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Journal articles on the topic 'Dowex'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Kurańska, Maria, and Magdalena Niemiec. "Cleaner Production of Epoxidized Cooking Oil Using A Heterogeneous Catalyst." Catalysts 10, no. 11 (2020): 1261. http://dx.doi.org/10.3390/catal10111261.

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A cleaner solvent-free process of used cooking oil epoxidation has been developed. The epoxidation reactions were carried out using “in situ”-formed peroxy acid. A variety of ion exchange resins with different cross-linking percentages and particle sizes such as Dowex 50WX2 50-100, Dowex 50WX2 100-200, Dowex 50WX2 200-400, Dowex 50WX4 50-100, Dowex 50WX4 100-200, Dowex 50WX4 200-400, Dowex 50WX8 50-100, Dowex 50WX8 100-200, Dowex 50WX8 200-400 were used in the synthesis as heterogeneous catalysts. No significant effect of the size as well as porosity of the catalysts on the properties of the f

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2

Panraksa, Pattaraporn, Kasidech Boonsermsukcharoen, Kyu-Mok Hwang, Eun-Seok Park, and Pensak Jantrawut. "Taste Masking of Nizatidine Using Ion-Exchange Resins." Processes 7, no. 11 (2019): 779. http://dx.doi.org/10.3390/pr7110779.

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The purpose of this study was to mask the bitter taste of nizatidine (NZD) using cation-exchange resins. Amberlite IRP-69 and Dowex-50 containing cross-linked polystyrene backbones were used. The drug resin complexes were prepared by batch process using drug: resin ratios of 1:1, 1:3, and 1:5. The optimum drug: resin ratio and the time required for maximum percentage drug loading into the complexes were determined. The selected drug-resin complexes were evaluated for morphology, drug release, and taste. The NZD-Dowex complex was obtained at a drug: resin ratio of 1:5 using a stirring time of 1

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3

Ding, Wei Ping, Li Li Zou, Ying Ying Pei, Si Jie Sun, and Da Yong Gao. "Detoxification Capabilities of Adsorbents for Artificial Liver Support Devices: A Comparison." Advanced Materials Research 936 (June 2014): 789–94. http://dx.doi.org/10.4028/www.scientific.net/amr.936.789.

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Adsorption performances of activated carbon Norit RO 0.8, neutral resin Amberlite XAD-7, anion resin Dowex 1x4 and cation resin Dowex 50wx4 were investigated in detail for artificial liver support devices. Firstly, equilibrium adsorption experiments of these adsorbents to albumin, creatinine, bilirubin, tryptophan and cholic acid were conducted respectively. Then their adsorption capacities were obtained by curve fitting. The results indicate that activated carbon Norit RO 0.8 and anion resin Dowex 1x4 are two better adsorbents for removing toxins. Lastly, adsorption rate constants of activate

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4

Danko, Bożena, Rajmund S. Dybczyński, Zbigniew Samczyński, et al. "Ion exchange investigation for recovery of uranium from acidic pregnant leach solutions." Nukleonika 62, no. 3 (2017): 213–21. http://dx.doi.org/10.1515/nuka-2017-0031.

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Abstract The article describes studies on the separation of uranium from acid pregnant leach solutions obtained from Polish uranium ores: dictyonema shales and sandstone rocks. Ion exchange chromatography was applied for uranium sorption, using commercially available, strongly basic anion exchanger, Dowex 1. In model experiments, the influence of degree of crosslinking of Dowex 1 on the efficiency of uranium extraction was investigated. The effect of H2SO4 concentration on the breakthrough curve of uranyl ions for the Dowex 1 resins, of different crosslinking: X4, X8 and X10, was examined. Une

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Takahashi, Eri, Jérôme Ledauphin, Didier Goux, and Francis Orvain. "Optimising extraction of extracellular polymeric substances (EPS) from benthic diatoms: comparison of the efficiency of six EPS extraction methods." Marine and Freshwater Research 60, no. 12 (2009): 1201. http://dx.doi.org/10.1071/mf08258.

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There is no universal method that can be applied to extract bound extracellular polymeric substances (EPS) from benthic diatoms of intertidal sediments without causing cell lysis. Six extraction methods were tested on a diatom culture of Navicula jeffreyi to establish the best compromise between high yields of carbohydrate extraction and minimum cell lysis. Extraction with distilled water provoked cell lysis (as already known). The five other extraction methods (dowex resin, artificial seawater of half salinity and extractions after pretreatment with gluteraldehyde by three methods: water, dow

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6

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 (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 %) wer

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7

Geidarov, A. A., N. I. Abbasova, Sh E. Bakhramova, Z. A. Jabbarova, R. Y. Badalova та G. I. Alyshanly. "ADSORPTION OF IRON(III) IONS FROM SULFURIC ACID SOLUTIONS BY DOWEX G-26 RESIN (Н)". Azerbaijan Chemical Journal, № 1 (22 лютого 2024): 52–59. http://dx.doi.org/10.32737/0005-2531-2024-52-59.

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The adsorption of iron (III) from sulfuric acid solutions on a strongly acidic cation-exchange resin Dowex G-26 (H) has been studied. The factors influencing the adsorption of iron (III) have been investigated: solution pH, contact duration, adsorbent dose, initial concentration of iron (III) in solution. The obtained results show that Dowex G-26 (H) resin has a high exchange capacity for iron (III) ions from sulfuric acid solutions. Complete adsorption of iron (III) was achieved at pH2 (99%). Based on the experimental results, Langmuir and Freindlich adsorption isotherms have been constructe

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8

Altshuler, Heinrich N., Vladimir N. Nekrasov, and Olga H. Altshuler. "Ion exchange in the system: DOWEX 50 sulfocationite, aqueous solution of Cu(NO3)2 and pyridine-2-carboxylic acid." Vestnik Тomskogo gosudarstvennogo universiteta. Khimiya, no. 34 (2024): 79–88. http://dx.doi.org/10.17223/24135542/34/7.

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Coordination compounds of inorganic cations with biologically active substances are of considerable interest due to the fact that they have more pronounced pharmacological properties than free ligands. Immobilization of coordination compounds in ion exchangers facilitates the implementation of specified pharmacokinetics, provides significant prospects in matters of conservation and storage of bioactive substances, and allows for targeted delivery of the active component to the site of the disease. Previously, the ligand sorption of pyridine-3-carboxylic acid from its aqueous solution onto the

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9

Kingkaew, Wipawan, Thanis Kaewwiset, Uthen Thubsuang, Сhairat Siripattana, and Kamchai Nuithitikul. "Catalytic Oxidation of Furfural to Succinic Acid in the Presence of Sulfonic Resins." Key Engineering Materials 856 (August 2020): 182–89. http://dx.doi.org/10.4028/www.scientific.net/kem.856.182.

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This research investigates the application of three sulfonic resins (Amberlyst-15, Dowex-G26 and Dowex Monosphere-650C) as acid heterogeneous catalysts for oxidation reaction of furfural with hydrogen peroxide solution. The reaction was carried out in a batch reactor with varied reaction time (4-24 h) and temperature (70-90 °C). The sulfonic resins were characterized as to their structure and chemical composition by N2 adsorption-desorption isotherm, Fourier transformed-infrared (FTIR) spectroscopy, acid-base titration, and scanning electron microscopy (SEM). The results showed that all three

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10

Datta, Arup, and Samiran Halder. "Dowex 50W: Mild Efficient Reusable Heterogeneous Catalyst for Synthesis of Quinoxaline Derivatives in Aqueous Medium." Oriental Journal Of Chemistry 36, no. 6 (2020): 1218–24. http://dx.doi.org/10.13005/ojc/360629.

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An efficient, simple and eco-friendly procedure is reported in presence of heterogeneous Dowex 50W catalyst in aqueous medium under refluxing condition to produce quinoxaline derivatives. Catalyst has participated in condensation reaction between 1,2-diamines and various aromatic 1,2-diketones smoothly with excellent yield of the products in short reaction times. Dowex 50W was used more than five times in this reaction separately and showed an excellent recyclability throughout the reaction.

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11

Suwannahong, Kowit, Jiyapa Sripirom, Chadrudee Sirilamduan, et al. "Selective Chelating Resin for Copper Removal and Recovery in Aqueous Acidic Solution Generated from Synthetic Copper-Citrate Complexes from Bioleaching of E-waste." Adsorption Science & Technology 2022 (January 13, 2022): 1–14. http://dx.doi.org/10.1155/2022/5009124.

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This research focused on batch experiment using a new generation of chelating resins via an ion exchange process to describe the metabolic adsorption and desorption capacity onto iminodiacetic acid/Chelex 100, bis-pyridylmethyl amine/Dowex m4195, and aminomethyl phosphonic/Lewatit TP260 functional groups in bioleaching. The results showed that Dowex m4195 had the highest performance of adsorption capacity for copper removal in both H+-form and Na+-form. Results for Lewatit TP260 and Chelex 100 revealed lower adsorption performance than results for Dowex m4195. The investigation of desorption f

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12

Sukeesan, S., S. K. Boontanon, N. Boontanon, and S. Fujii. "Regeneration of Ion-Exchange Resins and Granular Activated Carbon with the Sonochemical Technique for Enabling Adsorption of Aqueous Per- and Polyfluoroalkyl Substances." IOP Conference Series: Earth and Environmental Science 973, no. 1 (2022): 012004. http://dx.doi.org/10.1088/1755-1315/973/1/012004.

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Abstract Regeneration of adsorbents for reuse is crucial for reducing operating costs and maintaining sustainable systems. Few researchers have studied the regeneration of sorbents without using chemical solvents or appropriate methods. The purpose of this study was to evaluate the feasibility of the sonochemical technique (ST) for the regeneration of granular activated carbon (GAC), a mixed cation and anion resin (DOWEX MB-50), and an anion resin (IRA910) for the removal of per- and polyfluoroalkyl substances (PFAS). The ST was performed at 120 kW, and the power density was 250 W L−1 for 30 m

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13

Muchtaridi, Muchtaridi, Elvan Kamal, Anas Subarnas, and Abdul Mutalib. "Application of Ion-Exchange Resin Column for Basic Development of Strontium-90/Yttrium-90 Generator for Preparation of Radiopharmaceutical Therapy." Indonesian Journal of Chemistry 17, no. 1 (2017): 15. http://dx.doi.org/10.22146/ijc.23581.

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The aim of this study is to examine the possible use of ion-exchange resin on Dowex AG 50x8 in separating Y-90 from Sr-90 which then could be applied in the basic of manufacture of producing Sr-90/Y-90 generator for the production of radiopharmaceutical cancer therapy. The findings showed that a distributive coefficient of Sr-90 and Y-90 with HCl 6 N solvent showed that distributive coefficient of Sr-90 in cation-exchange resin on Dowex 50x8 was greater than Y-90. Y-90 in HCl 6 N solvent was more easily eluted, while Sr-90 was bound to resin.. In conclusion, resin on Dowex AG 50x8 with HCl 6 N

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14

Suwannahong, Kowit, Chadrudee Sirilamduan, Anat Deepatana, Torpong Kreetachat, and Surachai Wongcharee. "Characterization and Optimization of Polymeric Bispicolamine Chelating Resin: Performance Evaluation via RSM Using Copper in Acid Liquors as a Model Substrate through Ion Exchange Method." Molecules 27, no. 21 (2022): 7210. http://dx.doi.org/10.3390/molecules27217210.

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Advanced technologies of electronics industries have led to environmental contamination concerns, especially waste print circuit boards containing a very high concentration of copper (II) ions, which can be discharged in wastewater containing many contaminated metals. A low pH is a necessity for treating industrial wastewater containing heavy metals to meet engineering process design. A novel polymeric bispicolamine chelating resin, Dowex-M4195, was applied as an alternative for investigating the behavior of copper (II) in acidic solution via an ion exchange method in a batch experiment system

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15

Felipe, Elaine Cristina Batista, and Ana Claudia Queiroz Ladeira. "ESTUDO DA SEPARAÇÃO DO PAR ZIRCÔNIO E HÁFNIO POR TROCA IÔNICA." HOLOS 3 (July 3, 2014): 291. http://dx.doi.org/10.15628/holos.2014.1769.

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O zircônio e o háfnio são dois importantes metais para a indústria nuclear. O háfnio ocorrer em todos os minérios de zircônio na faixa de 2 - 3%. Entretanto, o uso do zircônio na indústria nuclear exige que o háfnio esteja em concentrações menores que 100 mg Kg-1. O atual trabalho consiste na separação do par zircônio e háfnio pelo método de troca iônica a fim de se obter um concentrado de zircônio de alta pureza. Os licores de zircônio e háfnio foram produzidos a partir da lixiviação de seus hidróxidos Zr(OH)4 e Hf(OH)4 em meio nítrico por 24 horas. A partir destes dois licores foi preparada

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16

Altshuler, Heinrich, Elena Ostapova, Olga Altshuler, et al. "Nicotinic acid in nanocontainers. Encapsulation and release from ion exchangers." ADMET and DMPK 7, no. 1 (2019): 76–87. http://dx.doi.org/10.5599/admet.626.

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The paper is devoted to the study of the ion exchange encapsulation of nicotinic acid in nanocontainers on polymer matrices. Dowex-50 cation exchanger, sulphonated polymer based on metacyclophanoctol, polymer zirconium phosphate, and strongly basic Dowex-1 anion exchanger are used as polymer matrices. It was confirmed that commercial ion exchangers can encapsulate up to 0.64 g of nicotinic acid per gram of polymer. The high elution rate of nicotinic acid from nanocontainers via the ion exchange mechanism makes it possible to achieve the desired pharmacokinetics of drug release in vivo.

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17

Turhanen, Petri A., and Jouko J. Vepsäläinen. "A powerful tool for acid catalyzed organic addition and substitution reactions." RSC Advances 5, no. 33 (2015): 26218–22. http://dx.doi.org/10.1039/c4ra17321j.

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18

Noerpitasari, Erlina, Noviarty Noviarty, Iis Haryati, et al. "Optimization of Neodymium Separation from Cerium and Samarium for Nuclear Fuel Burn-Up Determination." Materials Science Forum 1093 (July 21, 2023): 113–18. http://dx.doi.org/10.4028/p-hwq49k.

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Sorption behavior of neodymium (Nd) from cerium (Ce) and samarium (Sm) on anion-exchange resins was investigated by column techniques. The anion exchange studies involved the sorption of Nd, Ce and Sm ions onto Dowex 1-X4 (100–200 mesh) in nitric acid – methanol medium. Separation of neodymium from cerium and samarium was carried out by column method to find out the best separation parameter condition with variating HNO3 concentration and weight of resin. The best elution profile was found using 0.3M HNO3 : methanol (1 : 9) as eluent through 1.25 grams of Dowex 1-X4 resin with 97.16 % Sm recov

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19

Hashemi, Mohammed M., and Yousef A. Beni. "Nickel (II) and Iron (II) / Dowex 50W: An Effective Catalyst for the Baeyer–Villiger Oxidation of Ketones using Molecular Oxygen and Benzaldehyde." Journal of Chemical Research 2000, no. 4 (2000): 196–97. http://dx.doi.org/10.3184/030823400103166931.

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20

Noor, Ehteram A., and Fatma M. Al-Solmi. "Analysis of Adsorption, Ion Exchange, Thermodynamic Behaviour of Some Organic Cations on Dowex 50WX4-50/H+Cation Exchanger in Aqueous Solutions." E-Journal of Chemistry 8, s1 (2011): S171—S188. http://dx.doi.org/10.1155/2011/963603.

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The equilibrium adsorption, ion exchange characteristics of various concentrations of some organic cations from aqueous solutions onto dowex 50WEX/H+cation exchanger were studied at different temperatures in the range of 30-50 °C. The studied cations showed good adsorptive properties onto dowex 50WX4-5/H+at different concentrations and temperatures. Main adsorption behaviour was ion exchange between hydrogen ions and the organic cations as indicated from the linear relation between the initial concentration of the organic cations and the released hydrogen ions. It was found that the adsorption

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21

Baimukhanova, Ayagoz, Elena Chakrova, Dimitr Karaivanov, Jan Kozempel, Frank Roesch, and Dmitriy Filosofov. "Production of the positron-emitting radionuclide 68Ga: the radiochemical scheme of radionuclide generator 68Ge → 68Ga." Chemical Bulletin of Kazakh National University, no. 2 (June 30, 2018): 20–26. http://dx.doi.org/10.15328/cb1003.

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68Ga (T1 / 2 = 68 min) in complexes with peptides is used in positron emission tomography for diagnostics of neuroendocrine tumors. The most promising strategy for 68Ga production is usage of the radionuclide generator 68Ge → 68Ga. In this research, the sorption behavior of Ge(IV) and Ga (III) has been studied. The distribution coefficients (Kd) of Ge(IV) on the anion exchange (Dowex 1×8) and cation exchange (Dowex 50×8) resins in various ethanedioic and hydrochloric acid solutions were determined. For each ion exchange resin, four series of measurements were carried out, in which the concentr

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22

Yanlinastuti, Yanlinastuti, Arif Nugroho, Aslina Br Ginting, et al. "PEMISAHAN DAN ANALISIS 137Cs DALAM LARUTAN ELEMEN BAKAR UJI U3Si2/Al DENSITAS 4,8 gU/cm3 DENGAN BURNUP 60% MENGGUNAKAN METODE PENUKAR KATION." Urania : Jurnal Ilmiah Daur Bahan Bakar Nuklir 28, no. 3 (2022): 163. http://dx.doi.org/10.17146/urania.2022.28.3.6739.

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PEMISAHAN DAN ANALISIS 137Cs DALAM LARUTAN ELEMEN BAKAR UJI U3Si2/Al DENSITAS 4,8 gU/cm3 DENGAN BURNUP 60% MENGGUNAKAN METODE PENUKAR KATION. Telah dilakukan pemisahan dan analisis isotop cesium dalam PEB U3Si2/Al densitas4,8 gU/cm3 kode CBBJ 250 burnup 60% dengan metode penukar kation menggunakan zeolit Lampung dan resin Dowex. Tujuan penelitian adalah untuk mengetahui berat 137Cs di dalam PEB U3Si2/Al densitas 4,8 gU/cm3 burnup 60%. Potongan PEB U3Si2/Al pada bagian Bottom (B), Middle (M) dan Top (T) masing-masing secara duplo dilarutkan dengan HCl 6 M dan HNO3 6 M sehingga diperoleh larutan

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23

KEHAR, SINGH, and KUMARI KUSUM. "Electrochemical and Permeation Studies on Dowex-50 Supported Chloroplast Liquid Membranes." Journal of Indian Chemical Society Vol. 72, May 1995 (1995): 327–31. https://doi.org/10.5281/zenodo.5904913.

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Department of Chemistry, Gorakhpur University, Gorakhpur-273 009 <em>Manuscript received 26 April 1993, revised 10 September 1993, accepted 10 December 1993</em> Membrane potential and membrane conductance studies using Dowex-50 membrane, and sodium chloride and magnesium chloride solutions hale been carried out to study the effect of supported chloroplast liquid membrane on its electrochemical characteristics. Permeation characteristics of the membrane system under comparable experimental conditions have also been investigated.

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24

Abd El-Hamid, A. M., M. A. Zahran, S. M. Abou Elthana, F. M. Khalid, and H. M. Kamal. "Recovery of uranium, hafnium and zirconium from petroleum ash leach liquor." RSC Advances 5, no. 98 (2015): 80245–53. http://dx.doi.org/10.1039/c5ra11563a.

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25

Massoud, Ayman, F. Abou El-Nour, H. Killa, and U. Seddik. "Chromatographic separation of In(III) from Cd(II) in aqueous solutions using commercial resin (Dowex 50W-X8)." Open Chemistry 8, no. 3 (2010): 696–701. http://dx.doi.org/10.2478/s11532-010-0041-z.

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AbstractThis work assesses the potential of an adsorptive material, Dowex 50w-x8, for the separation of indium ions from cadmium ions in aqueous media. The adsorption behavior of Dowex 50 w-x8 for indium and cadmium ions was investigated. The effect of pH, initial concentration of metal ions, the weight of resins, and contact time on the sorption of each of the metal ions were determined. It was found that the adsorption percentage of the indium ions was more than 99% at pH 4.0. The result shows that In (III) was most strongly extracted, while Cd(II) was slightly extracted at this pH value. Th

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26

Niknam, Khodabakhsh, Ali Reza Kiasat, and Sadegh Karimi. "Dowex Polymer–Mediated Protection of Carbonyl Groups." Synthetic Communications 35, no. 17 (2005): 2231–36. http://dx.doi.org/10.1080/00397910500184651.

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27

Wołowicz, Anna, and Zbigniew Hubicki. "Sorption Behavior of Dowex PSR-2 and Dowex PSR-3 Resins of Different Structures for Metal(II) Removal." Solvent Extraction and Ion Exchange 34, no. 4 (2016): 375–97. http://dx.doi.org/10.1080/07366299.2016.1187983.

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28

Chan, Michael, Huu Doan, and Trong Dang-Vu. "An Investigation of Lanthanum Recovery from an Aqueous Solution by Adsorption (Ion Exchange)." Inorganics 12, no. 9 (2024): 255. http://dx.doi.org/10.3390/inorganics12090255.

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Lanthanum (La(III)) is one of the high-demand rare earth elements with applications in various products. However, La(III) in mining waste streams and electronic waste also poses environmental and health concerns. Therefore, the recovery of La(III) in the waste is needed. In the present study, the adsorption of La(III) with Dowex 50W-X8, Amberchrom50WX4, Amberlyst 15, and Amberchrom 50WX2 was evaluated using a shaker water bath. Dowex 50W-X8 was found to be the best adsorbent and was used to investigate the effect of the shaker speed (RPM = 50–150), adsorbent dosage (1.0–4.0 g), pH (2.0–7.0), a

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Alguacil, F. J. "Recovery of tetrachloroaurate through ion exchange with Dowex 11 resin." Revista de Metalurgia 34, Extra (1998): 376–80. http://dx.doi.org/10.3989/revmetalm.1998.v34.iextra.775.

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Okon, Edidiong, Habiba Shehu, and Edward Gobina. "An Experimental Analysis of Lactic Acid Esterification Process Using Langmuir-Hinshelwood Model." Key Engineering Materials 733 (March 2017): 36–41. http://dx.doi.org/10.4028/www.scientific.net/kem.733.36.

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In this study, esterification of lactic acid and ethanol to produce ethyl lactate using different cation-exchange resin catalysts was performed at 100 °C. The catalysts used for the esterification process were amberlyst 16 and dowex 50W8x cation-exchange resins. Two simplified mechanisms based on Langmuir-Hinshelwood model were employed to describe the components that adsorbed most on the surface of the catalysts. Fourier Transform Infrared (Nicolet iS10 FTIR) was employed to verify the rationality of the mechanisms. FTIR of the esterification product reflected C=O, H=O and C=C bonds on the sp

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31

Attallah, Mohamed F., Hoda E. Rizk, and El Sayed M. El Afifi. "Development of a radiochemical method for extraction chromatographic separation of Pb and Bi radioisotopes of forensic and environmental interest." Radiochimica Acta 108, no. 12 (2020): 989–98. http://dx.doi.org/10.1515/ract-2020-0026.

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AbstractThis work describes the purification and separation of some radionuclides of 210Pb and/or 210Bi that might be used in calibration of nuclear spectroscopic instruments for forensic purposes and environmental studies. The retention and desorption investigations have been done by Dowex HCR-S/S resin as the cationic exchanger by batch mode. Full retention of metal ions was achieved in 0.1 M HNO3 solution after an equilibration period of 2 h at room temperature. The uptake of Pb and Bi is reached to more than 95 and 85%, respectively. Desorption studies by several reagents indicated that 1

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32

Nursapina, Nurgul, Fatima Meiirman, Gulsana Amanova, and Ilona Matveyeva. "Study of effectiveness of strongly basic anion exchange resins in the process of uranium extraction from the underground leaching productive solution." Chemical Bulletin of Kazakh National University, no. 4 (December 28, 2018): 10–15. http://dx.doi.org/10.15328/cb979.

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The process of uranium sorption is one of the important stages in the production of uranium. This stage affects uranium extraction effectiveness from productive solutions. The sorption and desorption characteristic of anion exchange resins in dynamic condition were investigated in order to study the effectiveness of resins, which were used for extraction of uranium from sulfuric acid productive solution. The sorption and desorption of uranium from the productive solution on anion exchange resins AB-17 and DOWEX 1X8 200 was carried out in laboratory conditions. The sorption characteristics were

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Inoue, H., M. Kagoshima, and K. Kaibara. "Effects of Anion Exchange Resin as Phosphate Binder on Serum Phosphate and Ipth Levels in Normal Rats." International Journal of Artificial Organs 23, no. 4 (2000): 243–49. http://dx.doi.org/10.1177/039139880002300406.

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In order to investigate the characteristics of anion exchange resins that may safely and effectively bind dietary phosphate in digestive tract, phosphate binding experiments were carried out in vitro and in vivo with normal rats by comparing anion exchange resins, PAA-B (which has the same chemical structure as Sevelamer® HCl) and Dowe 1x8, with CaCO3. In in vitro phosphate binding experiments, PAA-B bound 32.3% less phosphate than CaCO3 at pH 7. In the rat dietary phosphorus excretion experiments, PAA-B, Dowex 1x8, and CaCO3 increased fecal phosphorus excretion by 62.7, 32.3, and 84.0%, respe

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Harbi, Soumaya, Fatma Guesmi, Dorra Tabassi, Chiraz Hannachi, and Bechir Hamrouni. "Application of response surface methodology and artificial neural network: modeling and optimization of Cr(VI) adsorption process using Dowex 1X8 anion exchange resin." Water Science and Technology 73, no. 10 (2016): 2402–12. http://dx.doi.org/10.2166/wst.2016.091.

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We report the adsorption efficiency of Cr(VI) on a strong anionic resin Dowex 1X8. The Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) analysis of this adsorbent were investigated. Response surface methodology was applied to evaluate the main effects and interactions among initial pH, initial Cr(VI) concentration, adsorbent dose and temperature. Analysis of variance depicted that resin dose and initial pH were the most significant factors. Desirability function (DF) showed that the maximum Cr(VI) removal of 95.96% was obtained at initial pH 5, initial Cr(VI) concentr

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Singare, P. U. "Radiotracer Technique in Study of Strongly Basic Anion Exchange Resins Dowex-SBR LC and Indion-454." International Letters of Chemistry, Physics and Astronomy 18 (September 2013): 37–49. http://dx.doi.org/10.18052/www.scipress.com/ilcpa.18.37.

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The present paper demonstrates application of isotopic tracer technique in characterization of anion exchange resins Dowex-SBR LC and Indion-454 for which 131I and 82Br radio isotopes were used. The characterization was made based on iodide and bromide ion-isotopic exchange reaction kinetic data obtained for the two resins. It was observed that during iodide ion-isotopic exchange reaction performed at 35.0 °C, 1.000 g of ion exchange resins and 0.002 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of ion exchanged (mmol), initial rate of ion exchange (mm

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Singare, P. U. "Radiotracer Technique in Study of Strongly Basic Anion Exchange Resins Dowex-SBR LC and Indion-454." International Letters of Chemistry, Physics and Astronomy 18 (September 28, 2013): 37–49. http://dx.doi.org/10.56431/p-p17eh4.

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The present paper demonstrates application of isotopic tracer technique in characterization of anion exchange resins Dowex-SBR LC and Indion-454 for which 131I and 82Br radio isotopes were used. The characterization was made based on iodide and bromide ion-isotopic exchange reaction kinetic data obtained for the two resins. It was observed that during iodide ion-isotopic exchange reaction performed at 35.0 °C, 1.000 g of ion exchange resins and 0.002 mol/L labeled iodide ion solution, the values of specific reaction rate (min-1), amount of ion exchanged (mmol), initial rate of ion exchange (mm

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Bąk, Justyna, Weronika Sofińska-Chmiel, Maria Gajewska, Paulina Malinowska, and Dorota Kołodyńska. "Determination of the Ni(II) Ions Sorption Mechanism on Dowex PSR2 and Dowex PSR3 Ion Exchangers Based on Spectroscopic Studies." Materials 16, no. 2 (2023): 644. http://dx.doi.org/10.3390/ma16020644.

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This paper estimates the suitability of the strongly basic anion exchangers, Dowex PSR2 and Dowex PSR3, as sorbents of nickel ions in aqueous solutions. These actions are aimed at searching for new solutions due to the growing discharge of nickel into wastewaters, primarily due to its addition to steel. The nickel sorption experiments were conducted under static conditions and resulted in the optimization of pH, phase contact time, initial solution concentration, and temperature. The next step was to calculate the kinetic, isothermal, and thermodynamic parameters. Moreover, the ion exchangers

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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 affiniti

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Riani, Josiane Costa, Versiane Albis Leão Carlos, and Carlos Antônio da Silva. "Efeito estrutura da matriz na adsorção de cianocomplexos metálicos em resinas de poliestireno." Rem: Revista Escola de Minas 57, no. 2 (2004): 115–20. http://dx.doi.org/10.1590/s0370-44672004000200008.

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O objetivo desse trabalho é a utilização de resinas de troca-iônica, base forte, na adsorção de cianocomplexos metálicos, visando a sua reciclagem. São utilizadas soluções sintéticas que simulam diferentes efluentes da lixiviação do minério de ouro, contendo concentrações de ferro, de zinco e de cobre, variando entre 50 e 500mg/l. São realizados ensaios de adsorção, em batelada, utilizando dois tipos de resinas comerciais: Ionac SR-7 (matriz de poliestireno, tripropilamônio quaternário como grupo de troca) e Dowex 1X8 (matriz de poliestireno, trimetilamônio quaternário como grupo de troca). Em

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Mulazimoglu, A. Demir, I. E. Mulazimoglu, and E. Ozkan. "Preconcentration with 1-Nitroso-2-naphthol Complexes on Dowex MWC-1 Resin: Determination of Cu and Zn at Trace Level in Drinking Water Samples by ICP-AES." E-Journal of Chemistry 6, no. 4 (2009): 1176–80. http://dx.doi.org/10.1155/2009/734525.

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In this study, copper(II) and zinc(II) were quantitatively determined in drinking water using ICP-AES after preconcentration. For this purpose, the water samples were treated with 1-nitroso-2-naphthol to form metal complexes on Dowex MWC-1 resin. Prior to the sorption process, the column was treated with a chelating resin Dowex MWC-1 and the column was prepared by passing buffer solution at different pH values. These columns were used for the transportation of water samples through the resin at the flow rate of 2.00 mL min-1. The effluents were then analyzed by ICP-AES using standard addition

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Nugroho, Arif, Yusuf Nampira, and Yanlinastuti Yanlinastuti. "ANALISIS RADIONUKLIDA 235U DALAM PELAT ELEMEN BAKAR U3Si2-Al PASCA IRADIASI MENGGUNAKAN METODE SPEKTROMETRI ALFA." Jurnal Forum Nuklir 8, no. 2 (2017): 131. http://dx.doi.org/10.17146/jfn.2014.8.2.3704.

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ANALISIS RADIONUKLIDA 235U DALAM PELAT ELEMEN BAKAR U3Si2-Al PASCA IRADIASI MENGGUNAKAN METODE SPEKTROMETRl ALFA. Telah dilakukan Analisis Radionuklida 235U dalam Pelat Elemen Bakar (Peb) U3Si2-Al Pasca lradiasi. PEB di samping mengandung sisa uranium juga mengandung bahan lain, seperti hasil belah dan hasil biak serta bahan kelongsong elemen bakar nuklir. Kandungan uranium di dalam bahan bakar pasca iradiasi tersebut dianalisis menggunakan metode spektrometri-α . Agar aualisis memberikan hasil yang akurat maka uranium tersebut perlu dipisahkau dari unsur lain yang dapat menyerap radiasi-α dan

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Naskar, Nabanita, and Susanta Lahiri. "Separation of 71,72As from alpha particle induced gallium oxide target by solid cation and anion exchangers, DOWEX-50 and DOWEX-1." Applied Radiation and Isotopes 176 (October 2021): 109876. http://dx.doi.org/10.1016/j.apradiso.2021.109876.

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Kostrzewa, Milena, Katarzyna Staszak, Dobrochna Ginter-Kramarczyk, et al. "Chromium(III) Removal from Nickel(II)-Containing Waste Solutions as a Pretreatment Step in a Hydrometallurgical Process." Materials 15, no. 18 (2022): 6217. http://dx.doi.org/10.3390/ma15186217.

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This paper presents Cr(III) removal from nickel sulfate waste solutions as a pretreatment step for the modification of hydrogen storage alloys. Adsorption with two cation exchange resins, Dowex G26 (strongly acidic) and MAC-3 (weakly acidic), and precipitation with various solutions were chosen as simple operations for Cr(III) removal from waste solutions. The adsorption of Cr(III) was investigated for both model and real waste nickel solutions. Dowex G26 appeared to be more efficient in Cr(III) removal (RCr(III) from 43 to 80%) than MAC-3 (RCr(III) from 40 to 53%). However, the adsorption fro

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Wu, Yu-Chi, Yu-Hong Wei, and Ho-Shing Wu. "Adsorption and Desorption Behavior of Ectoine Using Dowex® HCR-S Ion-Exchange Resin." Processes 9, no. 11 (2021): 2068. http://dx.doi.org/10.3390/pr9112068.

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Dowex® HCR-S ion-exchange resin was used to adsorb ectoine in a batch system under varying operation conditions in terms of contact time, temperature, pH value, initial concentration of ectoine, and type of salt. Six adsorption isotherm models (Langmuir, Freundlich, Temkin, Dubinin–Radushkevich, Sips, and Redlich–Peterson) and three kinetic models (pseudo-first-order, pseudo-second-order, and intraparticle diffusion) were used to investigate the ectoine adsorption mechanism of ion-exchange resin. According to the experimental results, the mechanism of ectoine adsorption using an ion exchanger

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Suwannahong, Kowit, Surachai Wongcharee, Torpong Kreetachat, et al. "Comprehensive Cost–Benefit and Statistical Analysis of Isotherm and Kinetic Models for Heavy Metal Removal in Acidic Solutions Using Weakly Base Polymeric Chelating Resin as Adsorbent." Water 16, no. 17 (2024): 2384. http://dx.doi.org/10.3390/w16172384.

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This study investigates the removal of heavy metals, particularly copper and nickel, from acidic aqueous solutions using the weakly base polymeric chelating resin Dowex M-4195. The research conducts comprehensive cost–benefit and statistical analyses of various kinetic and isotherm adsorption models. The results show that the PSO and general order models provide high accuracy for the Cu2⁺ adsorption kinetics, while the Avrami fractional order model excels for Ni2⁺. In terms of the isotherm models, the Langmuir and Jovanovic models are highly accurate for both metals, with the Toth model being

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Nuraini, Siti, Suheryanto Suheryanto, and Poedji Loekitowati Hariani. "Preconcentration of Cr(III) Using Dowex 50WX2-200 Resin and Its Application to River Water." Indonesian Journal of Fundamental and Applied Chemistry 8, no. 2 (2023): 105–9. http://dx.doi.org/10.24845/ijfac.v8.i2.105.

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Cr(III) is one of the most stable chromium species in nature, Cr(III) species are not carcinogenic to humans, but if the levels in the body exceed 0.2 mg / day it is very dangerous for the body especially in the respiratory tract. The presence of chromium in the aquatic environment is so low that it is very difficult to detect it using instruments with various limitations to detect it, therefore preconcentration techniques are carried out to overcome the issue. In this study the water sample was adjusted pH using HNO3 0.1 M or NaOH 0.1 M, after which it was passed in the dowex column 50WX2-200

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Kołodyńska, Dorota, Aleksandra Łyko, Marzena Gęca, and Zbigniew Hubicki. "Chlorates(VII) removal on Dowex™PSR-2 resin." Annales Universitatis Mariae Curie-Sklodowska, sectio AA – Chemia 71, no. 1 (2016): 105. http://dx.doi.org/10.17951/aa.2016.71.1.105.

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<p>Lately there has been observed the increased presence of chlorates(VII) in the natural environment which can affect human health negatively. Therefore the removal of chlorate(VII) ions using the gel type resin functionalized with the tri-n-butyl ammonium (Dowex<sup>™</sup>PSR-2) from waters was studied. The main aim was to evaluate the effects of experimental conditions including contact time, initial solution concentration, pH and temperature on chlorate(VII) ions removal as well as the anion exchanger properties on chlorate(VII) ions sorption. It was found that only the

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Košmrlj, J., M. Kočevar, and S. Polanc. "A New Convenient Bromination with KBrO3/KBr/Dowex®." Synthetic Communications 26, no. 19 (1996): 3583–92. http://dx.doi.org/10.1080/00397919608003769.

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Cadenas, S., M. B. Jekabsons, A. M. Carroll, R. K. Porter, and M. D. Brand. "Rat muscle mitochondria treated with dowex are GDP insensitive." Biochemical Society Transactions 29, no. 5 (2001): A123. http://dx.doi.org/10.1042/bst029a123c.

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Альтшулер, Г. Н., Е. В. Остапова, С. Ю. Лырщиков, Н. С. Захаров та О. Г. Альтшулер. "Сорбция пиколиновой кислоты и железа (III) сульфокатионитом Dowex 50". Журнал физической химии 97, № 10 (2023): 1488–93. http://dx.doi.org/10.31857/s0044453723100035.

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