황해 표층퇴적물과 부유입자내 잔류성 유기오염물질의 분포

Abstract

Persistent organic pollutants such as polychlorinated biphenyls, DDTs, HCHs, and other organochlorine pesticides were measured in sediment and suspended particles collected from the Yellow Sea in 2004. Among the target organochlorine compounds, PCBs, DDTs, and HCHs were major contaminants in this region. Their maximum contamination levels in sediments, except for those in dumping zone, are comparable to about 60% of levels determined in overall Korean coastal sediments. However, the concentration levels in dumping zone were similar to those found in industrialized coastal regions of Korea. Especially, high levels of DDTs and HCHs were determined in sediment layer of the dumping zone, indicating that this zone can be a source of these pesticides in the Yellow Sea. Sediment and suspended particle showed the same homologue composition of PCBs with tri- and tetra-chlorinated CBs as dominant isomers. In the water column, most target organochlorine compounds showed high concentration in the upper layer and then gradually decreased towards the bottom, indicating that atmosphere is the major input pathway of the persistent organic contaminants to the marine environment.