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Journal of the Korean Society for Environmental Analysis 2015;18(3):131-143.
Distribution of Organic Matter and Trace Metal Concentrations in Surface Sediments around the Hansan-Geoje Bay
한산거제만 주변 퇴적물의 유기물과 미량금속 분포 특성
황동운, 이인석, 최민규, 심정희
국립수산과학원
Abstract
The grain size, the content of ignition loss (IL), and the concentrations of chemical oxygen demand (COD), acid volatile sulfide (AVS), and trace metals (Fe, Mn, Cu, Pb, Zn, Cd, Cr, As, and Hg) in surface sediments around the Hansan-Geoje Bay were measured in order to understand the pollution level and potential ecological risk of organic matter and trace metals in sediments around fish and shellfish farming areas. The combined content of silt and clay in sediments was more than 90% and the sediment types were mainly mud and clay, which implies that organic matter and trace metals were easily accumulated in the sediments of the study region. There was no spatial difference for the IL content in sediments around the Handsan-Geoje Bay. However, the concentrations of Fe, Mn, Cr and Cu were relatively higher in channels around the Hansan Island, whereas the concentrations of As, Cd, Hg, Pb, and Zn were relatively higher in the Geoje Bay. The results of three assessment techniques (sediment quality guidelines [SQGs], pollution load index [PLI] and ecological risk index [ERI]) suggested that the surface sediments in the study region were not polluted with organic matter and trace metals.
Key Words: Sediment, Organic matter, Trace metal, Pollution, Hansan-Geoje Bay


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