Electrokinetic study of kaolinite suspensions

被引：65

作者：

Chassagne, C. ^{[1
]}

Mietta, F. ^{[1
]}

Winterwerp, J. C. ^{[1
,2
]}

机构：

[1] Delft Univ Technol, Fac Civil Engn & Geosci, Dept Environm Fluid Mech, NL-2600 GA Delft, Netherlands

[2] Deltares, NL-2600 MH Delft, Netherlands

来源：

JOURNAL OF COLLOID AND INTERFACE SCIENCE | 2009年 / 336卷 / 01期

关键词：

Zeta potential; Kaolinite; Clay; Debye length; Electrokinetics; Electrophoresis; Dielectric spectroscopy; DIELECTRIC-SPECTROSCOPY MEASUREMENTS; DYNAMIC MOBILITY; SURFACE-CHARGE; ELECTROPHORESIS; PARTICLE;

D O I：

10.1016/j.jcis.2009.02.052

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：

In this article a new formula for the electrophoretic mobility of a spheroidal colloid is given. This formula and the formula presented in Chassagne and Bedeaux [C. Chassagne, D. Bedeaux, J. Colloid Interface Sci. 326 (2008) 240-253] for the dipolar coefficient of a spheroidal colloid are intertwined. The combination of electrophoresis and complex conductivity measurements (from which the dipolar coefficient can be derived) allows to assess both the zeta potential and the Stern layer conductance. We will in particular show that the values found for the zeta potential from both techniques are similar in the case of the kaolinite suspension studied. Electrophoretic mobility data are also presented and discussed for a wide range of ionic strengths, different types of salt and various pH. This data has been used in flocculation studies on the same kaolinite samples [F. Mietta, C. Chassagne, J.C. Winterwerp, J. Colloid Interface Sci., accepted for publication, doi:10.1016/j.wjcis.2009.03.044]. (C) 2009 Elsevier Inc. All rights reserved.

引用

页码：352 / 359

页数：8

共 24 条

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