A RELATION BETWEEN THE AMOUNTS OF SORBED ALKALI CATIONS AND THE STABILITY OF COLLOIDAL SILICA

被引：36

作者：

MILONJIC, SK

机构：

来源：

COLLOIDS AND SURFACES | 1992年 / 63卷 / 1-2期

关键词：

ALKALI CATIONS; COLLOIDAL SILICA; SORPTION; STABILITY;

D O I：

10.1016/0166-6622(92)80077-F

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 sorption of alkali cations, at various pH values and concentrations (0.1-4.0 mol dm-3), on colloidal silica was investigated by the potentiometric titration method. At the same time the colloidal silica stability in the presence of these cations was determined. The critical coagulation concentration of alkali cations decreases with increasing pH and for all studied cations a common "critical sorption curve" was obtained. The amount of sorbed cations at the critical coagulation concentration was found to correspond to a maximum value of the sorption at a given pH. Therefore, the coagulation of colloidal silica in the presence of alkali cations will occur with the sorption of the maximum possible amount of these ions at given pH values.

引用

页码：113 / 119

页数：7

共 32 条

[1] THE ION EXCHANGE PROPERTIES OF SILICA GEL .1. THE SORPTION OF NA+, CA2+, BA2+, UO2(2)+, GD3+, ZR(IV) + NB, U(IV) AND PU(IV) [J].