-PARAMETER LINEAR FREE-ENERGY RELATIONSHIPS AND PHASE CONVERSION." Master's thesis, Temple University Libraries, 2013. http://cdm16002.contentdm.oclc.org/cdm/ref/collection/p245801coll10/id/217867.

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Civil Engineering
M.S.Env.E.
Priority organic and emerging contaminants are a growing concern for drinking water treatment due to their increasing presence in the environment. This study 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 poly-parameter linear free energy relationships (pp-LFERs) and the feasibility of phase conversion (e.g., an ideal gas phase as the reference state) for ionic species was examined. To develop the model, a training set of isotherms was obtained using aliphatic and aromatic carboxylates, phenols, anilines, nitrobenzene, and ibuprofen. These compounds were chosen as model organic contaminants in the environment. The training set and 1-3 test compounds (3-methyl-2-nitrobenzoate, phenol, and 4-nitroaniline) were accurately predicted using the created model for each resin. An understanding of the effects of resin structure on sorption interactions was also developed that focused on ionic functional groups, resin matrix, and hydrophilicity (i.e. water content). It was shown that greater sorption efficiency was achieved when electrostatic (ion exchange) and nonelectrostatic (adsorption) interactions were present together to create a synergistic addition. However, sorption on ion exchangers was poor if the pH of the system approached levels lower than the sorbate pKa. Additionally, weak base exchanges lose exchange capacity as pH levels approach resin pKa (IRA-96 pKa = 6.0). Additional contributions to the sorption mechanisms were observed by studying various electron donating/withdrawing functional groups on the contaminants. It was concluded that π-π and H-bonding interactions contributed a greater amount to the nonelectrostatic mechanisms than cavity formation forces and nonspecific forces. A comparison between the three resins showed that IRA-96 (weak base polystyrenic) had a greater removal capacity than IRA-910 (strong base polystyrenic), followed far behind by A860 (strong base polyacrylate). This is due to differences between the resins, such as the hydrophilicity, the density of the ion exchange group, and the presence of aromatic rings within the matrix structure. Although the modeling method accurately predicted the phase change from aqueous to sorbent phases, it was shown that the SPARC calculated aqueous-gas ion transfer energies were poor estimations of the transfer energy to the ideal gas phase and further study is necessary to accurately determine this value. This modeling methodology is believed to be applicable to emerging contaminants such as pharmaceuticals in water systems and helps further new water treatment technologies while developing a mechanistic understanding of electrostatic and nonelectrostatic interactions in general. This can be applied to additional separation processes such as chemical purification and chromatographic separation.
Temple University--Theses
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Zainal-Abidin-Murad, Sumaiya. "Production of biodiesel from used cooking oil (UCO) using ion exchange resins as catalysts." Thesis, Loughborough University, 2012. https://dspace.lboro.ac.uk/2134/10276.

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This study focuses on the development of novel two-stage esterification-transesterification synthesis of biodiesel from used cooking oil (UCO) using novel heterogeneous catalysts. The esterification of the UCO was investigated using three types of ion exchange resins catalysts including Purolite D5081, Purolite D5082 and Amberlyst 15. Of all the catalysts investigated, Purolite D5081 resin showed the best catalytic performance and was selected for further optimisation studies. From the optimisation study, it was found that the external and internal mass transfer resistance has negligible effect on the esterification reaction. At the optimum reaction conditions, Purolite D5081 achieved 92% conversion of FFA. During reusability study, the conversion of FFA dropped by 10% after each cycle and it was found that progressive pore blockage and sulphur leaching were dominant factors that decreased the catalytic performance of the Purolite D5081 catalyst. A kinetic modelling for FFA esterification was carried out using Purolite D5081 as a catalyst. Three types of kinetic models were investigated i.e. pseudo homogeneous (PH), Eley-Rideal (ER) and Langmuir-Hinshelwood-Hougen-Watson (LHHW). Experimental data obtained from the batch kinetic studies was successfully represented by the PH model and a good agreement between experimental and calculated values was obtained. The activation energy for esterification and hydrolysis reaction was found to be 53 and 107 kJ/moL. The transesterification of pre-treated cooking oil (P-UCO) was investigated using various types of heterogeneous catalysts including Purolite CT-122, Purolite CT-169, Purolite CT-175, Purolite CT-275, Purolite D5081, Diaion PA306s and Cs-supported heteropolyacids catalysts. Of all the catalysts investigated, Diaion PA306s catalyst showed the highest conversion of triglycerides and was selected for further optimisation studies. At the optimum reaction conditions, Diaion PA306s achieved ca. 75% of triglycerides conversion. During the reusability study, Diaion PA306s catalyst gave a similar conversion of triglycerides after being reused once. Therefore, it was concluded that the resin can be used several times without losing catalytic activity. Several purification methods have been investigated and dry washing method was chosen as the best alternative for biodiesel purification.
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9

Basaran, Tolga Yener. "Ion Exchangers In The Recovery Of Tartaric Acid From Aqueous Solutions." Master's thesis, METU, 2006. http://etd.lib.metu.edu.tr/upload/12607367/index.pdf.

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Tartaric acid is a dicarboxylic acid naturally present in grapes, and has many application areas with its salts. It can be produced synthetically, manufactured as a by-product in wine industry, or can be recovered by electrodialysis and solvent extraction methods. Since, ion exchange is one of the oldest processing techniques for the recovery and purification of valuable materials, it can be applied to obtain this valuable organic acid. In this study it is aimed to investigate the effects of resin basicity, initial concentration, and initial pH of the solution on ion exchange equilibrium. The model tartaric acid solutions were prepared for the equilibrium analysis with two different anion exchange resins in a batch type system. A shaker bath at 28 oC with 300-rpm agitation rate was used. The weakly basic resin Lewatit MP62, and strongly basic resin Lewatit M511, which are in polystyrene structure, was obtained from the producer Bayer AG. In the analysis, Shimadzu PDA Detector at 210 nm with Waters Atlantis dC18 column was used. 20 mM NaH2PO4 at pH = 2.7 was introduced to the HPLC as the mobile phase at 0.5 ml/min flow rate. In the investigation of the resin basicity, MP62 presented better performance than M511. The equilibrium experiments were performed at three different initial acid concentrations (0.01, 0.02, and 0.10 M) for both resin, and in the pH ranges pH <
pKa1, pKa1 <
pH <
pKa2, and pKa2 <
pH for weakly basic resin, and in the pH ranges pH <
pKa1, pKa1 <
pH <
pKa2 for strongly basic resin at each concentration. Results show that the pH of the solution is a more important parameter than the initial concentration that affects the ion exchange equilibrium. Also, Langmuir and Freundlich isotherms were plotted, and it was shown that they were in good agreement with the experimental data especially for the systems that are at low total ion concentrations.
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Less, John Ryan. "Comparison of Natural Organic Matter (NOM) Removal Processes on Disinfection Byproduct (DBP) Formation During Drinking Water Treatment." University of Akron / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=akron1293217404.

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Books on the topic "Synthetic anion exchange resins"

1

Morgan, P. The immobilisation of anion exchange resins in polymer modified cements. Salford: University of Salford, 1991.

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United States. Bureau of Mines. Selective Elution of Mercury, Silver, and Gold From Strong-Base Anion-Exchange Resins. S.l: s.n, 1987.

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Staker, W. L. Selective elution of mercury, silver, and gold from strong-base anion-exchange resins. Pittsburgh, Pa: U.S. Dept. of the Interior, Bureau of Mines, 1987.

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Faubert, Natalie. Properties of Amberlite IRN78, Dowex 1-X8, and Purolite A400 strong anion exchange resins. Sudbury, Ont: Laurentian University, 2001.

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Wrotnowski, Cort. Ion exchange technology: Problems, progress, opportunities. Norwalk, CT: Business Communications Co., 1995.

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Evaluation of an anion exchange resin for sampling ambient level phenolic compounds: Project summary. Research Triangle Park, NC: U.S. Environmental Protection Agency, Atmospheric Research and Exposure Assessment Laboratory, 1990.

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S, Hovanitz Edward, Chi Sulan, and NASA Glenn Research Center, eds. Lead removal from synthetic leachate matrices by a novel ion-exchange material. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 2002.

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Ion Exchange Resins and Synthetic Adsorbents in Food Processing: Second Edition. Books on Demand GmbH, 2011.

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C, Budd George, and AWWA Research Foundation, eds. Evaluation of MIEX: Process impacts on different source waters. Denver, CO: Awwa Research Foundation, 2005.

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Book chapters on the topic "Synthetic anion exchange resins"

1

Saito, Yuki. "Anion Exchange Resins as Catalysts for Direct Aldol-Type Reactions of Ketones, Esters, and Nitriles Under Continuous-Flow Conditions." In Multistep Continuous Flow Synthesis of Fine Chemicals with Heterogeneous Catalysts, 91–113. Singapore: Springer Nature Singapore, 2022. http://dx.doi.org/10.1007/978-981-19-7258-4_4.

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Biswas, Mukul, and S. Packirisamy. "Synthetic ion-exchange resins." In Key Polymers Properties and Performance, 71–118. Berlin, Heidelberg: Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/3-540-15481-7_8.

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Tomotani, Ester Junko, and Michele Vitolo. "Screening of Dowex® Anion-Exchange Resins for Invertase Immobilization." In Proceedings of the Twenty-Fifth Symposium on Biotechnology for Fuels and Chemicals Held May 4–7, 2003, in Breckenridge, CO, 145–59. Totowa, NJ: Humana Press, 2004. http://dx.doi.org/10.1007/978-1-59259-837-3_13.

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Fu, Paul L. K., and James M. Symons. "Mechanistic Interactions of Aquatic Organic Substances with Anion-Exchange Resins." In Advances in Chemistry, 797–811. Washington, DC: American Chemical Society, 1988. http://dx.doi.org/10.1021/ba-1988-0219.ch044.

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Tebibel, P., and E. Zaganiaris. "Nitrate Removal from Water: The Effect of Structure on the Performance of Anion Exchange Resins." In Ion Exchange Advances, 41–48. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2864-3_6.

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Ergozhin, E. E., E. Zh Menligaziev, T. Chukenova, A. K. Chalov, and I. K. Abdrakhmanova. "SYNTHESIS AND PROPERTIES OF ANION EXCHANGE MEMBRANES BASED ON EPOXY DERIVATIVES OF DIHYDROXYBENZENES AND AMINOPHENOLS." In Synthetic Polymeric Membranes, edited by Blahoslav Sedláček and Jaroslav Kahovec, 49–54. Berlin, Boston: De Gruyter, 1987. http://dx.doi.org/10.1515/9783110867374-006.

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McGarvey, Francis X., and Regina Gonzalez. "Ion Exchange Studies on Strongly Basic Anion Exchange Resins Prepared with Tertiary Amines of Varying Molecular Weight." In Ion Exchange Advances, 97–103. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2864-3_13.

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Rogers, Mike E., Boyce Tucker, and Guy Mommaerts. "Operating Experience with Different Weak Base Anion Resins in the Following Configuration: WAC-WBA-SAC-DEGAS-SBA." In Ion Exchange Advances, 57–64. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2864-3_8.

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Gu, Baohua, Gilbert M. Brown, Spiro D. Alexandratos, Robert Ober, James A. Dale, and Steven Plant. "Efficient Treatment of Perchlorate (ClO4 −)-Contaminated Groundwater with Bifunctional Anion Exchange Resins." In Perchlorate in the Environment, 165–76. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/978-1-4615-4303-9_16.

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Marsh, S. Fredric. "The Effects of External Gamma Radiation and of IN SITU Alpha Particles on Five Strong-Base Anion Exchange Resins." In Ion Exchange Advances, 358–65. Dordrecht: Springer Netherlands, 1992. http://dx.doi.org/10.1007/978-94-011-2864-3_47.

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Conference papers on the topic "Synthetic anion exchange resins"

1

YOSHIDA, HIROYUKI, STEFFEN OEHLENSCHLAEGER, YUJI MINAMI, and MASAAKI TERASHIMA. "ADSORPTION OF CO2 ON BASIC ANION EXCHANGE RESINS." In Proceedings of the Second Pacific Basin Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793331_0137.

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Kvasyuk, E. I., Y. N. Gretskaya, V. I. Yaroshevich, and M. А. Khancheuski. "SYNTHESIS OF SECO-DERIVATIVES OF ADENOSINE AND URIDINE." In SAKHAROV READINGS 2022: ENVIRONMENTAL PROBLEMS OF THE XXI CENTURY. International Sakharov Environmental Institute of Belarusian State University, 2022. http://dx.doi.org/10.46646/sakh-2022-1-212-216.

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The effectiveness of the different methods for transformation of the natural ribonucleosides adenosine 16 and uridine 17 into its nucleoside dialdehydes 18 and 19 was studied. NaIO4 and anion exchange resin Dowex 1x2 (100-200 mesh) in IO4_-form were used as a regents. The nucleoside dialdehydes 18 and 19 were obtained with the yield 70-83%. It was shown that the reaction of periodate oxidizing of ribonucleosides with anion exchange resin in IO4_-form has preference to the method which used NaIO4. Reaction of dialdehydes 18 and 19 with NaBH4 results in formation of nucleosides trioles 20 and 21 with 50 and 45% yields, respectively.
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YOSHIDA, HIROYUKI, STEFFEN OEHLENSCHLAEGER, YUJI MINAMI, and MASAAKI TERASHIMA. "ADSORPTION OF CO2 ON COMPOSITES OF ANION EXCHANGE RESINS AND CHITOSAN." In Proceedings of the Second Pacific Basin Conference. WORLD SCIENTIFIC, 2000. http://dx.doi.org/10.1142/9789812793331_0138.

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Zhou, Yan, and Haifeng Zhang. "Design and Research of Spent Resin Conical Dryer Device." In 2017 25th International Conference on Nuclear Engineering. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/icone25-66008.

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This paper introduced the design and research of spent resin conical dryer which was based on the analysis of the thermal decomposition characteristics of resins. The drying experiment of non-radioactive cation exchange resins and anion exchange resins was also carried out in this study. The result showed that the water content of resins reduced from about 55%(wt) to 8.5%(wt) and the volume reduction ration reached 2.17 with a drying end temperature of 90°C, which preliminarily verified the feasibility of the vacuum drying process and conical dryer device for treating radioactive spent resins.
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Li, Hongyan, and Xiuping Yue. "Notice of Retraction: Thermodynamics Study on Removing Nitrate Nitrogen from Wastewater with Anion Exchange Resins." In 2011 5th International Conference on Bioinformatics and Biomedical Engineering. IEEE, 2011. http://dx.doi.org/10.1109/icbbe.2011.5780156.

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Paviet-Hartmann, Patricia, Amber Wright, Edward Mausolf, Keri Campbell, and Frederic Poineau. "Application of Formohydroxamic Acid in Nuclear Processing: Synthesis and Complexation With Technetium-99." In 18th International Conference on Nuclear Engineering. ASMEDC, 2010. http://dx.doi.org/10.1115/icone18-29028.

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Acetohydroxamic acid (AHA) is an organic ligand planned for use in the Uranium Extraction (UREX) process. It reduces neptunium and plutonium, and the resultant hydrophilic complexes are separated from uranium by extraction with tributyl phosphate (TBP) in a hydrocarbon diluent. AHA undergoes hydrolysis to acetic acid which will impede the recycling of nitric acid. During recent discussions of the UREX process, it has been proposed to replace AHA by formohydroxamic acid (FHA). FHA will undergo hydrolysis to formic acid which is volatile, thus allowing the recycling of nitric acid. The reported reduction potentials of AHA and pertechnetate (TcO4−) indicated that it may be possible for AHA to reduce technetium, altering its fate in the fuel cycle. At UNLV, it has been demonstrated that TcO4− undergoes reductive nitrosylation by AHA under a variety of conditions. The resulting divalent technetium is complexed by AHA to form the pseudo-octahedral trans-aquonitrosyl (diacetohydroxamic)-technetium(II) complex ([TcII(NO)(AHA)2H2O]+). In this paper, we are reporting the synthesis of FHA and its complex formation with technetium along with the characterization of FHA crystals achieved by NMR and IR spectroscopy. Two experiments were conducted to investigate the complexation of FHA with Tc and the results were compared with previous data on AHA. The first experiment involved the elution of Tc from a Reillex HP anion exchange resin, and the second one monitored the complexation of technetium with FHA by UV-visible spectrophotometry.
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Muradov, Nazim Z., and Ali T-Raissi. "Solar Production of Hydrogen Using “Self-Assembled’’ Polyoxometalate Photocatalysts." In ASME 2005 International Solar Energy Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/isec2005-76071.

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Near-term and cost-effective production of solar hydrogen from inexpensive and readily available hydrogen containing compounds (HCCs) can boost the prospects of future hydrogen economy. In this paper, we assess the prospects of solar-assisted conversion of HCCs into hydrogen using polyoxometalate (POM) based photocatalysts, such as isopolytunstates (IPT) and silicotungstic acid (STA). Upon exposure to solar photons, IPT aqueous solutions containing various HCCs (e.g. alcohols, alkanes, organic acids, sugars, etc.) produce hydrogen gas and corresponding oxygenated compounds. The presence of small amounts of colloidal platinum increases the rate of hydrogen evolution by one order of magnitude. A solar photocatalytic flat-bed reactor, approximately 1.2 m × 1.2 m in size, was fabricated and tested for production of hydrogen from water-alcohol solutions containing IPT and STA and small amounts of colloidal Pt. The solar photoreactor tests demonstrated steady-state production of hydrogen gas for several days. IPT immobilized on granules of anion exchange resins with quaternary ammonium active groups show good photocatalytic activity for hydrogen production from water-alcohol solutions exposed to near-UV or solar radiation.
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Ghanem, Fred. "Juice Debittering: Basic Science, Optimization, and Recent Advances." In ASME 2012 Citrus Engineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/cec2012-5701.

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Bitterness such as Naringin in Grapefruits and Limonin in all Citrus fruits have a strong influence on consumers’ choices for their favorite juices. There have been many methods from ultrafiltration to biocatalysis used to lower such bitter compounds and make the juices more desirable by the consumer. One major tool for such debittering operation is the use of synthetic adsorbents which will be discussed in this paper. Ion exchange resins and adsorbents have been used for over a century in various food applications to concentrate flavors, decolorize juices, and enhance the quality of the final product. These types of resins are being synthesized to specific parameters to distinguish them from other tools. Mitsubishi Chemical’s work on optimizing their synthetic adsorbents for high bitterness removal from citrus juice was investigated. Parameters such as the base matrix structure, pore size and distribution, as well as the effect of surface area were studied. As the FDA has strict definitions about the appropriate resin chemistry that can be used in a food application (21 CFR 173.65), progress in new resin chemistry was limited by such regulations. This paper discusses the use of the original Sepabeads SP70 which was introduced into the market about 20 years ago, to the high capacity resin, Sepabeads SP700, which was introduced 10 years ago, and finally, to the Sepabeads SP710, which is the current optimized version of 20 years of research work. Mitsubishi Chemical’s resins were compared to other resins in the industry for the removal of naringin, limonin, and 8-hydroxyfuranocoumarin (furanocoumarins are compounds that affects the proper absorption of certain medications). Proper regeneration and rejuvenation of these resins were outlined. Paper published with permission.
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Selak, M. A., M. Chignard, and J. B. Smith. "CHARACTERIZATION OF A NEUTROPHIL CPYMOTRYPSIN-LIKE ENZYME THAT ACTIVATES PLATELETS." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1643157.

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Communication between neutrophils and platelets was previously investigated by measuring platelet aggregation, serotonin release and changes in cytosolic free calcium subsequent to specific stimulation of neutrophils by fMet-Leu-Phe (FMLP) in a suspension of both cell types. The addition of the chemotactic peptide was shown to elicit secondary platelet activation as a consequence of primary stimulation of neutrophils. Cell-free supernatants from FMLP-stimulated neutrophils were capable of inducing platelet activation thus demonstrating that a factor released bv neutrophils was responsible for the observed platelet responses. After eliminating classical platelet agonists as the acitive agent, it was shown that an enzyme termed neutroohilin induced platelet calcium mobilization, secretion and aggregation. The current studies were conducted to characterize the mediator released bv neutrophils. Neutrophilin bound bo cation exchange resins but failed to bind to anion exchangers. The biological activity associated with neutroohilin was unaffected by leupeptin, only very weakly diminished by N-bosyl-Lvs-chloromethvl ketone and was strongly inhibited by N-tosvl-Phe-chloromethvl ketone, aloha-l-antitrvpsin, soybean trypsin inhibitor and Z-Glv-Leu-Phe-chloromethvl ketone. Neutroohilin was released from stimulated neutrophils only after cytochalasin B treatment, as was beta-glucuronidase, suggesting that both enzymes are located in azurophilic granules. Neutroohilin-induced platelet activation was inhibited bv antiserum to human catheosin G in a dose-deoendent manner but was unaffected by antiserum to human elastase or alpha-fetoprotein. The inhibitor sensitivity, immunological cross-reactivity, ionic properties and probable subcellular localization indicate that neutrophilin is a cationic chymotrvosin-like enzyme related, if not identical to, catheosin G. Neutroohilin-induced platelet activation could explain different pathological events in which platelets and neutroohils are known to be involved.
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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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Reports on the topic "Synthetic anion exchange resins"

1

Schroeder, Norman C., Susan D. Radzinski, Jason R. Ball, Kenneth R. Ashley, Steven L. Cobb, Brent Cutrell, J. Michael Adams, Coy Johnson, and Glenn D. Whitener. Technetium partitioning for the Hanford Tank Waste Remediation System: anion exchange studies for partitioning technetium from synthetic DSSF and DSS simulants and actual Hanford wastes (101-SY and 103-SY) using Rellex-HPQ resin. Office of Scientific and Technical Information (OSTI), December 1995. http://dx.doi.org/10.2172/1400218.

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Bartsch, Richard A., and Mary E. Barr. New Anion-Exchange Resins for Improved Separations of Nuclear Materials. Office of Scientific and Technical Information (OSTI), April 2001. http://dx.doi.org/10.2172/790210.

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Barr, M. E., and R. A. Bartsch. New anion-exchange resins for improved separations of nuclear materials. Office of Scientific and Technical Information (OSTI), June 1998. http://dx.doi.org/10.2172/13730.

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Barr, Mary E., Gordon Jarvinen, Eddie Moody, and Richard A. Bartsch. New Anion Exchange Resins for Improved Separations of Nuclear Materials. Office of Scientific and Technical Information (OSTI), June 1999. http://dx.doi.org/10.2172/827171.

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Barr, Mary E., Richard A. Bartsch, and Gordon D. Jarvinen. New Anion-Exchange Resins for Improved Separations of Nuclear Material. Office of Scientific and Technical Information (OSTI), June 2000. http://dx.doi.org/10.2172/827177.

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Lockridge, J. New selective anion-exchange resins for nitrate removal from contaminated drinking water and studies on analytical anion-exchange chromatography. Office of Scientific and Technical Information (OSTI), January 1990. http://dx.doi.org/10.2172/6949580.

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Bartsch, R. A., Z. Y. Zhang, S. Elshani, W. Zhao, G. D. Jarvinen, M. E. Barr, S. F. Marsh, and R. M. Chamberlin. Sorption of Pu(IV) from nitric acid by bifunctional anion-exchange resins. Office of Scientific and Technical Information (OSTI), June 1999. http://dx.doi.org/10.2172/350863.

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Barr, M. E. New anion-exchange resins for improved separations of nuclear materials. Mid-year progress report. Office of Scientific and Technical Information (OSTI), June 1997. http://dx.doi.org/10.2172/13729.

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Morgan, I. L., and W. D. Bostick. Performance testing of grout-based waste forms for the solidification of anion exchange resins. Office of Scientific and Technical Information (OSTI), October 1990. http://dx.doi.org/10.2172/6469167.

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Gu, B. Selective Anion Exchange Resins for the Removal of Perchlorate [(CIO{sub 4}{sup -})] from Groundwater. Office of Scientific and Technical Information (OSTI), May 1999. http://dx.doi.org/10.2172/814239.

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