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Öğe Amberlite IRA-400 and IRA-743 chelating resins for the sorption and recovery of molybdenum(VI) and vanadium(V): Equilibrium and kinetic studies(Elsevier Science Bv, 2017) Polowczyk, Izabela; Cyganowski, Piotr; Urbano, Bruno F.; Rivas, Bernabe L.; Bryjak, Marek; Kabay, NalanIn this study, commercial polymers containing N-methyl-D-glucamine-quaternary ammonium ion-exchange ligands were subjected to a series of sorption tests. Mo(VI) and V(V) sorption were performed using strong (Amberlite IRA-400) and weak (Amberlite IRA-743) ion-exchange resins as adsorbents under equilibrium and kinetic conditions. The tests involved evaluating the influence of the adsorbent dose, pH, and temperature. The adsorbed Mo(VI) and V(V) levels reached maximum values at fixed pHs of 6.0 and 4.0 for IRA-400 and IRA-743, respectively. The maximum Mo(VI) and V(V) batch uptakes were determined to be 208 and 177 mg.g(-1) for IRA-743 and IRA-400, respectively. The increase in temperature resulted in increasing Mo(VI) and V(V) sorption capacities for both resins, indicating the endothermic nature of the process. The most rapid adsorption equilibrium was achieved after 30 min during sorption of Mo(VI) on the IRA-400 resin, which resulted in the removal of nearly all metal from the solution. Molybdenum and vanadium adsorption/desorption cycles were performed to estimate the adsorbent lifetime, and good efficiency was observed during three cycles of elution and reuse. FTIR analysis confirmed the presence of Mo and V species within the structures of the IRA-400 and IRA-743 resins after the sorption process. (C) 2017 Elsevier B.V. All rights reserved.Öğe ARSENIC SORPTION USING MIXTURES OF ION EXCHANGE RESINS CONTAINING N-METHYL-D-GLUCAMINE AND QUATERNARY AMMONIUM GROUPS(Soc Chilena Quimica, 2016) Ozkula, Gulsah; Urbano, Bruno F.; Rivas, Bernabe L.; Kabay, Nalan; Bryjak, MarekThe method of synthesis and the arsenic removal properties of ion-exchange resins based on N-methyl-D-glucamine and trimethylammonium groups are presented. The N-methyl-D-glucamine based monomer was synthesized by the reaction of 4-vinyl benzyl chloride with N-methyl-D-glucamine, along with the use of N, N-methylene-bis-acrylamide as a crosslinker reagent for polymerization. In addition, poly(4-vinylbenzyl) trimethylammonium was synthesized. Arsenate sorption studies were conducted and the pH effect, kinetics, sorption capacity, and elution performance were studied. The experimental data were fitted to kinetic models, such as the pseudo-first order and pseudo-second order models. The pseudo-second order model exhibited the best correlation with the experimental data. The Langmuir and Freundlich isotherms were fitted to the experimental data, and the Freundlich isotherm exhibited the best fit.Öğe A comparative study of removal of Cr(VI) by ion exchange resins bearing quaternary ammonium groups(Wiley, 2014) Kusku, Ozge; Rivas, Bernabe L.; Urbano, Bruno F.; Arda, Muserref; Kabay, Nalan; Bryjak, MarekBACKGROUNDIon exchange resins based on poly[(4-vinylbenzyl) trimethylammonium chloride] P(ClVBTA) and poly[(3-acrylamidopropyl) trimethyl ammonium chloride] P(ClAPTA) were synthesized by radical polymerization. Metal ion uptake experiments were run with these synthesized resins and compared with the commercially available anion exchange resin Amberlite IRA-400. RESULTSRetention of Cr(VI) was found to be independent of pH and the co-existence of Cl- and SO42- ions for two resins. The sorption data obtained were evaluated using well-known kinetic and adsorption isotherm models. The kinetic data obtained for the two resins fitted well to the pseudo-second-order model and the Langmuir isotherm. Besides, it was observed that temperature influenced slightly the sorption properties of the ion exchange resins synthesized in this study and commercially available ion exchange resin Amberlite IRA-400. CONCLUSIONSThe synthetic resins showed a better sorption performance than a commercially available ion exchange resin. The P(ClVBTA) and P(ClAPTA) resins exhibited greater and faster sorption than Amberlite IRA-400. Sorption capacities of these ion exchangers were found to be in the order P(ClAPTA)>P(ClVBTA)>Amberlite IRA-400. (c) 2014 Society of Chemical Industry.Öğe Equilibrium and kinetic study of chromium sorption on resins with quaternary ammonium and N-methyl-D-glucamine groups(Elsevier Science Sa, 2016) Polowczyk, Izabela; Urbano, Bruno F.; Rivas, Bernabe L.; Bryjak, Marek; Kabay, NalanThe equilibrium and kinetics of chromium (VI) adsorption on a new synthesized resin containing both N-methyl-D-glucamine and quaternary ammonium functional groups P(VbNMDG-co-ClVBTA) have been presented. The results obtained for the new copolymer were compared with those for two commercial resins, namely Amberlite IRA-743 and IRA-400, containing only N-methyl-D-glucamine and quaternary ammonium functional groups, respectively. The effect of adsorbent dose, pH, temperature, and interfering ions on chromium removal was studied. The maximum chromium uptake for the copolymer was 677.9 mg g(resin)(-1) at pH 4-5, while those for IRA-400 and IRA-743 were 893.4 and 316.6 mg g(resin)(-1), respectively. Chloride and sulfate anions did not exhibit an effect on chromium sorption for the copolymer and IRA-400; however, sorption on the IRA-743 resin was affected. The adsorption kinetics and isotherms as well as thermodynamic parameters were evaluated. Increasing temperature decreased the chromium adsorption for both commercial and synthesized resins, revealing the exothermic nature of the process. The Freundlich and Langmuir isotherm models were used to describe the adsorption of Cr(VI) onto resins. Kinetic studies revealed that Cr(VI) reached over 99% removal at 10, 30, and 240 min for the copolymer, IRA-400, and IRA-743, respectively. Chromium adsorption/desorption cycles were performed to estimate the adsorbent lifetime, where the copolymer resin exhibited a better performance than IRA-400, and IRA-743, achieving a high efficiency after 3 cycles. (C) 2015 Elsevier B.V. All rights reserved.Öğe Removal of boron from geothermal water by a novel boron selective resin(Elsevier, 2013) Santander, Paola; Rivas, Bernabe L.; Urbano, Bruno F.; Ipek, Idil Yilmaz; Ozkula, Gulsah; Arda, Muserref; Yuksel, Mithat; Bryjak, Marek; Kozlecki, Tomasz; Kabay, NalanIn this study, a novel chelating resin poly(N-(4-vinylbenzyl)-N-methyl-o-glucamine) (P(VbNMDG)) was synthesized. The sorption performance of this resin was compared with boron selective commercial resin Diaion CRB02 containing N-methyl-n-glucamine (NMDG) groups for boron removal from geothermal water. The P(VbNMDG) resin gave a higher sorption capacity and faster kinetics than that of Diaion CRB02 for boron removal from geothermal water. The kinetic data obtained were evaluated using classical kinetic models and diffusion/reaction models. It was concluded that both P(VbNMDG) and Diaion CRB02 resins obeyed pseudo second order kinetic model. Also, the rate controlling step of boron sorption was particle diffusion for both resins. The breakthrough profile of P(VbNMDG) resin for boron was sharper than that of Diaion CRB02. Thus, the degree of the column utilization of P(VbNMDG) resin was also high. The boron loaded on both resins was eluted using 5% H2SO4 solution with a percentage of around 80%. (C) 2012 Elsevier B.V. All rights reserved.Öğe Removal of boron from geothermal water by a novel boron selective resin(Elsevier, 2013) Santander, Paola; Rivas, Bernabe L.; Urbano, Bruno F.; Ipek, Idil Yilmaz; Ozkula, Gulsah; Arda, Muserref; Yuksel, Mithat; Bryjak, Marek; Kozlecki, Tomasz; Kabay, NalanIn this study, a novel chelating resin poly(N-(4-vinylbenzyl)-N-methyl-o-glucamine) (P(VbNMDG)) was synthesized. The sorption performance of this resin was compared with boron selective commercial resin Diaion CRB02 containing N-methyl-n-glucamine (NMDG) groups for boron removal from geothermal water. The P(VbNMDG) resin gave a higher sorption capacity and faster kinetics than that of Diaion CRB02 for boron removal from geothermal water. The kinetic data obtained were evaluated using classical kinetic models and diffusion/reaction models. It was concluded that both P(VbNMDG) and Diaion CRB02 resins obeyed pseudo second order kinetic model. Also, the rate controlling step of boron sorption was particle diffusion for both resins. The breakthrough profile of P(VbNMDG) resin for boron was sharper than that of Diaion CRB02. Thus, the degree of the column utilization of P(VbNMDG) resin was also high. The boron loaded on both resins was eluted using 5% H2SO4 solution with a percentage of around 80%. (C) 2012 Elsevier B.V. All rights reserved.Öğe Synthetic strong base anion exchange resins: synthesis and sorption of Mo(VI) and V(V)(Springer, 2018) Cyganowski, Piotr; Polowczyk, Izabela; Morales, Daniela V.; Urbano, Bruno F.; Rivas, Bernabe L.; Bryjak, Marek; Kabay, NalanThe result of synthesizing anion exchangers bearing trimethylammonium functionalities is presented. Ion exchange resins of poly(4-vinylbenzyltrimethylammonium chloride) (PVBTAC) (Resin 1) and poly(3-acrylamidopropyltrimethylammonium chloride) (PAPTAC) (Resin 2) were obtained via the radical polymerization technique and studies on the sorption of molybdenum and vanadium ions were conducted at 20, 30, and 40 degrees C using the batch method from single-component aqueous solutions. The greatest total sorption capacities were 198 mg Mo(VI) g(-1) at 20 degrees C and 193 mg V(V) g(-1) at 40 degrees C for Resin 1. The calculated thermodynamic parameters demonstrated that the sorption of Mo(VI) was an exothermic process, while the uptake of V(V) was endothermic. The kinetic studies revealed the compliance of the process with a quasi-second-order kinetic model. Simultaneously, equilibrium was achieved within 15 min in two rate-controlled stages. The fitting of the Langmuir and Freundlich mathematical models demonstrated the chemical character of the sorption processes. Elution and reuse studies showed that Mo(VI) may be completely recovered from both resins using a sodium carbonate solution. Moreover, the investigated materials are suitable for repeated sorption/desorption cycles.Öğe Water-Insoluble Copolymer Based on N-Methyl-D-glucamine and Quaternary Ammonium Groups with Capability to Remove Arsenic(Wiley-Blackwell, 2014) Urbano, Bruno F.; Paredes, Joel; Rivas, Bernabe L.; Kusku, Ozge; Kabay, Nalan; Bryjak, MarekThe synthesis and sorption performance of As(V) with a copolymer resin is presented. The resin was obtained via the radical polymerization of a 1:1 mixture of N-(4-vinyl benzyl)-N-methyl-D-glucamine and (4-vinyl benzyl)trimethyl ammonium chloride using N,N-methylene-bis-acrylamide as the crosslinker. The effect of pH, concentration, and time on the arsenic sorption was studied. The copolymer exhibited good performance over a wide pH range regardless of the initial concentrations. The equilibrium experiments presented better results under alkaline conditions (pH 9.0) compared with acidic conditions (pH 3.0). The kinetic sorption was quite fast, particularly at low arsenic concentrations. In addition, the arsenic anions were eluted with different acid/alkaline reagents, and the acid eluents exhibited the best results. (c) 2013 American Institute of Chemical Engineers Environ Prog, 33: 1187-1193, 2014
