Anomalous aggregation behaviour of aluminium oxyhydroxides

被引：25

作者：

Beattie, JK ^{[1
]}

Cleaver, JK ^{[1
]}

Waite, TD ^{[1
]}

机构：

[1] UNIV NEW S WALES,DEPT WATER ENGN,SYDNEY,NSW 2052,AUSTRALIA

来源：

COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS | 1996年 / 111卷 / 1-2期

关键词：

aggregation; alumina suspensions; aluminium oxyhydroxides; DLVO model; light scattering; photon correlation spectroscopy;

D O I：

10.1016/0927-7757(95)03493-5

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 aggregation of alumina suspensions (gamma-alumina, boehmite and gibbsite) has been observed by light scattering as a function of the identity and concentration of added electrolyte, and of acidic pH. All the suspensions aggregated rapidly in the presence of less than 1 mM sulfate ion. The gibbsite suspension displayed a critical coagulation concentration of less than 50 mM chloride ion. The other three suspensions displayed anomalous stability in chloride solutions of concentrations greater than 0.1 M and only aggregated at higher chloride ion concentrations. This stability is not related to the pH and electrolyte dependence of the zeta potential.

引用

页码：131 / 138

页数：8

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