Author(s)

W. Chen, S.K. Tan & J.H. Tay

Abstract

The concentrations of heavy metals in the suspended and bed sediments in the urban receiving water, i.e., Kranji and MacRitchie reservoirs in Singapore were investigated. Distribution of heavy metals in the suspended sediments of different grain size was determined. The results show that more than 50 % of heavy metals in the aquatic system are carried by suspended sediments in the urban runoff to the receiving waters. Heavy metals are most likely to be transported by particles of grain size > 1.2 urn. Elevated concentration of heavy metals in the interstitial water of the bed sediment are potential threat to the quality of water and aquatic life. 1 Introduction Suspended and bed sediments have been recognized as sources of heavy meta

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