河南省城市污泥中多环芳烃的含量及其影响因素研究

Content and Influencing Factors of Polycyclic Aromatic Hydrocarbons in Henan Province Sewage Sludge

为了解河南省污泥中多环芳烃含量及分布特征，采用GC-MS，对河南省18个城市污水处理厂的污泥中的多环芳烃组成及含量进行了分析。结果表明，18个城市污泥中PAHs组成和含量相差较大，含有9-16种PAHs化合物，以含2-4个苯环的化合物为主，5-6个苯环的化合物含量均较低。其中污水的来源、污水处理工艺及污泥的处理方式都会影响污泥中多环芳烃的组成及含量。除驻马店市污泥中多环芳烃总含量达到53．5mg／kg外，其他17个地市污泥中ΣPAHs含量在0．84-5．39mg／kg，平均值为2．21mg／kg：具有致癌性的PAHs的含量在0．07-1．58mg／kg，具有强致癌性的苯并[a]芘除在郑州市污泥中未检出外，在其他17个市污泥中的含量在0．07-0．82mg／kg之间，平均值为0.21mg／kg，符合我国农用污泥控制标准3.0mg／kg的限值。

To understand the concentration of polycyclic aromatic hydrocarbons and its distribution characteristics of sludge in of Henan province, using GC-MS, we have analyzed the composition and content of polycyclic aromatic hydrocarbons in sewage treatment plant sludgein 18 cities of Henan province. The results showed that the composition and content of PAHs in sludge of 18 cities were in comparatively large difference, containing 9-16 kinds of PAH compounds, mainly containing 2-4 benzene ring compounds, while 5-6 benzene ring compounds content are low. The source of sewage, wastewater treatment process and sludge treatment will affect the composition and in the sludge .In addition to the total PAHs in Zhumadian sludge whose content of polycyclic aromatic hydrocarbons reached 53.5 mg/kg, the other 17 selected sludge Σ PAHs contents are in 0.84-5.39 mg/kg, with a mean of 2.21 mg/kg; The content of carcinogenic PAHs are in 0.07-1.58 mg/kg, the strong carcinogenic Benzo [a] pyrenewhich are not checked out in Zhengzhou city sludge, have a content range between 0.07-43.82 mg/kg in 17 other municipal sludge, with a mean of 0.21 mg/kg, conforming to our country agricultural sludge control standard limit of 3.0 mg/kg.