Ion Exchange Equilibrium

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Gérald Pourcelly - One of the best experts on this subject based on the ideXlab platform.

Carlos Eduardo Borba - One of the best experts on this subject based on the ideXlab platform.

  • PredictIon of Ion Exchange Equilibrium of $$\hbox {Cu}^{2+}{-}\hbox {Na}^{+}{-}\hbox {Zn}^{2+}$$
    Adsorption, 2015
    Co-Authors: Eduardo Raizer, Carlos Eduardo Borba, Thiago Olinek Reinehr, Jamal Abd Awadallak, Edson Antnio Da Silva
    Abstract:

    The law of mass actIon (LMA) is generally used to describe the Equilibrium of Ion Exchange processes. This is a rigorous methodology in terms of thermodynamics and considers the non-idealities in the solid and solutIon phases. However, artificial neural networks (ANNs) can also be effectively used in phase Equilibrium modeling. In the current study, ANNs were used to describe the Ion Exchange Equilibrium in the binary systems $$\hbox {Cu}^{2+}{-}\hbox {Na}^+$$ Cu 2 + - Na + , $$\hbox {Zn}^{2+}{-}\hbox {Na}^+$$ Zn 2 + - Na + and $$\hbox {Zn}^{2+}{-}\hbox {Cu}^{2+}$$ Zn 2 + - Cu 2 + and in the ternary system $$\hbox {Cu}^{2+}{-}\hbox {Na}^{+}{-}\hbox {Zn}^{2+}$$ Cu 2 + - Na + - Zn 2 + , using the resin Amberlite IR 120 as Ion Exchanger. The datasets used in the training stage of the ANNs in this study were generated by the applicatIon of the LMA in the binary systems. Results showed that, in the Equilibrium modeling of the binary systems and in the predictIon of the ternary system, the two methodologies had similar performance and can be used to describe binary and ternary Equilibrium.

  • PredictIon of Ion Exchange Equilibrium of \hbox {Cu}^{2+}{-}\hbox {Na}^{+}{-}\hbox {Zn}^{2+} ternary system using artificial neural networks
    Adsorption-journal of The International Adsorption Society, 2014
    Co-Authors: Eduardo Raizer, Carlos Eduardo Borba, Thiago Olinek Reinehr, Jamal Abd Awadallak, Edson Antnio Da Silva
    Abstract:

    The law of mass actIon (LMA) is generally used to describe the Equilibrium of Ion Exchange processes. This is a rigorous methodology in terms of thermodynamics and considers the non-idealities in the solid and solutIon phases. However, artificial neural networks (ANNs) can also be effectively used in phase Equilibrium modeling. In the current study, ANNs were used to describe the Ion Exchange Equilibrium in the binary systems \(\hbox {Cu}^{2+}{-}\hbox {Na}^+\), \(\hbox {Zn}^{2+}{-}\hbox {Na}^+\) and \(\hbox {Zn}^{2+}{-}\hbox {Cu}^{2+}\) and in the ternary system \(\hbox {Cu}^{2+}{-}\hbox {Na}^{+}{-}\hbox {Zn}^{2+}\), using the resin Amberlite IR 120 as Ion Exchanger. The datasets used in the training stage of the ANNs in this study were generated by the applicatIon of the LMA in the binary systems. Results showed that, in the Equilibrium modeling of the binary systems and in the predictIon of the ternary system, the two methodologies had similar performance and can be used to describe binary and ternary Equilibrium.

  • nickel ii and zinc ii removal using amberlite ir 120 resin Ion Exchange Equilibrium and kinetics
    Chemical Engineering Journal, 2013
    Co-Authors: Pietro Escobar Franco, Rosângela Bergamasco, Carlos Eduardo Borba, Marcia Teresinha Veit, Gilberto Da Cunha Goncalves, Marcia Regina Fagundesklen, Edson Antonio Da Silva, Pedro Yahico Ramos Suzaki
    Abstract:

    Abstract In the present work, experimental data was obtained on Ion Exchange Equilibrium for the binary systems Ni 2+ /Na + and Zn 2+ /Na + and the ternary system Ni 2+ /Zn 2+ /Na + , as well as on the kinetics of Ion Exchange for the binary systems Ni 2+ /Na + and Zn 2+ /Na + , using Amberlite IR 120 resin in closed batch system at 25 °C and starting pH of 4.5. The model used to describe Equilibrium data was the law of mass actIon, considering both ideal and non-ideal behaviors to represent the experimental data. Bromley’s and Wilson’s models were used to describe non-ideality in the liquid phase and in the resin, respectively. The thermodynamic Equilibrium constant and Wilson’s parameters were obtained by fitting the model to experimental Equilibrium data of each binary system. The non-ideal law of mass actIon best described the Equilibrium for the binary systems. Based on these results, only the non-ideal law of mass actIon was used to predict the Equilibrium for the ternary system, with the parameters of the binary systems being used. There was good agreement between the predicted and experimental values of the resin phase compositIon. Two models were used to describe the experimental data on Ion Exchange kinetics. The first one considered that Ion Exchange reactIon was the limiting step of the overall mass transfer process, while the second one considered intraparticle diffusIon as the limiting step. The latter was found to best describe the experimental data on Ion Exchange kinetics for binary systems.

  • Ion Exchange Equilibrium PredictIon for the System Cu2+−Zn2+−Na+
    Journal of Chemical & Engineering Data, 2010
    Co-Authors: Carlos Eduardo Borba, Edson Antonio Da Silva, S. Spohr, G.h.f. Santos, Reginaldo Guirardello
    Abstract:

    In this work, Ion Exchange experimental data were obtained in batch operatIon for the binary systems Cu2+−Na+, Zn2+−Na+, and Zn2+−Cu2+ and for the ternary system Cu2+−Zn2+−Na+. The Ionic Exchanger employed was the catIonic resin Amberlite IR 120. The experimental data for the binary systems and the ternary system were obtained at total concentratIons of (1, 3, and 5) mEq·L−1. The total Exchange capacity of the Amberlite IR 120 resin was obtained by the column technique. All experiments were carried out at 25 °C. To model the Ion Exchange Equilibrium, the Mass ActIon Law was used. The model considered both ideal and nonideal behavior to represent the experimental data. The nonideality in the solutIon phase and in the resin phase was described by Bromley’s model and by Wilson’s model. Wilson’s model interactIon parameters and the thermodynamic Equilibrium constants were obtained from the experimental data for each binary system, from which ternary system Ion Exchange Equilibrium was predicted. On the basis ...

  • Ion Exchange Equilibrium predictIon for the system cu2 zn2 na
    Journal of Chemical & Engineering Data, 2010
    Co-Authors: Carlos Eduardo Borba, Edson Antonio Da Silva, S. Spohr, G.h.f. Santos, Reginaldo Guirardello
    Abstract:

    In this work, Ion Exchange experimental data were obtained in batch operatIon for the binary systems Cu2+−Na+, Zn2+−Na+, and Zn2+−Cu2+ and for the ternary system Cu2+−Zn2+−Na+. The Ionic Exchanger employed was the catIonic resin Amberlite IR 120. The experimental data for the binary systems and the ternary system were obtained at total concentratIons of (1, 3, and 5) mEq·L−1. The total Exchange capacity of the Amberlite IR 120 resin was obtained by the column technique. All experiments were carried out at 25 °C. To model the Ion Exchange Equilibrium, the Mass ActIon Law was used. The model considered both ideal and nonideal behavior to represent the experimental data. The nonideality in the solutIon phase and in the resin phase was described by Bromley’s model and by Wilson’s model. Wilson’s model interactIon parameters and the thermodynamic Equilibrium constants were obtained from the experimental data for each binary system, from which ternary system Ion Exchange Equilibrium was predicted. On the basis ...

E. I. Volodina - One of the best experts on this subject based on the ideXlab platform.

P. U. Singare - One of the best experts on this subject based on the ideXlab platform.

  • Study on Ion Exchange Equilibrium for some uni-univalent and uni-divalent reactIon systems using strongly basic anIon-Exchange resin Duolite A-113
    Russian Journal of Physical Chemistry A, 2009
    Co-Authors: R. S. Lokhande, P. U. Singare, M. H. Dole
    Abstract:

    The study on thermodynamics of Ion Exchange Equilibrium for uni-univalent Cl−/I−, Cl−/Br−, and uni-divalent Cl−/SO42−, Cl−/C2O42− reactIon systems was carried out using Ion-Exchange resin Duolite A-113. The Equilibrium constant K was calculated by taking into account the activity coefficient of Ions both in solutIon as well as in the resin phase. The K values calculated for uni-univalent and uni-divalent anIon Exchange reactIon systems were observed to increase with rise in temperature, indicating the endothermic Exchange reactIons having enthalpy values of 17.21, 36.60, 19.50, 18.43 kJ/mol respectively.

  • Ion Exchange Equilibrium study using strongly basic anIon Exchange resin IndIon-102
    Oriental journal of chemistry, 2009
    Co-Authors: P. U. Singare, R. S. Lokhande, M. B. Nadar
    Abstract:

    The thermodynamic study was carried to predict the selectivity behaviour of anIon Exchange resin IndIon-102 in chloride form for iodide and bromide Ions in solutIon. The Equilibrium constant K values for the Ion Exchange reactIons were calculated at different temperatures from which the enthalpy values were obtained. The Equilibrium constant K calculated for Cl – / I – and Cl / Br uni-univalent Ion Exchange reactIon systems were observed to decrease with rise in temperature indicating the endothermic Exchange reactIons having enthalpy values 3.86 and 6.36 kJ /mol respectively.

  • Ion Exchange Equilibrium Study using Strongly Acidic CatIon Exchange Resins IndIon-225
    international journal of chemical sciences, 2009
    Co-Authors: P. U. Singare, R. S. Lokh, V. Y. Pattebahadur
    Abstract:

    The study on thermodynamics of Ion Exchange Equilibrium for uni-univalent H+ / Na+, H+ / K+ reactIon systems were carried out using strongly acidic catIon Exchange resin IndIon-225. For both the uni-univalent Ion Exchange reactIon systems, the Equilibrium constant K’ were calculated by using Bonner et. al equatIon by taking into account the mole fractIon of Ions in the resin phase. The Equilibrium constant values calculated for uni-univalent catIon Exchange reactIon systems were observed to increase with rise in temperature, indicating the endothermic Exchange reactIons having enthalpy values of 27.4 and 13.2 kJ /mol, respectively. On the basis of enthalpy values, the preferential selectivity of Ion Exchange resins in H+ form for different univalent Ions in aqueous solutIon is predicted.

  • Ion Exchange Equilibrium STUDY USING STRONGLY ACIDIC CATIon Exchange RESINS DUOLITE ARC 9353
    2009
    Co-Authors: P. U. Singare, R. S. Lokhande, S. Y. Pimple
    Abstract:

    The study on thermodynamics of Ion Exchange Equilibrium for uni-univalent H+ / Na+, H+ / K+ reactIon systems were carried out using strongly acidic catIon Exchange resin Duolite ARC 9353. For both the uniunivalent Ion Exchange reactIon systems, the Equilibrium constant K’ were calculated by taking in to account the mole fractIon of Ions in the resin phase. The Equilibrium constant values calculated for uni-univalent catIon Exchange reactIon systems were observed to increase with rise in temperature. The enthalpy values calculated were 6.80 and 6.20 kJ/mol respectively indicating the endothermic Ion Exchange reactIons. On the basis of enthalpy values the preferential selectivity of Ion Exchange resins in H+ form for different

  • Ion Exchange Equilibrium STUDY USING STRONGLY BASIC ANIon Exchange RESIN TULSIon A-33
    2009
    Co-Authors: P. U. Singare, R. S. Lokhande, P. C. Vartak
    Abstract:

    The selectivity behaviour of Ion Exchange resin TulsIon A-33 for inorganic anIons like iodide and bromide Ions was predicted on the basis of thermodynamic data. The Equilibrium constant K for Cl /I and Cl /Br uni-univalent Ion Exchange reactIons was calculated by taking in to account the mole fractIon of Ions in the resin phase. The values of K were observed to decrease with rise in temperature indicating the exothermic Ion Exchange reactIons having enthalpy values -8.43 and -15.30 kJ/mol respectively. The higher K values for iodide Ion Exchange reactIon indicate more affinity of the resin for iodide Ions as compared to that for bromide Ions also in the solutIon.

Béchir Hamrouni - One of the best experts on this subject based on the ideXlab platform.

  • Effect of Ionic strength on the Ion Exchange Equilibrium between AMX membrane and electrolyte solutIons
    Water Quality Research Journal, 2015
    Co-Authors: Islem Louati, Ch. Hannachi, Akrem Chaabouni, Fatma Guesmi, Béchir Hamrouni
    Abstract:

    The effect of Ionic strength variatIon on the Ion Exchange Equilibrium between AMX anIon Exchange membrane and electrolyte solutIons containing the most dominant anIons on natural waters (Cl−, NO3−, and SO42−) was studied. All experiments were carried out at a constant temperature of 25 °C. Ion Exchange isotherms were established, at different Ionic strengths from 0.1 to 0.5 M, for the systems (Cl−/NO3−), (Cl−/SO42−) and (NO3−/SO42−). Obtained results showed that for I = 0.1 M the affinity order is SO42 −>NO3−>Cl−. For I = 0.2 M this order is NO3−>SO42−>Cl−. For 0.3 and 0.5 M the AMX membrane becomes more selective for chloride than for nitrate or sulfate. Selectivity coefficients KNO3−Cl−, K2Cl−SO42− and K2NO3−SO42−, thermodynamic constants, and separatIon factors were calculated and decreased with the increase of Ionic strength.

  • Temperature effect on Ion Exchange Equilibrium between CMX membrane and electrolytes solutIons
    Journal of Water Reuse and Desalination, 2015
    Co-Authors: Akrem Chaabouni, Ch. Hannachi, Fatma Guesmi, Islem Louati, Béchir Hamrouni
    Abstract:

    Ion Exchange Equilibrium for three systems involving monovalent and divalent Ions has been investigated over various temperatures (283, 298 and 313 K) using CMX catIonic Exchange membrane. All experiments were carried out at 0.1 mol/L. Ion Exchange isotherms for the binary systems (Na + /K + ), (Na + /Ca 2+ ) and (K + /Ca 2+ ) were established at temperatures ranging from 283 to 313 K. The obtained affinity order is: K + >Ca 2+ >Na + . Selectivity coefficients K K+ 2Na + , K 2Na + Ca 2+ and K Ca 2+ 2K + were determined and found to increase with rise in temperature. Thermodynamic Equilibrium constants K i ° j were calculated. Wilson and Debye–Huckel equatIons have been used to calculate activity coefficients in the membrane and solutIon, respectively. Standard free energy Δ G T °, standard enthalpy change Δ H T ° and standard entropy change Δ S T ° were calculated. The values of Δ H T ° were found to be 51.98 kJ/mol, 64.59 kJ/mol and 29.57 kJ/mol, respectively, for (Na + /K + ), (Na + /Ca 2+ ) and (K + /Ca 2+ ) binary systems, which indicate that the Ion Exchange process between the CMX membrane and the studied binary systems is an endothermic process. Δ S T ° is found to be positive, which means that the increased randomness appeared on the membrane-solutIon interface during the Ion Exchange reactIon. In additIon, the standard free enthalpy change Δ G T ° value for all systems is negative, which is an indicatIon that the Ion Exchange Equilibrium is spontaneous in standard conditIons.

  • Ion Exchange Equilibrium between DOWEX 1X8 Resin Modified by Polyethyleneimine and Electrolyte SolutIons
    Journal of Water Resource and Protection, 2013
    Co-Authors: Ch. Hannachi, Fatma Guesmi, Khaoula Missaoui, Hana Tounakti, Béchir Hamrouni
    Abstract:

    In order to improve the selectivity of anIon Exchange resin, the surface of gel type anIon Exchange resin was modified with polyethyleneimine (PEI). In the proposed work an attempt to the utilizatIon of commercial anIon Exchange resin modified by adsorptIon of polyethyleneimine was investigated. Many conditIons of modificatIon of anIon Exchange resin surface were studied. The influent parameters on the DOWEX 1X8 resin modificatIon were determined using a factorial experimental design. The Ion Exchange reactIons were studied for modified and unmodified resin and electrolyte solutIons containing Cl-，NO3-，SO42-. All experiments were performed at constant Ionic strength I = 0.3 mol·L-1 and constant temperature T = 298 K. Ionic Exchange isotherms were established for the binary systems:Cl-/NO3-，Cl-/SO42- and NO3-/SO42-. The obtained results show that nitrate Ion was more sorbed than chloride and sulfate. The order of preference for the anIons studied in this investigatIon is:NO3->Cl->SO42-. All the results given by this resin were compared with those obtained with the AMX anIon Exchange membrane. Selectivity coefficients and thermodynamic constants for the three binary systems and for the two resins were determined. The modified resin became more selective towards monovalent anIons.

  • effect of temperature on Ion Exchange Equilibrium between amx membrane and binary systems of cl no 3 and so2 4 Ions
    Desalination and Water Treatment, 2010
    Co-Authors: Fatma Guesmi, Ch. Hannachi, Béchir Hamrouni
    Abstract:

    The effect of the temperature variatIon on Ion Exchange Equilibrium between an anIon Exchange membrane and solutIons of electrolytes containing the most dominant anIons of natural waters (CI−, NO− 3 and SO2minus; 4) was studied. All experiments were carried out at 0.3 mol l−1. AMX membrane experimented in this work is a commercial product provided by TOKUYAMA SODA. Humidity percentage and Ion Exchange capacity were determined. Ionic Exchange isotherms for the binary systems (CI−/NO−)3,(CI−/SO2− 4) and (NO− 3 / SO2− 4) were established at different temperatures from 283 to 313 K. At 283 and 298 K, the affinity order was: CI− > NO− 3 > SO2− 4. This order was NO− 3 > CI− > SO2− 4 at 313 K. Selectivity coefficients Kj i and thermodynamic Equilibrium constants K0j i calculated for uni-univalent and uni-bivalent Ions Exchange reactIon system increase with increasing temperature. Thermodynamic parameters such as standard free enthalpy change, standard enthalpy change, and standard entropy change were calculated....

  • Effect of temperature on Ion Exchange Equilibrium between AMX membrane and binary systems of Cl−, NO− 3 and SO2− 4 Ions
    Desalination and Water Treatment, 2010
    Co-Authors: Fatma Guesmi, Ch. Hannachi, Béchir Hamrouni
    Abstract:

    The effect of the temperature variatIon on Ion Exchange Equilibrium between an anIon Exchange membrane and solutIons of electrolytes containing the most dominant anIons of natural waters (CI−, NO− 3 and SO2minus; 4) was studied. All experiments were carried out at 0.3 mol l−1. AMX membrane experimented in this work is a commercial product provided by TOKUYAMA SODA. Humidity percentage and Ion Exchange capacity were determined. Ionic Exchange isotherms for the binary systems (CI−/NO−)3,(CI−/SO2− 4) and (NO− 3 / SO2− 4) were established at different temperatures from 283 to 313 K. At 283 and 298 K, the affinity order was: CI− > NO− 3 > SO2− 4. This order was NO− 3 > CI− > SO2− 4 at 313 K. Selectivity coefficients Kj i and thermodynamic Equilibrium constants K0j i calculated for uni-univalent and uni-bivalent Ions Exchange reactIon system increase with increasing temperature. Thermodynamic parameters such as standard free enthalpy change, standard enthalpy change, and standard entropy change were calculated....

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