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环境化学  2015 

城市污水处理厂污泥中多氯二苯并二噁英/呋喃的分布特征

Keywords: 二噁英,呋喃,污水处理厂,污泥,分布

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Abstract:

采用同位素稀释法-高分辨气相色谱-质谱测定了2007年北京8个污水处理厂污泥样品中多氯二苯并二噁英(PCDDs)和多氯二苯并呋喃(PCDFs)的分布情况,并根据毒性当量系数计算了污泥中PCDD/Fs的毒性当量(I-TEQPCDD/Fs).样品的I-TEQPCDD/Fs为1.4—15.0pg·g-1dw,平均值为6.0pg·g-1dw,结果表明,污泥中PCDD/Fs的I-TEQs明显低于GB18918—2002《城镇污水处理厂污染物排放标准》中关于污泥农用时PCDD/Fs的标准排放限值(100pg·g-1dw).与2004年相比,2007年污泥中PCDD/Fs的含量已显著降低(P<0.05).

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