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高岭石悬浮液的动电研究

Electrokinetic study of kaolinite suspensions.

作者信息

Chassagne C, Mietta F, Winterwerp J C

机构信息

Department of Environmental Fluid Mechanics, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Box 5048, 2600 GA Delft, The Netherlands.

出版信息

J Colloid Interface Sci. 2009 Aug 1;336(1):352-9. doi: 10.1016/j.jcis.2009.02.052. Epub 2009 Apr 8.

Abstract

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.jcis.2009.03.044].

摘要

本文给出了球形胶体电泳迁移率的一个新公式。该公式与Chassagne和Bedeaux [C. Chassagne, D. Bedeaux, J. Colloid Interface Sci. 326 (2008) 240 - 253] 提出的球形胶体偶极系数公式相互关联。电泳和复电导率测量(可从中导出偶极系数)相结合,能够评估zeta电位和斯特恩层电导率。我们将特别表明,在所研究的高岭土悬浮液的情况下,通过这两种技术得到的zeta电位值是相似的。还给出并讨论了在广泛的离子强度、不同类型的盐和各种pH值下的电泳迁移率数据。这些数据已用于对相同高岭土样品的絮凝研究 [F. Mietta, C. Chassagne, J.C. Winterwerp, J. Colloid Interface Sci., 已接受发表,doi:10.1016/j.jcis.2009.03.044]。

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