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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.

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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