STUDY OF CONTAMINATION BY METALLIC ELEMENTS IN COASTAL SEDIMENTS: CASE OF THE COTONOU CHANNEL

Coastal aquatic ecosystems are environments increasingly affected by human activities due to urban discharges and their use as dumps. The objective of this study is determine the profiles metallic elements concentration (Al, Cr, Mn, Fe, Co, Ni, Cu, Zn, As, Cd, Pb) Cotonou channel sediments evaluate quality. For this, surface (0-5cm) were sampled at 13 sites along channel. Thus,Geoaccumulation Index (Igeo), Enrichment Factor (EF) Sediment Pollution (SPI) calculated assess chemical quality these sediments. metal contents follow following order abundance: Fe >Al>Mn> Zn >Cr>Cu > Co> Ni >Pb> As> Cd. Igeo geo-accumulation index FE reveal moderate polymetallic contamination several elements. results show being most concerning. As for (SPI), it reports low, high pollution