State Environmental Protection Key Laboratory of Environmental Risk Assessment and Control on Chemical Process, East China University of Science and Technology, Shanghai 200237, China.
Chemosphere. 2012 Sep;88(11):1375-82. doi: 10.1016/j.chemosphere.2012.05.048. Epub 2012 Jun 21.
Twenty-eight sediment samples were collected from the Taihu Lake and analyzed to acquire information about the levels, distribution, possible sources, time trend and inventory of polybrominated diphenyl ethers (PBDEs) in the Taihu Lake. Our results showed that the most abundant BDE congeners in surface sediments were BDE-47, 99 and 209, with a median value of 0.124, 0.279, and 22.72 ng(gdw)(-1), respectively. The levels of BDE-209 in our samples were much higher relative to those of the other BDE congeners and made up more than 80% of the PBDEs levels in almost all samples. Disregarding BDE-209, among the seven PBDEs (BDE-28, 47, 99, 100, 153, 154, 183) more concerned, the most abundant ones were BDE-47 and 99, which contributed 44.65% (ranged from 29.02% to 73.11%), 24.24% (ranged from 2.27% to 39.66%) to ∑(7)PBDEs, respectively. The correlation between PBDE and TOC was poor, indicating that PBDEs concentrations in sediments of the Taihu Lake were controlled not only by TOC contents, but also by a combined effect of transport, mixing, depositional mechanisms associated with PBDEs, uncontaminated sediments, or fresh input of PBDEs. As expected, the time trend of PBDEs concentration in surface sediment from Taihu Lake were increasing, and the inventory of ∑(25)PBDEs and BDE-209 were estimated to be 3668 kg and 26296 kg.
从太湖采集了 28 个沉积物样本，分析这些样本可以了解太湖中多溴二苯醚（PBDEs）的水平、分布、可能的来源、时间趋势和储量。我们的研究结果表明，在表层沉积物中最丰富的 BDE 同系物是 BDE-47、99 和 209，中位数分别为 0.124、0.279 和 22.72ng（gdw）（-1）。我们的样本中 BDE-209 的水平明显高于其他 BDE 同系物，在几乎所有样本中，BDE-209 占 PBDEs 水平的 80%以上。在更受关注的 7 种 PBDEs（BDE-28、47、99、100、153、154、183）中，除了 BDE-209 之外，含量最高的是 BDE-47 和 99，分别占∑（7）PBDEs 的 44.65%（范围为 29.02%至 73.11%）和 24.24%（范围为 2.27%至 39.66%）。PBDE 与 TOC 之间的相关性较差，这表明太湖沉积物中 PBDEs 的浓度不仅受 TOC 含量的控制，还受与 PBDEs 相关的运输、混合、沉积机制、未受污染的沉积物或 PBDEs 的新鲜输入等综合因素的影响。正如预期的那样，太湖表层沉积物中 PBDEs 浓度呈上升趋势，∑（25）PBDEs 和 BDE-209 的储量估计分别为 3668kg 和 26296kg。
