期刊
JOURNAL OF MEMBRANE SCIENCE
卷 167, 期 1, 页码 1-31出版社
ELSEVIER
DOI: 10.1016/S0376-7388(99)00277-X
关键词
anion exchange membranes; transport number between anions in electrodialysis; hydration of anions and hydrophilicity of the; membranes; thermally responsive anion exchange membranes; nitrate ion permselective anion exchange membranes
Recent studies on anion exchange membranes and electrodialysis methods to permeate specific anions through the membranes are reviewed. The studies are classified: (1) to increase cross-linkage of the anion exchange membranes, (2) to form eight surface layers on the anion exchange membranes, (3) to decrease hydrophilicity of the anion exchange membranes or their surfaces by introducing specific anion exchange groups in the membranes, (4) to impregnate hydrophilic compounds in the anion exchange membranes to increase hydrophilicity of the membranes, (5) to control permselectivity of anions by photoirradiation using membranes with a photoresponsive group and (6) to control permselectivity of anions through thermally responsive anion exchange membranes with temperature. Permselectivity of specific anions through the anion exchange membranes is governed mainly by the balance of hydration energy of anions with hydrophilicity of the membranes, partially by hydrated ionic size of the anions, except the membranes having an oppositely charged layer on the membrane surface. (C) 2000 Elsevier Science B.V. All rights reserved.
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