Abstract
This study was carried out to determine the level of soil contamination by metals around some automobile mechanic workshops in Oyo town in order to assess their possible adverse health implications on man and his environment. Concentrations of metals above certain levels have been shown to impair man’s health. Automobile mechanic workshops are sources of metals discharge into the environment and most of these workshops in Oyo are sited within residential areas. 12 samples of top soils were therefore collected from some automobile mechanic workshops within Oyo town and analyzed for Lead (Pb), Manganese (Mn), Zinc (Zn), Chromium (Cr), Vanadium (V), Copper (Cu), Strontium (Sr), Cobalt (Co), Nickel (Ni) and Cadmium (Cd) using the Inductively Coupled Plasma Mass Spectrometry (ICP-MS) technique. The indices of contamination including Geo-accumulation index, Contamination Factor, and Degree of Contamination were used to determine the pollution status of the soils. Pb and Zn were the main metals of pollutant status with Pb having very high Contamination Factor, and the soils in general showing very high degree of contamination. This high level of Pb and Zn in the environment is significant with possible health risk to man and his environment. Keywords: Automobile mechanic workshops, Contamination Factor, Degree of Contamination, Geo-accumulation Index, Oyo town, Soils
Highlights
Human civilization and development has led to rapid industrialization and urbanization of our societies
Geoaccumulation index, contamination factor and degree of contamination were applied in determining the level of contamination of the soils
The mean concentration of the metals in the soils around some automobile mechanic workshops in Oyo town as shown by this study was in the order Pb>Mn>Zn>Cr>V>Cu>Sr>Co>Ni>Cd
Summary
Human civilization and development has led to rapid industrialization and urbanization of our societies. It is important to determine the concentration and degree of metal contamination in soils around these mechanic workshops in order to estimate possible health risks on the inhabitants of Oyo town. This study is aimed at the determination of concentrations and degree of trace metals contamination in soils around some automobile
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