Estimation of Ion-Exchange Equilibrium Constant Using Membrane Conductivity Data
The possibility of calculating the ionic composition of a membrane and the ion-exchange equilibrium constant on the basis of the concentration dependences of the specific conductivity of the membrane in individual and mixed solutions has been studied for an ion-exchange membrane–solution system, in...
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Veröffentlicht in: | Colloid journal of the Russian Academy of Sciences 2021-05, Vol.83 (3), p.379-386 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The possibility of calculating the ionic composition of a membrane and the ion-exchange equilibrium constant on the basis of the concentration dependences of the specific conductivity of the membrane in individual and mixed solutions has been studied for an ion-exchange membrane–solution system, in which the solution contains two types of counterions and a common coion. The calculation has been carried out for MF-4SK and MK-40 membranes in a mixed solution of calcium and sodium chlorides, and a satisfactory agreement of the obtained values with those reported in the literature has been shown. This approach has been used to estimate the ion-exchange equilibrium constant for polyaniline-modified MF-4SK and MK-40 membranes, and a correlation has been shown between the results of the conductivity studies and the assessments of the counterion fluxes during the electrodialysis of the mixed solutions. |
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ISSN: | 1061-933X 1608-3067 |
DOI: | 10.1134/S1061933X21030054 |