Soils Pollution in Some Metals in a Solid Waste Dump in Yamoussoukro, Cote d’Ivoire

Some metals inputs within the solid waste dump were studied through the Pollution Load Index (PLI). High levels in cadmium (4.00±0.62 mg.kg-1), lead (138.43±51.5 mg.kg-1) and zinc (266.63±42.83 mg.kg-1) and low levels in copper (40.77±11.98 mg.kg-1) were measured within the soils at five sites against a control. The total concentrations in metals were measured in soil samples collected from the surface to 1.5 m depth. The measurements showed in total metal concentration decrease from surface to depth in lead, zinc and copper. Cadmium was measured to be constant with the depth of study. The values of Pollution Load Index pointed out strong contaminations in metals of the soils surface layers at overall area of study. PLI decreased from 5.13 to 1.33 with respect to the increase in depth in that landfill. The soils clay contents were showed to be the major factor for controlling the metals distribution within those soils.