Assessment of Metals Accumulation in Selected Dumpsites of Oyo Township, Southwestern Nigeria

Abstract

Dumpsoil samples from nine refuse dumps and one control site in Oyo Township were analysed for Lead (Pb), Zinc (Zn), Cadmium (Cd), Iron (Fe) and Chromium (Cr). Samples were obtained at depths of 0-0.5m, 0.5-1m, 1-1.5m and 1.5-2.0m. The values of  concentration of  Pb, Zn, Cd, Fe and Cr in the dumpsite  soil samples in mg/l ranged from 0.01-3.20, 0.01-3.72, 0.01-3.37 and 0.001-3.16 respectively. The concentrated trend recorded in the analyses  is in the order of  Pb<Zn<Cd<Fe<Cr. The concentration of metals  at the dumpsoils  and control sampled site showed that there was remarkable  of increase in the  concentration of trace metals from sampled   dumpsoils compared to the sampled soil at the control site. It is observed that these  values of the observed in view of high concentration require an urgent attention. It is recommended that the  refuse dumps should be relocated outside Oyo township and appropriate remedial measures  soils should be initiated at the dumpsites locations to map up the leachates.

Keywords: Dumpsites, Soils,  Heavy Metals, Oyo Township, Remediation