2021 年 2 巻 p. 37-38
In this study, cation exchange membranes （CEMs） were prepared using sulfonated polyether sulfone （SPES）, and the characteristics of the membrane were then evaluated. Donnan dialysis experiments with the CEM were performed using NaCl as the driving solution of uphill transport of Ca2＋ ions. The prepared CEM had almost the same ionic transport properties as that of a commercial CEM. The Donnan dialysis showed that the Ca2＋ ion concentration on the feed solution side decreased while Na＋ ions concentration increased, indicating that Donnan dialysis has a potential application for separation processes such as water softening.
