Journal of Applied Sciences and Environmental Management (Jan 2020)

Assessment of heavy metal levels of Agodi Reservoir in Ibadan, Nigeria

  • P.O. Ogungbile,
  • J.A. Akande,
  • T.O. Ogunbode,
  • O Odekunle

DOI
https://doi.org/10.4314/jasem.v23i11.10
Journal volume & issue
Vol. 23, no. 11

Abstract

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The quality of water discharged into Agodi Reservoir was determined by the levels of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn. Water samples were collected from the inlet, centre and outlet locations of the reservoir and their heavy metal contents were determined by standard methods using Atomic Absorption Spectrophotometer (AAS) over a period of twelve (12) months covering both rainy and dry seasons. Test location differences and seasonal variations were examined using ANOVA at P Fe (43.75) > Zn (23.13) > Cu (12.44) > Co (0.19) > Ni (0.17) > Cd (0.12). Concentrations of Cr and Pb were below detectable level. Compared to WHO recommended limits, Co fell below while others were higher than thresholds. It is concluded that Agodi Reservoir water has a potential environmental hazard unless treated before use. Keywords: Agodi Reservoir, heavy metals, pollution, seasonal variation

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