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Levels and distribution of Dechlorane Plus in coastal sediments of the Yellow Sea, North China |
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| Authors: | Zhao Zhen Zhong Guangcai Möller Axel Xie Zhiyong Sturm Renate Ebinghaus Ralf Tang Jianhui Zhang Gan |
| Institution: | a Yantai Institute of Coastal Zone Research, CAS, Yantai 264003, China b Helmholtz-Zentrum Geesthacht, Centre for Materials and Coastal Research, Institute of Coastal Research, Department for Environmental Chemistry, Geesthacht, Germany c Guangzhou Institute of Geochemistry, CAS, Guangzhou 510640, China d Graduate School of the Chinese Academy of Sciences, Beijing 100039, China |
| Abstract: | Dechlorane Plus (DP) has been determined in surface sediments from three Chinese coastal bays, e.g. Jiaozhou, Sishili and Taozi Bay in North China. DP concentrations ranged from <1.2 to 187 pg g−1 dry weight (dw) (mean: 24.7 pg g−1 dw) in Jiaozhou Bay, <1.2 to 135 pg g−1 dw (mean 69.9 pg g−1 dw) in Sishili Bay and <1.2 to 66.7 pg g−1 dw (mean: 40.4 pg g−1 dw) in Taozi Bay, respectively. Additionally, two dechlorinated species were quantified, which accounted for 0.6-5.1% of the ∑DP concentration.The fsyn values (syn-isomer/(syn- + anti-isomer)) in sediments from Jiaozhou Bay (mean 0.29) were close to the technical DP mixture (0.2-0.4), probably indicating local inputs of DP. In contrast, sediments in Sishili and Taozi Bay showed much lower fsyn values (mean 0.16). During transportation the DP isomers are subject to stereo selective degradation which partly resulted in the relative enrichment of anti-DP in coastal sediments. |
| Keywords: | Dechlorane Plus Coastal sediment North China Alternative flame retardant |
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