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A Pollutant transport investigated through an expansive clay

Abstract : In the framework of domestic waste disposals, the in-situ compaction of soil is usually used to obtain engineered clay barriers with suitable confining properties. Permeability and pollutant retention are the major properties which should be investigated in this context for barrier evaluation. Considering clay barriers in contact with waste leachates, they may be saturated by solutes of various chemical compositions, including in particular toxic heavy metals. In this context, the expansive Fo-Ca clay, a natural Ca-smectite from the Paris basin of Ypersian (Sparnacian) age, was chosen because of its very low permeability and ability for pollutant retention through cationic exchanges. The smectic is associated with kaolinite (up to 20%), and minor quartz, calcite, goethite and gypsum.
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Submitted on : Wednesday, August 30, 2006 - 9:31:05 AM
Last modification on : Thursday, January 27, 2022 - 4:22:02 PM
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  • HAL Id : hal-00090323, version 1



Chantal Proust, Lydie Le Forestier. A Pollutant transport investigated through an expansive clay. 2nd Mid-European Clay Conference, 2004, Miskolc, Hungary. ⟨hal-00090323⟩



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