SURFACE COMPLEXATION OF CALCIUM MINERALS IN AQUEOUS-SOLUTION .3. ION-EXCHANGE AND ACID-BASE PROPERTIES OF HYDROUS FLUORITE SURFACES

被引：27

作者：

WU, LM ^{[1
]}

FORSLING, W ^{[1
]}

机构：

[1] LULEA UNIV TECHNOL,DEPT INORGAN CHEM,S-97187 LULEA,SWEDEN

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 1995年 / 174卷 / 01期

关键词：

D O I：

10.1006/jcis.1995.1380

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 acid-base properties of hydrous fluorite surfaces and ion exchange reactions between surface lattice ions of F- and OH- ions in bulk solution have been investigated. The measurements were performed as potentiometric titrations with varied solid concentrations in 0.1 mol dm(-3) KCI medium at 25.0 degrees C using a glass electrode for -log H+ and a fluoride ion selective electrode for -log F- . The experimental data could be explained by a model that assumes the surface equilibria GRAPHICS log beta(-210-1)(S)(int)= -20.3 +/- 0.1 The equilibrium constants were evaluated using the computer program FITEQL assuming a constant capacitance model for the electric double layer. (C) 1995 Academic Press, Inc.

引用

页码：178 / 184

页数：7

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