Spatial distribution and anthropogenic assessment of heavy metals in the surface sediments of Klang River.

The study was conducted to quantify the concentration and distribution of metals (Cd, Zn, Ni, Cu, Pb, and Fe) in the surface sediments and to assess the status of metal contaminations in the Klang River, Malaysia. The concentrations of metals (μg/g, Fe%, dry weight) were as follows: 0.57-2.19 μg/g Cd; 31.89-272.33 μg/g Zn; 5.96-24.47 μg/g Ni; 10.57-52.87 μg/g Cu; 24.23-64.11 μg/g Pb and 1.56%-3.03% Fe. Sequential extraction technique (SET) showed that mean anthropogenic portions of metals were in the order of Zn (60.22%), Cu (56.01%), Cd (45.63%), Ni (42.08%), Pb (33.22%) and Fe (10.26%). The highest concentrations of metals (p