Determination of trace metal concentrations in soil profiles of municipal waste dumps in Nigeria |
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Authors: | Chukwujindu M A Iwegbue Godwin E Nwajei Jude E Ogala and Chukwudumebi L Overah |
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Institution: | (1) Department of Chemistry, Delta State University, PMB 1, Abraka, Nigeria;(2) Department of Geology, Delta State University, PMB 1, Abraka, Nigeria |
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Abstract: | The concentrations of trace metals (Cd, Pb, Cu, Cr, Fe, Ni, Zn and Co) were studied in soil profiles of eight municipal waste
dump sites in Warri metropolis. The results indicate that concentrations of trace metals varied widely among the different
dumpsites and decreased with depths in a studied soil profile. The accumulation pattern for the heavy metals in the soil profiles
follows the order: Fe > Pb > Mn > Co > Cr > Zn > Ni > Cu > Cd. The concentrations of metals found in these sites was below
the Canadian remediation criteria for land for agricultural, residential and commercial/industrial purposes except for the
cadmium levels in some sites that exceeded criterion values for agricultural and residential. In such sites, remedial actions
are required before any form of chosen development can take place. The levels of heavy metals found in these dump sites were
higher than that of the control site. The examined metals showed no significant correlation with soil physicochemical properties
at the surface horizon, which is suggestive evidence that these metals arise from anthropogenic input. |
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