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Issue 6, 2010
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Levels and distributions of PBDEs and PCBs in sediments of the Bohai Sea, North China

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Abstract

Fifty-four surface sediments covering the whole water body of the Bohai Sea in North China were collected and analyzed for PBDEs and PCBs, to acquire information about their levels, distributions and possible sources. The results show that BDE 209 is the predominant congener with a mean value of 7000 pg g−1 dry weight, two orders of magnitude higher than other BDE congeners. The concentrations of ΣPBDE7 (including BDE 28, 47, 99, 100, 153, 154 and 183) range from 220 to 900 pg g−1 dw. Significant correlations were found between BDE congeners and total organic content (TOC) (r2 = 0.48–0.73). Pearson analysis shows that most tri- to hepta-BDE congeners were closely correlated (r2 > 0.69). Congener patterns varied little among most of the samples and all the detected BDE congeners make a relatively equal mass contribution to ΣPBDE7. Such a profile is notably different from any of the BDE commercial products. As for PCBs, only a few congeners were detected in certain samples. They ranged from nd-610 pg g−1 dw with a mean value of 145 pg g−1 dw, at the lower end of the range reported in remote areas of Europe and North America. The overall burdens of ΣPBDE7 and BDE 209 within the upper 3 cm sediment layer were estimated to be 0.95–1.25 t and 11–19 t respectively. The latter accounts for about 0.008–0.014% of total BDE 209 produced in China from 1999 to 2006.

Graphical abstract: Levels and distributions of PBDEs and PCBs in sediments of the Bohai Sea, North China

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Publication details

The article was received on 07 Jan 2010, accepted on 23 Mar 2010 and first published on 14 May 2010


Article type: Paper
DOI: 10.1039/C000340A
Citation: J. Environ. Monit., 2010,12, 1234-1241
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    Levels and distributions of PBDEs and PCBs in sediments of the Bohai Sea, North China

    X. Pan, J. Tang, J. Li, Z. Guo and G. Zhang, J. Environ. Monit., 2010, 12, 1234
    DOI: 10.1039/C000340A

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