The Environmentalist

, Volume 28, Issue 4, pp 405–408 | Cite as

Determination of heavy metals in toads exposed to oil polluted environment (Ekpan) Delta State, Nigeria

  • B. O. Otuya
  • E. E. Akporohnor
  • F. I. Achuba


The concentrations of heavy metals (mg/g) Pb, Ni, Cu, Cr, Fe, Co, Cd, and Hg in the tissues of young and adult toads exposed to petroleum-polluted environment were determined in order to assess the impact of petroleum-processing activities in Ekpan. The data showed that the levels of these Metals ranged between 0.15–1.18 and 0.10–0.48 in young and adult toads respectively. The heavy metals concentrations reported for the young toads have an abundance trend in the order of Pb > Fe > Ni > Cr > Cu > Co > Cd > Hg, while those of the adult toads are in the order of Pb > Fe > Cr > Ni > Cu > Cd > Hg > Co. The control analysis was carried out in a non-oil polluted area (Obiaruku) and the values served as base line values for the study.


Pollution Heavy metals Environment Bioaccumulaion 


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • B. O. Otuya
    • 1
  • E. E. Akporohnor
    • 1
  • F. I. Achuba
    • 2
  1. 1.Department of ChemistryDelta State UniversityAbrakaNigeria
  2. 2.Department of BiochemistryDelta State UniversityAbrakaNigeria

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