Abstract

The processes of ion transport are studied using the model of a single ion-exchanger particle. The MA-40 anion-exchange membrane is chosen as a model. The fundamental difference between the membrane model of the ion exchanger and the ion exchanger itself is that the electric potential inside the solid phase can be measured on the membrane due to a special design of the measuring device. This measurement is impossible in the ion exchanger itself. Due to the indicated feature of the chosen membrane model, it became possible to propose a simple mathematical model of the process for analyzing the potential dynamics graphs. The time-varying potentials are measured on both sides of the membrane using the AgCl/Ag reference electrodes. The dynamics of time changes in the potentials of the membrane surfaces is recorded. The time change in the membrane potentials reflects the process of establishing the ion-exchange equilibrium at the membrane-solution interface. The mechanism of transfer processes across the interphase boundary is discussed.

中文翻译：

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离子交换器中的非稳态电化学过程

摘要

使用单个离子交换剂粒子模型研究离子传输过程。选择 MA-40 阴离子交换膜作为模型。离子交换器的膜模型与离子交换器本身的根本区别在于，由于测量装置的特殊设计，可以在膜上测量固相内部的电位。这种测量在离子交换器本身中是不可能的。由于所选膜模型的指示特征，因此可以提出用于分析潜在动力学图的过程的简单数学模型。使用 AgCl/Ag 参考电极在膜的两侧测量随时间变化的电位。记录膜表面电位的时间变化动态。膜电位的时间变化反映了在膜-溶液界面建立离子交换平衡的过程。讨论了跨相边界的传递过程的机制。