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Paper Details

Contributions of Automobile Mechanic Sites to Heavy Metals in Soil: A Case Study of North Bank Mechanic Village Makurdi, Benue State, Central Nigeria

Aloysius A. Pam *, Rufus ShaAto 1 and John O.Offem2

Journal Title:Journal of Chemical, Biological and physical sciences

The distribution of six heavy metals (Pb, Cu, Zn, Mn, Ni and Cd) in soil around North Bank automobile mechanic site in Benue State, North Central Nigeria were studied using AAS. Results of the analysis revealed that majority of heavy metal concentrations (mgkg-1 ) of the samples were above background levels and threshold limits recommended for soils in some countries. The results indicate the following levels Cu, (24.6mgkg-1), Pb (123 mgkg-1), Zn (42.7 mgkg-1), Mn (92.0mgkg-1), Ni (8.44mgkg-1) and Cd (0.60 mgkg-1) with a distribution pattern in the order: Pb>Mn>Zn>Cu>Ni>Cd. Factors which influence the mobility of metals in soils were determined such as pH, cation exchange capacity, organic matter, moisture content and soil texture. Geoaccumulation index values of the metals in soils under study showed that the environment is highly polluted with Pb and Cu, and to a lesser degree with Ni. Both Cd and Mn showed moderate pollution status while the soil remains unpolluted with Zn.