Li Kun, Zhao Gao-feng, Zhou Huai-dong, Zeng Min, Liao Bo-han, Wu Zheng-yong, Zhang Pan-wei, Liu Min
China Institute of Water Resources and Hydro-power Research, Beijing 100038, China.
Huan Jing Ke Xue. 2012 Aug;33(8):2574-9.
Eighty-one surface water samples were collected from 3 tributaries of the Yangtze River in different periods. Contents of 28 PCB congeners in surface water samples were measured using Varian CP3800/300 GC-MS/MS technique. PCB8, 18, and 28 are the most predominant PCB congeners in the samples from tributaries. The measured level of PCBs in the samples from the Tuo river, downstream of Ouchi River and Songlihongdao tributary were 1.96-2.59 ng x L(-1), 1.84-2.54 ng x L(-1) and 1.52-2.38 ng x L(-1). The average concentrations of PCBs in the samples were lower than USEPA criterion continuous concentration (14 ng x L(-1)), which were also in the same order of magnitude of those reported with lower levels in European and American countries. The estimated cumulative cancer risk for the local residents who drink water from tributaries were 0.15 x 10(-7)-0.26 x 10(-7), which shows that cancer risk are negligible due to PCBs contamination in these samples.
在不同时期从长江的3条支流采集了81份地表水样本。采用Varian CP3800/300 GC-MS/MS技术测定了地表水样本中28种多氯联苯同系物的含量。多氯联苯8、18和28是支流样本中最主要的多氯联苯同系物。沱江、藕池河下游和松澧洪道支流样本中多氯联苯的测定水平分别为1.96 - 2.59 ng x L(-1)、1.84 - 2.54 ng x L(-1)和1.52 - 2.38 ng x L(-1)。样本中多氯联苯的平均浓度低于美国环境保护局的标准连续浓度（14 ng x L(-1)），也与欧美国家报道的较低水平处于同一数量级。估计从支流取水的当地居民的累积癌症风险为0.15 x 10(-7)-0.26 x 10(-7)，这表明这些样本中多氯联苯污染导致的癌症风险可忽略不计。
