CALCIUM AS POTENTIAL DETERMINING ION IN AQUEOUS CALCITE SUSPENSIONS

被引：108

作者：

PIERRE, A ^{[1
]}

LAMARCHE, JM ^{[1
]}

MERCIER, R ^{[1
]}

FOISSY, A ^{[1
]}

PERSELLO, J ^{[1
]}

机构：

[1] CTR RECH RHONE POULENC,F-69150 DECINES CHARPIEU,FRANCE

来源：

JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY | 1990年 / 11卷 / 06期

关键词：

CALCITE; ELECTROKINETIC POTENTIAL; COMPLEXATION MODEL; CALCIUM AS A DETERMINING ION;

D O I：

10.1080/01932699008943286

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：

Electrokinetic mobility was measured on calcite particles dispersed in aqueous solutions as a function of pH, ion concentration and type (Na+, Ca2+, Cl-, SO4(2-). Whatever the pH value, experimental results show a good correlation between electrokinetic potential and Ca2+ activity. Considering Ca2+ as a potential determining ion and using a simple complexation model at the surface, we show that the displacement of the isoelectric point can be attributed to the relative affinity of CO3(2-) and Ca-2+ for the surface.

引用

页码：611 / 635

页数：25

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