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Effect of phosphate adsorption on the permeability of clays

Sivapullaiah, PV and Sridharan, A and Rao, AS (1996) Effect of phosphate adsorption on the permeability of clays. In: 2nd International Congress on Environmental Geotechnics, NOV 05-08, 1996, OSAKA, JAPAN.

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Abstract

In this paper, the effect of phosphate anion adsorption on the permeability values of homoionized kaolinite and montmorillonite clays is presented. The homoionized sodium, calcium and hydrogen clays are prepared by repeatedly washing the clays with 2N solutions of corresponding chlorides. Phosphate adsorption was induced by treating homoionized clays with phosphoric acids for different periods varying upto 1000 hrs. The coefficient of permeability of the clays was determined from one dimensional consolidation test results. The decrease in the permeability of kaolinite clays on phosphate adsorption has been explained on the fabric changes. For montmorillonite, both cation exchange and phosphate adsorption causes significant changes which are explained based on variation in the thickness of diffuse double layer.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to A A Balkema.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 28 Apr 2011 05:52
Last Modified: 28 Apr 2011 05:52
URI: http://eprints.iisc.ernet.in/id/eprint/37132

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