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Flocculation of Na-montmorillonite by electrolytes

Published online by Cambridge University Press:  09 July 2018

E. A. Ferreiro  and
A. K. Helmy
E. A. Ferreiro
Affiliation:
Instituto de Edafologia e Hidrologia, Universidad Nacional del Sur, Bahia Blanca, Argentina
A. K. Helmy
Affiliation:
Instituto de Edafologia e Hidrologia, Universidad Nacional del Sur, Bahia Blanca, Argentina
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Abstract

The flocculation of a Na-montmorillonite suspension by Na, Ca, and Al chlorides was investigated using the optical absorbance method. The flocculation of the clay was found to be irreversible with a degree of irreversibility that increases with electrolyte concentration. The flocculation values of Na, Ca and Al chlorides were found to be equal to 8, 0·25 and 0·032 mmol/l respectively. The ratio of the flocculation values of the different salts is in reasonable agreement with the ratio predicted by current theories of colloid stability.

Information

Type
Research Article
Information
Clay Minerals , Volume 10 , Issue 3 , July 1974 , pp. 203 - 213
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1974

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