Anthropogenic impacts on heavy metal concentration

Authors: Bintal Amin Ahmad Ismail Aziz Arshad Chee Kong Yap Mohd Salleh Kamarudin

Publish Date: 2008/02/15

Volume: 148, Issue: 1-4, Pages: 291-305

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Abstract

Concentrations of Cd Cu Pb Zn Ni and Fe were determined in the surface sediments to investigate the distributions concentrations and the pollution status of heavy metals in Dumai coastal waters Sediment samples from 23 stations representing 5 different site groups of eastern central and western Dumai and southern and northern Rupat Island were collected in May 2005 The results showed that heavy metal concentrations in μg/g dry weight Fe in were 088 046–189 608 161–1384 3234 1463–8490 5389 3149–8711 1148 726–1997 and 301 210–392 for Cd Cu Pb Zn Ni and Fe respectively Generally metal concentrations in the coastal sediments near Dumai city center eastern and central Dumai which have more anthropogenic activities were higher than those at other stations Average concentration of Cd in the eastern Dumai was slightly higher than effective range low ERL but still below effective range medium ERM value established by Long et al Environmental Management 19181–97 1995 Environmental Toxicology Chemistry 174714–727 1997 All other metals were still below ERL and ERM Calculated enrichment factor EF especially for Cd and Pb and the Pollution load index PLI value in the eastern Dumai were also higher than other sites Cd showed higher EF when compared to other metals Geoaccumulation indices I geo in most of the stations all site groups were categorized as class 1 unpolluted to moderately polluted environment and only Cd in Cargo Port was in class 2 moderately polluted Heavy metal concentrations found in the present study were comparable to other regions of the world and based on the calculated indices it can be classified as unpolluted to moderately polluted coastal environment

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