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ABSTRACT
The concentrations of heavy metals in different scrap metal dump sites in Benin City environs were investigated in this work to determine the level of heavy metal contamination in the soils. The soils were characterized in terms of pH, metal geochemical form and the total concentration of the metals in the soil were evaluated using standard procedures and soil samples were collected at a depth of 15 and 30 cm. The pH of the different soil samples ranged from 6.31 to 6.74 while iron had the highest total concentration of all metal fractions. The residual metal fraction had the least concentrations of zinc, lead and Cu while the exchangeable metal fraction had the least concentration of iron. The total heavy metal concentrations in the different metal dumpsites follows the order, Fe (16.733.01 mg/kg) > Cu (5.758.46 mg/kg) > Zn (4.980.62 mg/kg) > Pb (0.170.12 mg/kg). The mean concentration of metals and the total concentrations of metals in the different dump sites and different depth of 15cm and 30cm follows the order; Fe > Cu > Zn > Pb. The concentrations of the metals were below the WHO standard and indicate that the soils are healthy for agricultural purposes.
