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Simulation of 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 : Thursday, August 10, 2006 - 4:28:36 PM
Last modification on : Friday, April 5, 2019 - 8:08:24 PM
Long-term archiving on: : Tuesday, April 6, 2010 - 12:34:25 AM

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  • HAL Id : hal-00089155, version 1

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Chantal Proust, Roger Lédée, Agnès Jullien, Lydie Le Forestier. Simulation of pollutant transport investigated through an expansive clay.. Bridging Clays : Joint meeting of the Clay Minerals Society and the French Clay Group"- 43rd Annual Meeting of the CMS - 4ème Colloque du GFA, 2006, Oléron, France. ⟨hal-00089155⟩

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