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Reliability of illite as a liner material under chemical environment

Lakshmikantha, H and Sivapullaiah, PV (2003) Reliability of illite as a liner material under chemical environment. In: Clay Research, 22 (1-2). pp. 1-12.

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Landfills are increasingly used to dispose of all types of waste. Leachate generated by precipitation and other liquids within the refuse is free to flow from unlined landfills into surface water and groundwater, potentially polluting drinking water aquifers. Even though clay liners have many limitations, they are still used since they are natural, relatively inert, and generally available; moreover, they are inexpensive, have large attenuation capacity, and resist damage and puncture. A major problem with clay liners is that chem. wastes or leachate may destroy them. This work analyzed illite properties in relation to its use as liner material. The effect of 0.5 normal HCl, NaCl, and NaOH solutions, water, and CCl4 on geotechnical properties of illite was assessed. Results showed illite marginally meets the requirements of liner material; hence, illite alone is not suitable for liner application. The susceptibility of illite liners from changes in effective stress and physicochemistry environments is low. Its sp. surface area and cation exchange capacity are low, making it less desirable for liner application.

Item Type: Journal Article
Publication: Clay Research
Publisher: Clay Minerals Society of India
Additional Information: The Copyright belongs to Clay Minerals Society of India.
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Date Deposited: 25 Apr 2006
Last Modified: 27 Aug 2008 11:55
URI: http://eprints.iisc.ac.in/id/eprint/6424

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