Composite samples were
collected from the six refuse dumpsites and analyzed for heavy metals
concentrations using atomic absorption spectrometer (AAS VGB 210 system). The
concentrations of the heavy metals in (mg/Kg) were in the following order:
Fe>Mn>Cu>Zn>Ni>Co>Cd>V>Pb. The values of the heavy
metals observed in the different dumpsites were lower than their corresponding
average value in shale. However, the values from the different dumpsites showed
some relationship with industrial activities. In each of the metals, the
highest values were obtained in parts of Port Harcourt where there is serious
presence of industrial work. The contamination factor (CF) revealed that
dumpsites soils were not contaminated with any of the heavy metals and do not
seem to pose danger presently. Therefore, more regulatory activities by the
relevant agencies should be put in place as to forestall future occurrence of
accumulation that might pose danger to the environment.
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