Speciation of selected heavy metals (copper (cu), lead (pb), Zinc(Zn), Manganese(mn), iron(fe) and aluminium(ai) in coastal sediment off Terengganu

Abstract

A study on speciation of selected heavy metals (Cu, Pb, Zn, Mn, Fe and Al) using the sequential extraction method in sediment were analyzed from 16 stations along Terengganu coast. In this study, the mobilization of metals chemical reaction were investigated with 5 geochemical fractions; exchangeable, carbonate, Fe-Mn hydroxides, organic and residual phases. The extraction data shows most of the selected metals were naturally occurred where 50% of concentrations contain in residue phase except for Mn. Pb was found associated with all extractants, Zn and Mn were found associated with FeMn oxides and residual. Therefore, the South China Sea was not polluted.