Na+-Ca2(+) exchange effects in the detachment of latex colloids deposited in glass bead porous media

被引：23

作者：

Roy, SB ^{[1
]}

Dzombak, DA ^{[1
]}

机构：

[1] CARNEGIE MELLON UNIV,DEPT CIVIL & ENVIRONM ENGN,PITTSBURGH,PA 15213

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1996年 / 119卷 / 2-3期

基金：

美国国家科学基金会;

关键词：

latex colloids; glass bead porous media; ion exchange;

D O I：

10.1016/S0927-7757(96)03764-8

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：

The detachment of latex colloids deposited in packed glass-bead columns was observed under conditions where the ionic strength was reduced and ion exchange between Na+ and Ca2+ occurred. For identical influent solutions producing colloid release, it was found that deposited colloids in equilibrium with Ca2+ were released less readily than those in equilibrium with Na+. For influent solutions at the same reduced ionic strength with Ca2+ or Na+, colloid release was lower when Ca2+ ions were present. These phenomena cbn be explained by the selectivity of latex surfaces for Ca2+ over Na+ ions as observed in Na+-Ca2+ exchange experiments.

引用

页码：133 / 139

页数：7

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