Abstract
The distribution of total petroleum hydrocarbon in topsoils from various parts of Ibadan city, Nigeria, was studied. Samples were selected from around the following zones: a) railway tracks, b) petrol stations, c) refuse dumps, d) residential areas, e) high traffic density areas, f) mechanical workshops, and g) control zones. Contamination of the topsoil with hydrocarbons was significant only around petrol stations and mechanical workshops where the factors of accumulation were 10.1 and 4.72, respectively. The general trend in hydrocarbon levels was petrol station > mechanical workshop > refuse dumps > high traffic areas > rail tracks > control zones residential areas. The results highlight the need to monitor urban environments that are remote from petroleum exploration activities for petroleum hydrocarbon contamination.
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