Assessment of Heavy Metal Contamination in Soils Around  Auto-Mechanic Workshops in  Ozoro, Delta State, Nigeria

M.O. Emolade; J.A. Anozie; O.M. Adinkwu; A.O. Isoje; A.E. Aphiar; O.L. Okere; K.I. Balogun; N.J. Ehiwario; J.O. Orogu; U.B. Okobia; O. Ukolobi

doi:10.9734/air/2025/v26i31351

Research Article Open access CC BY 4.0

Assessment of Heavy Metal Contamination in Soils Around Auto-Mechanic Workshops in Ozoro, Delta State, Nigeria

M.O. Emolade, J.A. Anozie, O.M. Adinkwu, A.O. Isoje, A.E. Aphiar, O.L. Okere, K.I. Balogun, N.J. Ehiwario, J.O. Orogu, U.B. Okobia, O. Ukolobi

Advances in Research · pp. 342–350 · Published 30 May 2025

10.9734/air/2025/v26i31351

Abstract

Auto-mechanic activities have been identified as a significant contributor to heavy metal contamination in Nigerian urban ecosystems. This study assessed the impact of such activities on soil heavy metal accumulation by analyzing 28 soil samples (labeled A, B, and C) collected from three auto-mechanic workshops, along with a control sample (D) from an uncontaminated site. Concentrations of lead (Pb), cadmium (Cd), chromium (Cr), copper (Cu), zinc (Zn), and iron (Fe) were determined through laboratory analysis and compared with established environmental quality standards. Elevated levels of copper (6.721 mg/kg), cadmium (0.228 mg/kg), and zinc (58.232 mg/kg) were observed in the sampled soils, suggesting substantial anthropogenic input, particularly from used oil spills. The persistent presence of heavy metals across all sites reflect the environmental risks associated with improper waste handling in automobile repair stations. It is recommended that appropriate containment systems, such as oil collection drums and sealed containers, be implemented to mitigate further contamination and protect soil quality.

Automobile mechanic workshop soil heavy metal

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M.O. Emolade, J.A. Anozie, O.M. Adinkwu, A.O. Isoje, A.E. Aphiar, O.L. Okere, K.I. Balogun, N.J. Ehiwario, J.O. Orogu, U.B. Okobia, O. Ukolobi (2025). Assessment of Heavy Metal Contamination in Soils Around Auto-Mechanic Workshops in Ozoro, Delta State, Nigeria. Advances in Research , 342–350. https://doi.org/10.9734/air/2025/v26i31351

Affiliations

M.O. Emolade — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.
J.A. Anozie — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.
O.M. Adinkwu — Department of Plant Science and Biotechnology, Faculty of Science, Southern Delta University, Ozoro, Delta State, Nigeria.
A.O. Isoje — Department of Biochemistry and Molecular Biology, Faculty of Science, Dennis Osadebay University Asaba, Delta State, Nigeria.
A.E. Aphiar — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.
O.L. Okere — Department of Science Laboratory Technology, Faculty of Science, Southern Delta University, Ozoro, Delta State, Nigeria.
K.I. Balogun — Department of Microbiology, Faculty of Life Sciences, University of Ilorin, Nigeria.
N.J. Ehiwario — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.
J.O. Orogu — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.
U.B. Okobia — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.
O. Ukolobi — Department of Microbiology, Faculty of Science, Southern Delta University, Delta State, Nigeria.

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