期刊
CHEMOSPHERE
卷 114, 期 -, 页码 340-346出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2014.05.046
关键词
PBDEs; HBCDs; Trophic level; Temporal investigation
资金
- National Natural Science Foundation of China [21377053]
- program of 2012 High Level Foreign Experts - State Administration of Foreign Experts Affairs, the P.R. China [GDW20123200120]
- Einstein Professor Program of the Chinese Academy of Sciences
- Canada Research Chair program, a Visiting Distinguished Professorship in the Department of Biology and Chemistry
- State Key Laboratory in Marine Pollution, City University of Hong Kong
Since the phase-out of PBDEs, reports regarding occurrences of these compounds in the environment have become less frequent. To characterize potential influences of the phase-out of PBDEs' on concentrations in the environment, trends in concentrations as a function of time were investigated for two additive brominated flame retardants, PBDEs and HBCDs. Three aquatic species, including shrimp, common carp, and yellow catfish, were collected from Meiliang Bay of Tai Lake, 2009-2012. The analysis of PBDEs in three aquatic organisms has shown a downward-trend in the first three years but a significant upward-trend in the final year. Concentrations of HBCDs have not shown temporal increases in the investigated environments. Concentrations of both PBDEs and HBCDs in the three studied organisms increased as a function of trophic level, which suggested that these additive flame retardants can be biomagnified through the food web of Tai Lake. In accordance with previous publications, PBDE-47 contributed the greatest proportion of Sigma PBDEs and had a detection frequency of 100%. alpha-HBCD was the predominate isomer that contributed to Sigma HBCDs. Both beta-HBCD and gamma-HBCD were likely detected at lesser concentrations than the a-isomer due to differences in bioavailability. Concentrations of Sigma PBDEs in the three aquatic organisms from Tai Lake ranged from 1.13 to 97.59 ng g(-1) lipid. These concentrations were generally less than those in biota from other countries, but equal to those found at other locations in China. Specimens from the Yangtze River had greater concentrations of Sigma HBCDs (169.6-316.5 ng g(-1) lipid) than those collected at Tai Lake, which were comparatively greater than many reported concentrations in freshwater organisms from other countries. (C) 2014 Elsevier Ltd. All rights reserved.
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