Abstract
Sequential extraction was applied to determine the chemical association of some heavy metals in municipal waste in Bida. The results of the study show that competition for the binding phase occurs, and oxidisable fraction was found to be more accessible to heavy metal than all other solid phases. Among the five heavy metals studied in these wastes, the mean of the amount of Pb bound to oxidizable fraction was the highest (102 mg/kg) and the lowest was Cu bound to the residual fraction (4.59 mg/kg). Loading plots obtained from the results of principal components analysis show the data point for Fe and Sn bound to exchangeable fraction clustered. It was observed that the municipal waste was not highly contaminated, with most metal concentrations below the permissible levels for the application to agricultural land as regulated by the US EPA.
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