REMOVAL OF Cd2+, Cu2+AND Pb2+ WITH A BURKINA FASO CLAY </br> ELIMINATION DU Cd2+, DU Cu2+ ET DU Pb2+ PAR UNE ARGILE LOCALE DU BURKINA FASO

BRAHIMA SORGHO(1*), ABDOULKADRI AYOUBA MAHAMANE(2), BOUBIE GUEL(2), LAMINE ZERBO(1), MOUSSA GOMINA(3), PHILIPPE BLANCHART(4)

1. Université Ouaga I Pr. KI-ZERBO, Equipe Physico-Chimie et de Technologie des Matériaux, 03 BP 7021 Ouagadougou 03, Burkina Faso
2. Université Ouaga I Pr. KI-ZERBO, Equipe Chimie Physique et Electrochimie, 03 BP 7021 Ouagadougou 03, Burkina Faso
3. Ecole Nationale Supérieure d’Ingénieurs de Caen (ENSICAEN), Laboratoire de Cristallographie et Sciences des Matériaux (CRISMAT), 6, Bd. Maréchal Juin, 14050 Caen, France
4. Ecole Nationale Supérieure de Céramique Industrielle (ENSCI), Laboratoire Science des Procédés Céramiques et Traitements de Surface (SPCTS), 12, Rue Atlantis, 87068 Limoges, France
*Corresponding author: sobrah20@yahoo.fr

Abstract

Contamination of water by heavy metals is often linked to human, industrial and agricultural activities, and cause health and ecological problems. The objective of this study is to remove water pollutants like Cd2+, Cu2+ and Pb2+ in synthetic solutions by adsorption on clay from Burkina Faso. Electrochemical characterizations revealed that 90 % of heavy metals can be removed. Structural studies evidenced that almost all clay mineral species participate to the removal of heavy metals through different physico-chemical mechanisms namely ion exchange, complexation and precipitation.

Keywords

Burkina Faso clay heavy metals mechanisms pollution
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