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Home  >  Volume 35

Assessment of Trace Metals Contamination of Soils Around Berre, a Densely Populated Area of Ibadan, Southwestern Nigeria by Roland A. Isibor (pages 323-334)
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This study was carried out to assess the level of some trace metal contamination around Berre, a densely populated area of Ibadan. In order to achieve this objective, seventeen 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. Three indices of environmental contamination were applied to the data set in order to ascertain the level of contamination by these metals. The three indices of contamination applied were geoaccumulation index, contamination factor, and degree of contamination. Results indicated that the mean concentration of the metals in the soils was in the order Mn>Zn>Pb>V>Cr>Cu>Sr>Ni>Co>Sc>As>Mo>Cd. Factor analysis indicated four elemental groupings. Factor 1 included Zn, Mn, Sr and Cd. Factor 2 included Mo, As, V and Cr. Factor 3 included Ni, Sc and V, while Factor 4 included Cu, Pb and Co. These metals associations wereinfluenced mainly by lithology, geochemical affinity and anthropogenic activities. The geoaccumulation index showed that the soils were moderately contaminated by Mo, Ni, Co, Mn, Sc, As, Sr, V and Cr, considerably contaminated by Cu and Pb, and very highly contaminated by Zn and Cd.  The degree of contamination 35.23 is very high indicating a soil and environment with high metal pollution. This level of pollution is very significant and a treat to man’s environment and health.

Keywords:Densely populated area, Contamination Factor, Degree of Contamination, Geo-accumulation Index, Soils.