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Title: Heavy metals contaminations in some selected dumpsites in Benin City, Nigeria
Authors: Atedhor, G.O.
Issue Date: 2012
Publisher: Ife Research Publications in Geography
Series/Report no.: Vol. 11 (1);97-110
Abstract: This paper investigated the contaminations of heavy metals (Fe, Mn, Zn, Cu, Cr, Cd, Pb, Ni) in the soils in three dumpsites (Asoro, Iguomo and Oluku/Otofure) in Benin City in order to ascertain if they are within permissible limits. Soil samples were collected at 0-30 cm depth at three points (centre of dumpsites, 10 m and 20 m away) with the aid of auger. The soil samples were labeled and taken to the laboratory for analyses using atomic absorptions spectrometer (AAS). Pearson Product Moment Correlation, mean were used to examine the relationships between the heavy metals and the variations of the concentrations of the heavy metals revealed strong correlations with other heavy metals which suggest that they have common contamination sources. While the concentrations of Fe at the centre of the dumpsites exceeded the limit recommended by the European Regulator Standard, at 10m radius away from the centre of the dumpsites, Asoro and Iguomo exceeded the limit but at 20m radius from the centre of the dumpsites, only Iguomo exceeded the recommended limit. Cd contamination exceeded permissible limit at the centre of Iguomo and Oluku/Otofure dumpsites while the recommended for remediation and a parameter fence should be erected at Oluku/Otofure and Asoro dumpsites to prevent livestock from grazing on grasses within the dumpsites to reduce the risk of heavy metals transfer through the food chain
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