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Title: Heavy Metals Contamination in Some Selected Dumpsites in Benin City
Authors: Atedhor, G.O
Orobator, P.O
Keywords: Dumpsite
heavy metals
European regulatory standard
Benin City
Issue Date: 2012
Publisher: Ife Research Publications in Geography
Series/Report no.: Vol. 11, No. 1;Pp. 97-110
Abstract: This paper investigated the concentrations of heavy metals (Fe,Mn,Zn,Cu,Cr,Cd,Pd and 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 0-30cm depths at three points (center of dumpsites,10m and 20m away) with the aid of soil auger.The soil samples were labelled and taken to the laboratory for analysis using atomic absorption spectrophotometer (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 at 10m and 20m radii from the center of the dumpsites respectively. Some of the heavy metals reveal strong correlations with other heavy metals which suggest that they have common contamination sources. While the concentration of Fe at the center of the dumpsite exceeded the limits recommended by European regulatory standards, at 10m radius away from the dumpsite,Asoro and Iguomo exceeded the limit. But at 20m radius from the center of the dumpsite only Iguomo exceeded the recommended limit. Cd contamination exceeded permissible limit at the center of Iguomo and Oluku/Otofure dumpsites while the concentration of Cu exceed ed the permissible limit at the center of Asoro dumpsite.The three dumpsites are recommended fo remediation and a perimeter 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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