Bioaccumulation and enatioselective trophic transfer of polychlorinated biphenyls in a benthic food chain

Title
Bioaccumulation and enatioselective trophic transfer of polychlorinated biphenyls in a benthic food chain
Author(s)
홍상희; 심원준; 김용녀; 임운혁
KIOST Author(s)
Hong, Sang Hee(홍상희)Shim, Won Joon(심원준)Yim, Un Hyuk(임운혁)
Publication Year
2010-01-23
Abstract
Numerous anthropogenic pollutants are chiral in nature. It is known that chiral molecules which are released to the environment as a racemic degrade and metabolize enantioselectively, and sequentially changed their chirality. Since enantiomers of chiral compounds exhibit different biological and toxicological properties, understanding the environmental behavior of the enantiomers in the environment is important for determining the hazards they pose. We conducted a study that assessed the trophic transfer of PCB congeners in a benthic food chain. Particular emphasis was placed on understanding the behavior of the enantiomers of PCBs in the food chain. Sediment, polychaeta and flatfish were collected from a semi-enclosed bay of Korea and analyzed for concentrations and enantiomeric fractions of PCB congeners. Stomach content and stable isotope of carbon and nitrogen were analyzed in samples and used to confirm the prey and predator relationship between them. The PCB concentrations in the samples clearly showed that PCB was biomagnified up the food chain. Additionally, congener pattern is similar to between the food chain members, implying that PCB pattern in each food source is reflected into its consumer. However, they had different chiral signatures, indicating that PCBs were accumulated enantioselectively through the food chain. Congeners in sediment were racemic or near racemic compared to biological samples. For CB 136 and CB 149, preferential enrichment of (-)-enantiomer relative to (+)-enantiomer was observed in ascending food chain. For CB 91 and CB95, E1 was enriched.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29088
Bibliographic Citation
International Symposium on Trace Organic Pollutants in the Environment, pp.16, 2010
Publisher
Bharathidasan University
Type
Conference
Language
English
Publisher
Bharathidasan University
Related Researcher
Research Interests

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

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