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Author(s): Sanni Eshovo Blessing, Umoru Titi Abdulasisi, Sule Tunde Usman Nurudeen , Yusuf Inusa.

Volume/Issue: Volume 3 , Issue 5 (2020)

Abstract:

The concentration of the heavy metals, Copper, Chromium, Lead, Nickel and Cadmium was determined using the Atomic Absorption Spectrometer (AAS). This was to ascertain the level of their contributory pollution effect on the soils around a refuse dumpsite located in Jattu, Etsako west local government area of Edo state, Southern Nigeria. Samples were obtained at the centre of the dumpsite and at lateral intervals of 50meters, and 100meters away from the centre of the dumpsite in the North, East and West directions and at 0-15cm and 15-30cm vertical intervals at each of the sampled points. The results obtained were subjected to a one-way analysis of variance (ANOVA) statistical treatment at P Cu > Pb > Cr > Cd. Concentration values for copper ranged between 0.70mg/kg and 1.78mg/kg, while values for chromium were between 0.11mg/kg and 0.42mg/kg. Recorded value for lead was between 0.08mg/kg and 0.90mg/kg in the study area. Also, Nickel had a concentration value of between 3.76mg/kg and 8.54mg/kg and Cadmium concentration value ranged from 0.07mg/kg to 0.19mg/kg. In Comparism of the heavy metals concentrations from this study with the Department of Petroleum Resources (DPR) target and intervention values (2002) guideline, all the concentration values obtained in this study were below the target and intervention values of the Department of Petroleum Resources guideline. Results from the Analysis of variance and the correlation analysis both suggests that the metals are not site dependent and are therefore of similar origin. Results for the relative pollution potential of the investigated heavy metals gave positive values for all the metals at all sampled points, indicating that the soils were contaminated at the point of impact, which is at the dumpsite.

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