ISSN : 2488-8648
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×published date:2016-Dec-14
FULL TEXT in - | page 30 -38
Abstract
Soils samples taken at depths, 0 – 15, 15 – 30, 30 – 45, and 45 – 60 cm from ten automobile workshops in Sapele metropolis were investigated for heavy metals and physico-chemical properties using standard methods. The pH ranged observed was 5.09 - 6.39. At all locations investigated, the heavy metals (Zn, Mn, Pb, Cu, Cr, and Cd) obtained were much higher than that from the control sample. This is an indication that automobile workshops situated within the metropolis are anthropogenic sources of heavy metals in the soils that requires attention. The concentrations of Zn, Cu and Cd at most locations and depths were also higher than the recommended critical limits. The concentrations of the metals generally decrease with increase in depths. The extent of contamination level based on the average metal contents obtained from soil samples at the different depths was 57.69 - 129.58 folds for Zn, Manganese was 27.74 - 69.20 fold, while Pb, Cu, and Cr, were respectively 17.95 - 55.97, 8.39 - 14.82, and 113 - 504 fold compared with the control soil. Cadmium was not detected in control soil but values ranging from 1.70 to 8.89 mg/kg were recorded for the automobile workshops soils. The degree of metal pollution was in order: Oleh Road > Reclamation/Green-Egbede Road > Awolowo/Okpe Road > Okerigwre Road > Akintola Road > Shell Road > Gana New Road > Ajogodo Road > Ogodo Road > McPherson Road.
Keywords: automobile workshops, contamination, heavy metals, pollution, soil profile
FULL TEXT in - | page 30 -38
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P.M.B. 126, Yenagoa. Bayelsa state Nigeria
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