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Home  >  Volume 35

Assessment of Trace metal contamination of soils around New Garage Motor Park in Ibadan, southwestern Nigeria by Roland A. Isibor (pages 335-346)
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In order to assess the level of metals concentrations and possible contamination around the New Garage motor park in Ibadan, fourteen topsoil samples were collected and analyzed for Mo, Cu, Pb, Zn, Ni, Co, Mn, Sc, As, Sr, Cd, V, and Cr using the Inductively Coupled Plasma Mass Spectrometry (ICP-MS) technique. Indices of contamination including geoaccumulation index, contamination factor and degree of contamination were applied to the data set in order to determine the level of these metals contamination of the soils. Results showed that the mean concentration of the metals were in the following order: Mn>Pb>Zn>Cr>V>Cu>Sr>Ni>Co>Sc>As>Mo>Cd. Elemental associations, as determined by factor analysis, indicated four metal groupings. Generally, the metals associations in the soils were influenced mainly by rock types, geochemical affinity and anthropogenic input. Results of the geoaccumulation index showed a soil that is practically uncontaminated to extremely contaminated by the metals studied. Cd and Pb showed considerable contamination factor and very high contamination factor respectively. The overall assessment of the soils of the New Garage motor park area using the degree of contamination indicated a soil with very high degree of contamination with a value of 48.84. This study showed that the soils around the New garage motor park is highly contaminated by the metals studied with possible severe health implications.

Keywords:Geoaccumulation index, Contamination factor, Degree of contamination, Soils, Motor Park, Ibadan.