Enantiomeric Composition of Chiral Polychlorinated Biphenyls in Marine Species and Sediment from Masan Bay

Title
Enantiomeric Composition of Chiral Polychlorinated Biphenyls in Marine Species and Sediment from Masan Bay
Author(s)
홍상희; 심원준; 임운혁; 김용녀
KIOST Author(s)
Hong, Sang Hee(홍상희)Shim, Won Joon(심원준)Yim, Un Hyuk(임운혁)
Publication Year
2007-11-02
Abstract
Chiral environmental chemistry is a new area of research that can provide enhanced insight into environmental fate processes. The enantiomers of a chiral compound may exhibit different biological and toxicological properties from each other and from the racemic mixture, the form in which most chiral xenobiotics are released to the environment. Therefore, understanding the environmental behavior of the enantiomers is important for determining the hazards they pose. Of the 209 PCB congeners, 78 display axial chirality in their non-planar conformations. Nineteen of these atropisomers, as they are called, have three or four ortho chlorines, which provide sufficient steric hindrance to rotation about the central C-C biphenyl bond so that their enantiomers remain stable in the environment. In this study, enantiomeric fractions (EFs) for eight polychlorinated biphenyl atropisomers were measured in environmental matrices by using chiral gas chromatography/mass spectrometry. To observe the change of enantiomeric composition of PCBs in a food chain, sediment, polycheata and flatfish were collected from Masan Bay of Korea. Food web relationship was confirmed with stomach content analysis and stable isotope (13C and 15N) analysis. Nonbiological matrices such as sediment and seawater showed relatively racemic composition of the atropisomers compared to biological matrices, indicating that PCBs were metabolized enantioselectively in biota. Polycheata showed a similar enantiomeric composition with stomach content of flatfish. Compare to polycheata, flat fish showed an enantioselective accumulation for CBs 91, 84, 136, 132 and 149. For CBs 136 and 149, (-)-enantiomer was selectively accumulated in flatfish.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/30247
Bibliographic Citation
한국해양학회 2007년도 추계 학술발표대회, pp.111, 2007
Publisher
한국해양학회
Type
Conference
Language
English
Publisher
한국해양학회
Related Researcher
Research Interests

Microplastic pollution,Persistent Organic Pollutants,Oil Pollution,미세플라스틱 오염,잔류성 유기오염물질,유류오염

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