Li Kun, Zhao Gao-Feng, Zhou Huai-Dong, Liu Xiao-Ru, Yu Li-Qin, Wen Wu, Zhang Pan-Wei
China Institute of Water Resources and Hydro-power Research, Beijing 100038, China.
Huan Jing Ke Xue. 2013 Jun;34(6):2198-204.
A total of 28 surface sediment samples (at the top 0-5 cm layer) were collected from the Three Gorges Reservoir of Yangtze River. The content of polybrominated diphenyl ethers (PBDEs) in sediments was measured with Varian GC-MS (NCI). The results showed that sigma26 PBDEs and BDE209 both had a low concentration in sediments, with a mass concentration of 35.24 pg x g(-1) and 11.92 pg x g(-1), respectively. Among the 26 PBDEs, BDE28, 47, 77 and 99 were the most predominant sigma26 PBDEs congeners. The highest concentrations of sigma26 PBDEs and BDE209 were detected in the sediment samples collected from Long River, with geometric mean of 146.07 and 502.63 pg x g(-1), respectively. A significant correlation was found between sigma26 PBDEs and BDE209, indicating that they might have the same pollution source. The concentrations of sigma26 PBDEs and BDE209 in the sediment were in the same order of magnitude with those reported on background levels in sediments of remote lakes in other countries, which shows the toxic biological effects on aquatic biota and potential risk due to sigma26 PBDEs and BDE209 contamination in sediments are negligible.
从长江三峡水库采集了总共28个表层沉积物样本（取自顶部0 - 5厘米层）。采用瓦里安气相色谱 - 质谱联用仪（负化学电离模式）测定沉积物中多溴二苯醚（PBDEs）的含量。结果表明，Σ26种多溴二苯醚和十溴二苯醚（BDE209）在沉积物中的浓度均较低，质量浓度分别为35.24皮克/克和11.92皮克/克。在这26种多溴二苯醚中，BDE28、47、77和99是最主要的Σ26种多溴二苯醚同系物。在从长河采集的沉积物样本中检测到Σ26种多溴二苯醚和BDE209的最高浓度，几何平均值分别为146.07皮克/克和502.63皮克/克。发现Σ26种多溴二苯醚和BDE209之间存在显著相关性，表明它们可能具有相同的污染源。沉积物中Σ26种多溴二苯醚和BDE209的浓度与其他国家偏远湖泊沉积物背景水平报告中的浓度处于同一数量级，这表明沉积物中Σ26种多溴二苯醚和BDE209污染对水生生物群的毒性生物学效应和潜在风险可忽略不计。
