Influence of complexation on lead(II) and cadmium(II) percolation through a clay liner |
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Authors: | Frédérique Barbier Gérard Duc Jean-louis Imbert Michelle Petit-ramel |
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Institution: | 1. Université Claude Bernard Lyon 1, Laboratoire d'Instrumentation et de Chimie Analytique en Solution – LICAS , 43 boulevard du 11 novembre 1918, F – 69622, Villeurbanne, France;2. Service Central d'Analyse du CNRS , Echangeur de Solaize, BP 22, F – 69390, Vernaison, France frederique.barbier@free.fr;4. Université Claude Bernard Lyon 1, Laboratoire d'Instrumentation et de Chimie Analytique en Solution – LICAS , 43 boulevard du 11 novembre 1918, F – 69622, Villeurbanne, France;5. Service Central d'Analyse du CNRS , Echangeur de Solaize, BP 22, F – 69390, Vernaison, France |
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Abstract: | Wastes are usually stocked in waste disposals without any pre-treatment. Runoff waters lead to the formation of leachates containing mineral and organic pollutants. In order to prevent groundwater contamination, a double barrier is placed on the landfill bottom. The first one is an active barrier made up of a draining system and a geomembrane, and the second one, consisting of a clay liner allowing pollutant retention, is considered as a passive system. The aim of this work is to evaluate the complexation impact on the organic and inorganic retention. Percolations on columns filled with clay are performed, which allow a better knowledge of the transfer of metallic pollutants, complexed or not, through a model porous media, considering charge and conditional stability of complexes. |
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Keywords: | Cadmium(II) Clay Complexation Lead(II) Percolation column |
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