DETERMINATION OF HEAVY METAL CONTENTS IN SOIL FROM SELECTED DUMPSITES IN KADUNA METROPOLIS, KUDUNA STATE, NIGERIA.

ABSTRACT The potential threat of heavy metals from solid wastes dumpsites in urban cities to our environment and human heath has led to many studies to fine out the level of its risk to human health. In this study, determination of heavy metals content in soil fromsolid waste dumpsites in Kaduna metropolis of Kaduna state, Nigeria was carried out using Contamination Factor index.Soilsamples were collected from three selected dumpsites in Kaduna metropolis respectively. Control samples were obtained at about 200m away from the dumpsites, using standard sampling methods. Soil extracts was analyzed using, Atomic Absorption Spectrophotometric (AAS) method and subjected to statistical analysis. The results showed that; Heavy metals (Fe, Zn, Cu, Mn, Cr, Ni, Cd and Pb) mean- concentration (mg/kg) from the solid waste dumpsites were; 2,387.7, 1,123.0, 362.0, 956.1, 161.8, 44.9, 16.0 & 242.4 respectively. While, the concentrations obtained from the control site for; Fe, Zn, Cu, Mn, Cr, Ni, Cd &Pb were; 5,167.8, 520.0, 80.1, 267. 0, 105.3, 12.8, BDL & 107.4 respectively. The trend of heavy metals contamination status from the solid waste dumpsites, were; Cu>Ni>Pb> Zn >Mn> Cr> Fe, ANOVA at P> 0.05 showed that, there was no significant difference in the concentrations of Zn, Mn, Cr, Ni& Cd, while, the concentrations of Fe, u&Pb_ were significantly different. The concentration of metals in the soil from the dumpsites were above the world soil average and......