Spatial Variation and Binding Behavior of Cu and Pb in Surface Sediments of Klang River

In this investigation, concentration, distribution and risk associated with trace metals connected with urban and industrial discharge were studied to assess an overall classification of Cu and Pb as well as their risk status in the surface sediments of Klang River. Sequential extraction technique (SET) was used to evaluate the four (exchangeable, acid-reducible, oxidisable-organic and residual) fractions in surface sediment. The total concentrations of metals were ranged (9.47-66.74 µg g-1) for Cu and (24.78-62.35 µg g-1) for Pb. The fractionation of studied metals (except Cu) in most stations were in the order of residual> acid-reducible> oxidisable-organic> exchangeable. The degree of surface sediments contamination was computed for Risk Assessment Code (RAC), Individual Contamination Factors (ICF) and Global contamination factor (GCF). The result of these indices showed that none of studied metals had high potential risk to fauna and flora of the Klang River, although those stations near-by anthropogenic influx had high adverse impact in contrast with the rest stations