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Geochemical Characteristics and Heavy Metal Pollutions in the Surface Sediments of Gwangyang and Yeosu Bay, south coast of Korea  

현상민 (한국해양연구원 남해연구소)
이태희 (한국해양연구원 남해연구소)
최진성 (한국해양연구원 남해연구소)
최동림 (한국해양연구원 남해연구소)
우한준 (한국해양연구원 지구환경연구본부)
Publication Information
The Sea:JOURNAL OF THE KOREAN SOCIETY OF OCEANOGRAPHY / v.8, no.4, 2003 , pp. 380-391 More about this Journal
Abstract
Surface sediments were collected from Gwangyang and Yeosu Bays to evaluate their sedimentological characteristics and geochemical aspects of both the benthic environment and heavy metal pollution. The grain size distribution includes both sandy and muddy sediments. Sand-rich sediments occur mainly near the POSCO and the channel between Namhedo and Yeosu Bando, while elsewhere mud-dominated sediments are present. TOC content ranges from 0.2 to 2.1 % and C/N ratios indicate that the range arises from the mix of organic matter. The C/S ratios of this organic matter show that parts of the study area are anoxic or have sub-anoxic bottom conditions. The hydrogen sulfide content of the sediment has a range of 0.7 to 301 ppm, with a high content occurring inshore of Myodo Island, where it indicates a polluted environment. The enrichment factor (Ef) and index of accumulation rate (Igeo) of ten heavy metals (Co, Ni, Cu, Cd, Pb, Li, Zn, V, Cr, Ba) show that parts of the study area contain from one to seven times more Pb and Ba, and from 0.8 to 3.5 times more of the other elements than the mean sediment value. The Igeo values of V and Cd show that different parts of the area can be classified as heavily polluted, heavily to moderately polluted, or more or less unpolluted. Those areas that have both high levels of enrichment and high accumulation rates of heavy metals contain predominantly fine sediments with a high organic matter and hydrogen sulfide content.
Keywords
Gwangyang Bay; Heavy Metal Pollution; Enrichment Factor; Igeo;
Citations & Related Records
Times Cited By KSCI : 7  (Citation Analysis)
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