Abstract

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.

中文翻译：

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使用膜电导率数据估算离子交换平衡常数

摘要

对于离子交换膜 - 溶液系统，研究了根据膜在单独和混合溶液中的特定电导率的浓度依赖性来计算膜的离子组成和离子交换平衡常数的可能性，在其中溶液包含两种类型的反离子和一个普通的离子。已对 MF-4SK 和 MK-40 膜在氯化钙和氯化钠的混合溶液中进行了计算，结果表明所得值与文献报道的值具有令人满意的一致性。这种方法已用于估计聚苯胺改性的 MF-4SK 和 MK-40 膜的离子交换平衡常数，