Distribution of Different Fractions of Lead at Various Horizons of Contaminated Soil Pedons of Coimbatore District, Tamilnadu

摘要

The risk to the environment from contaminated soil can not be assessed by simplyconsidering the total amount of potentially toxic metals within the soil because thesemetals are not necessarily completely mobile or bioavailable. Hence, it is necessary toreduce the fraction of toxic elements which is potentially mobile or bioavailable. Totallead varied from traces to 250 mg/L. The amounts of other lead fractions were 1.31,4.81, 85.81, 89.31, 63.52 and 50.81 mg/L for water soluble, exchangeable and adsorbed,organically bound, carbonate bound, Fe-Mn oxide, and residual fractions respectively.Mobile form of lead was very dangerous and mostly seen in roadside profiles ofGanapathy and Ukkadam.