Modification of cation-exchange membrane properties by electro-adsorption of polyethyleneimine

被引：75

作者：

Amara, M ^{[1
]}

Kerdjoudj, H ^{[1
]}

机构：

[1] USTHB, IC, Fac Chim, Lab Hydromet & Chim Inorgan Mol, El Alia, Alger, Algeria

来源：

DESALINATION | 2003年 / 155卷 / 01期

关键词：

electro-adsorption; polyethyleneimine; selectivity; membrane;

D O I：

10.1016/S0011-9164(03)00241-8

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A cation-exchange membrane has been modified by fixation of polyethyleneimine on its surface. This fixation was carried out under an electric field effect, thus it is called electro-adsorption. The polycation formed in an acidic medium migrated toward the membrane and a charged layer was deposited on the surface, and the selectivity towards divalent ions decreased, yielding to the increase of the proton transfer. When the amount of adsorbed PEI increased, the electrical resistance of the membrane increased and the transport number of zinc decreased. However, suitable conditions like pH, current density and electro-adsorption time were controlled in the order to obtain membranes with better selectivity and low electrical resistance.

引用

页码：79 / 87

页数：9

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