ChemInform Abstract: Equilibrium Data for the Exchange of Cu2+, Cd2+, and Zn2+ Ions for H+ on the Cationic Exchanger Amberlite IR‐120.

Valverde, J.L.; Lucas, Antonio de; González, Marcela; Rodrı́guez, Juan F.

doi:10.1002/chin.200229024

Cited by 6 publications

(12 citation statements)

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“…Several studies ,,,, have shown that the mass action law is efficient to represent equilibrium in ion exchange for different systems. However, the mass action law was used in some studies to represent the equilibrium in the dynamics of the fixed-bed column only. ,, Nevertheless, these works considered an ideal behavior that means that all sites are available to the exchanging process.…”

Section: Resultsmentioning

confidence: 99%

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Mass Transfer Mechanism of Ion Exchange in Fixed Bed Columns

Ostroski¹,

Borba²,

Silva³

et al. 2011

J. Chem. Eng. Data

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In this work, the binary ion exchange of Zn2+−Na+ ions has been studied by a column technique using a NaY zeolite as the cation exchanger. The experimental data (breakthrough curves) for the binary system were obtained at total concentrations of (1, 2, and 3) meq·L−1. The mass action law was used to represent the ion exchange equilibrium. To represent the ion exchange in the column, two models were used. In the first model, the rate-controlling step of mass transfer was considered only in the solid phase. The experimental results were represented by a Linear Driving Force (LDF) model. In the second model, resistance to mass transfer in series in the solid phase and the external liquid film was considered. Both models described ion exchange in the fixed-bed column properly. However, in the initial part of the breakthrough curve, the dual resistance model fit better.

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Section: Resultsmentioning

confidence: 99%

“…Several researchers − have successfully used the Wilson model to calculate the activity coefficients of ionic species in the solid phase.…”

Section: Mathematical Modelingmentioning

confidence: 99%

Mass Transfer Mechanism of Ion Exchange in Fixed Bed Columns

Ostroski¹,

Borba²,

Silva³

et al. 2011

J. Chem. Eng. Data

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“…Semitheoretically approaches to investigate the role of temperature on ion exchange equilibria have been investigated by a number of researchers. − Barri et al investigated the binary and ternary cation exchange in zeolites involving Na + , Ca 2+ and Mg 2+ at 25 and 65 °C. They fitted the corrected selectivity coefficient ( K c ) data to polynomial equations and then from these equations, thermodynamic parameters were calculated.…”

Section: Introductionmentioning

confidence: 99%

Temperature-Dependent Model for the Prediction of Binary Ion Exchange Equilibria Involving Na⁺, K⁺, Ca²⁺ and Mg²⁺ Ions

Rustam

Shallcross

2014

Ind. Eng. Chem. Res.

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The effect of temperature on the ion exchange equilibrium behavior of binary systems is studied experimentally and modeled. The study considers the exchange between binary systems involving Na+, K+, Ca2+ and Mg2+ ions with Cl– as a nonexchanging anion on Rohm and Hass gel-type Amberjet 1200H resin as the ion exchange medium. Experimental equilibrium data is obtained for the six constitutive binary systems at 4.0, 25.0 and 60.0 °C with a total solution concentration of 0.10 N. The nonidealities in the solution and exchanger phases are modeled by applying the Pitzer and Wilson models, respectively. Thermodynamic equilibrium constant and Wilson interaction parameters are modeled with respect to temperature. The model proposed allows the influence of temperature on the ion exchange equilibrium behavior to be predicted well.

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“…They agreed that Wilson’s model was slightly better. Several investigators − ,− have successfully used Wilson’s model to calculate the activity coefficient of the species in the resin phase.…”

Section: Introductionmentioning

confidence: 99%

“…Shallcross et al were among the first to use this model to calculate the activity coefficients of ions in solution to represent the equilibrium of ionic exchange processes by the Mass Action Law. Later, Pitzer’s model was used by several authors ,,,, to calculate the activity coefficients in the solution phase.…”

Section: Introductionmentioning

confidence: 99%

Ion Exchange Equilibrium Prediction for the System Cu²⁺−Zn²⁺−Na⁺

et al. 2010

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In this work, ion exchange experimental data were obtained in batch operation for the binary systems Cu 2+ -Na + , Zn 2+ -Na + , and Zn 2+ -Cu 2+ and for the ternary system Cu 2+ -Zn 2+ -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 of the results obtained to represent the ion exchange equilibrium for the binary systems, a prediction was made using only the nonideal Mass Action Law. Good agreement was obtained between the calculated and measured values of the resin phase composition.

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ChemInform Abstract: Equilibrium Data for the Exchange of Cu²⁺, Cd²⁺, and Zn²⁺ Ions for H⁺ on the Cationic Exchanger Amberlite IR‐120.

Cited by 6 publications

References 1 publication

Mass Transfer Mechanism of Ion Exchange in Fixed Bed Columns

Mass Transfer Mechanism of Ion Exchange in Fixed Bed Columns

Temperature-Dependent Model for the Prediction of Binary Ion Exchange Equilibria Involving Na⁺, K⁺, Ca²⁺ and Mg²⁺ Ions

Ion Exchange Equilibrium Prediction for the System Cu²⁺−Zn²⁺−Na⁺

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ChemInform Abstract: Equilibrium Data for the Exchange of Cu2+, Cd2+, and Zn2+ Ions for H+ on the Cationic Exchanger Amberlite IR‐120.

Cited by 6 publications

References 1 publication

Mass Transfer Mechanism of Ion Exchange in Fixed Bed Columns

Mass Transfer Mechanism of Ion Exchange in Fixed Bed Columns

Temperature-Dependent Model for the Prediction of Binary Ion Exchange Equilibria Involving Na+, K+, Ca2+ and Mg2+ Ions

Ion Exchange Equilibrium Prediction for the System Cu2+−Zn2+−Na+

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Product

Resources

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ChemInform Abstract: Equilibrium Data for the Exchange of Cu²⁺, Cd²⁺, and Zn²⁺ Ions for H⁺ on the Cationic Exchanger Amberlite IR‐120.

Temperature-Dependent Model for the Prediction of Binary Ion Exchange Equilibria Involving Na⁺, K⁺, Ca²⁺ and Mg²⁺ Ions

Ion Exchange Equilibrium Prediction for the System Cu²⁺−Zn²⁺−Na⁺