EVALUATION OF HEAVY METALS PRESENT ON SELECTED LOCATIONS FROM THE UGBOWO CAMPUS OF UNIVERSITY OF BENIN.
Assessing the contamination of potentially harmful metals in roadside soils within the campus is essential so as to examine the possible risks to inhabitants within the campus. Introduction of these harmful metals may be due to increase in daily vehicular movement on the roads. The top soil of five selected location were collected within the campus during the raining season to determine the presence of Pb, Cu, Cd and Zn and to access their level of contamination, using Enrichment Factor(EF), Geoaccumulation Index(Igeo), Pollution Load Index(PLI) and Contamination Factor(CF). The concentration of Pb, Cu, Cd and Zn in each of the site was lower than the European Union standard for permissible level of heavy metals present in the soil except for site A were the concentration of Cd was 37 ppm. The enrichment factor for Pb, Cu, Cd and Zn in site A was <2. For site C, D and E the enrichment factor EF of Pb was > 2. The pollution load index PLI for site C was <1 while that of sites A, B, D and E were >2. The index of Geoaccumution factor Igeo for all the sites was <2. The contamination factors of Pb, Cu and Zn in sample A, B, C, D and E falls within the range of 1 ? CF ? 3 except for sample E where Pb was within the range 3 ? CF < 6.