长三角部分城市污泥PAHs质量分数及特征分析

Contents and Characteristics of Polycyclic Aromatic Hydrocarbons in Municipal Sewage Sludge from Cities in Yangtze River Delta Area

采用气相色谱-质谱仪,对长江三角洲41家代表性城市污水处理厂的污水污泥中PAHs含量进行了分析.结果表明:污泥中普遍含有PAHs化合物,多数主要以3环,4环PAHs占优,而易挥发的2环和难降解的5环,6环PAHs相对较少.污泥中w(PAHs)为8.543～55.807μg/g,不同污泥样品间差异显著;不同城市间的w(PAHs)差异较大,平均值为浙江(34.117μg/g)>江苏(19.487μg/g)>上海(10.665μg/g);不同污水处理类型的城市污泥w(PAHs)差异较小,总体上为工业污水污泥(28.912μg/g)>混排污泥(26.843μg/g)>生活污水污泥(26.843μg/g).

Concentrations of polycyclic aromatic hydrocarbons （PAHs） in sewage sludge derived from 41 typical municipal wastewater treatment plants （WWTPs） in the Yangtze River Delta area of China were determined by gas chromatography-mass spectrometry （GC- MS）. The results showed that the sewage sludge samples contained polycyelic aromatic hydrocarbon compounds generally, among which 3-ring and 4-ring compounds were predominant, while the volatile 2-ring and refractory 5-ring and 6-ring compounds were less. The total quantity of PAHs ranged from 8. 543 to 55. 807μg/g. Significant differences existed between EPAHs content from different sludge samples. PAHs in different regions were significantly different, which average is Zhejiang （34. 117 μg/g） 〉 Jiangsu （19. 487 μg/g） 〉 Shanghai （ 10. 665μg/g） ; PAHs of different types urban sludge is little difference, which average is industrial sewage sludge （28.912μg/g） 〉 scramble the sludge （26. 843μg/g） 〉 sewage sludge （26. 843μg/g）.