Determining the zeta potential of ultrafiltration membranes using their salt retention

被引：20

作者：

Huisman, IH ^{[1
]}

Trägårdh, G ^{[1
]}

机构：

[1] Univ Lund, S-22100 Lund, Sweden

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1999年 / 157卷 / 1-3期

关键词：

zeta potential; porous membranes; salt retention; electrokinetic phenomena;

D O I：

10.1016/S0927-7757(99)00090-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A theory was developed that relates the salt retention of porous membranes to the membrane zeta potential. This theory predicts that the salt retention of charged ultrafiltration and microfiltration membranes may differ from zero, because of the existence of a double layer of ions near the charged pore surfaces. Calculated values of salt retention were found to increase with decreasing ionic strength (i.e. increasing double layer thickness) and with increasing zeta potential. Based on this theory, the zeta potential of cellulose acetate and ceramic ultrafiltration membranes were calculated from experimentally obtained salt retention values. Realistic values of zeta potential were obtained. (C) 1999 Elsevier Science B.V. All rights reserved.

引用

页码：261 / 268

页数：8

共 19 条

[1] PROPERTIES OF MICROFILTRATION MEMBRANES - COMPUTER AUTOMATED-DETERMINATION OF THE ELECTROKINETIC PROPERTIES OF POLYCARBONATE MEMBRANES [J].