Evaluation of the capacity of Ivory Coast clay to depollute water contaminated by Hg, Pb, Cd and As
Evaluation de la capacité de l'argile de Côte d'Ivoire à dépolluer les eaux contaminées par Hg, Pb, Cd et As
Résumé
Anthropogenic activities in general and mining in particular, are at the root of the pollution of water resources by metals and metalloids in the Ivory Coast. These pollutants have harmful effects on the health of the population and therefore must be eliminated from the impacted water before consumption. Based on its mineralogical composition and physico-chemical properties, this study aimed to assess the capacity of Katiola clay (Côte d’Ivoire) to remove metals (Hg, Pb, Cd) and arsenic in aqueous solutions. Adsorption was used to remove the chemical species. Different parameters that can influence the adsorption were studied (mass, pH, contact time and initial concentration). Relative to monometallic adsorption, the removal of chemical species decreased as follows: Pb
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