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광양만내 지속성유기염소계화합물의 잔류농도 및 분포특성

Environmental Occurrence of Persistent Organochlorinces in Gwangyang Bay

임운혁|심원준|오재룡|홍상희
한국환경생물학회 (Korean Society Of Environmental Biology)|2004.03|환경생물 (Korean Journal of Environmental Biology)|제22권 제1호|pp. 30-37

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초록

Abstract

- Persistent organochlorine compounds (OCs) were determined in sedimentsand bivalves from Gwangyang Bay. The concentrations of ∑PCB, ∑DDT, ∑HCH and∑CHL in sediments were in the range of 2.25 ~ 11.4 ng g-1, 0.16~ 1.16 ng g-1, nd~ 0.51 ngg-1, and 0.05 ~ 0.79 ng g-1, respectively. The overall OCs concentrations in sedimentswere below the effect range -median(ER -M) values for benthic organisms suggested byNOAA (1991). Levels of PCB compounds are relatively lower than other industrializedbays (Pusan Bay, Ulsan Bay, and Youngil Bay). OCs accumulated in bivalves werehigher than those in sediments. In bivalves, the concentration ranges of ∑PCB, ∑DDT,∑HCH and ∑CHL were 9.97 ~ 31.7 ng g-1, 7.54~ 22.6 ng g-1, 0.49~ 2.0 ng g-1, and 0.82 ~ 7.32ng g-1, respectively. Relatively high PCB concentrations in both environmental matri-ces are found at the inner bay than the outer part, indicating that the sources of PCBswere located inside the bay. DDT compound showed relatively high concentrations inthe vicinity of the mouth of river and urban area, whereas other organochlorine pesti-cides show homogeneous distributions over the bay. Homologue profile of PCB com-pounds shows that low-chlorinated congeners (especially, di -, tri- and tetra -) areabundant in Gwangyang Bay, which is different from other areas in Korea.

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