Estuary bays of Ebrié lagoon have one of the most alarming question pollution caused by the strong human pressure in Abidjan townships where they move around. The levels of metals (Ni, Cu, Zn and Cd) in surface sediments collected during the dry and rainy seasons (February and August 2014) have been determined. Moreover, we found out that concentrations in metals of the sediments are higher than those of the continental crust (UCC), which confirms pollution. From the most to the less concentration of metals, we have Zn> Cu> nor> CD. These concentrations increase from the dry to the rainy season. On the other hand, the determination of metal geo-accumulation indices (Igeo) has showed that pollution by metals is more in rainy season than in the dry one. About metals the most polluting to the less, we have Cd> Cu Zn>> nor. Selon Müller classification (1981), the sediments studied, progress unpolluted (Class 1) TB very severely polluted (class 6). Furthermore, the concentrations of Ni, Cu, Zn and Cd in the sediments have increased significantly from 2005 to 2014.
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Author Name: Aka. A. Maurice *, Wognin has Valérie, Irie Bi. T.J.G, Coulibaly A. Sougo, World S, and AKA Kouamé
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Keywords: pollution, metals, estuarine bays, seasons, Côte d'Ivoire.
ISSN:
EISSN: 2249 –1929
EOI/DOI: nill
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