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| Yoko Kiyomoto | |
| Seikai National Fisheries Research Institute, Fisheries Agency | |
| 3-30 Kokubu-machi, Nagasaki 850-0951, Japan | |
| Tel: +81-95-822-8158 Fax: +81-95-821-4494 | |
| E-mail: ykiyo@snf.affrc.go.jp |
¡¡9,887,000 Yen
¡¡(FY 1999: 4,878,000 Yen)
¡¡An examination of the source and behavior of organic pollutants is essential in preserving environmental conditions in the East China Sea. The distribution of hazardous chemicals in the seawater, aerosol, and sediments of the East China Sea was studied based on samples taken during phase 1 (May 1996 and July-Aug. 1997) and phase 2 (Sept.-Oct. 1998 and Oct.-Nov. 1999). Organic halides such as hexachlorocyclohexane (HCH), chlordane, and nonachlore were detected in seawater and aerosol samples. ¦Á-HCH was more abundant than the other HCH isomers in the aerosol samples; ¦Â-HCH was more abundant in the seawater samples, with increased concentrations in low-salinity water. These results imply that ¦Á-HCH and ¦Â-HCH were transported mainly by air and river water, respectively, and suggest that the Changjiang discharge is one of the sources of hazardous chemicals in the East China Sea. Although the concentration distributions of chlordane and nonachlore in seawater were complex, their concentrations in aerosol samples were highest on days with rough weather, suggesting that they are carried into the area by rainfall and strong wind.
¡¡East China Sea, Organic Pollutants, Hazardous Chemicals, Route of Supply