用长链烷基苯示踪生活污水对珠江三角洲水域的污染

The pollution of Pearl River Delta waters by the tracing domestic sewage of linear alkylbenzenes (LABs)

以长链烷基苯（LABs）作为生活污水排放的示踪剂，测定了珠江三角洲主要河流及邻近南海北部海域表层沉积物中LABs浓度．结果表明珠江、东江、西江、伶仃洋及南海北部海域样品中LABs的浓度分别为58．5～2332．1，96．9～565．8，20．5～57．0，5．8～25．8，2．5～23．1ng／g．LABs的I／E值表明，研究区域内生活污水基本上未处理或处理效率低下．对LABs与多环芳烃及多溴联苯醚的相关性分析表明，城市污水的排放是该区域内这些有机污染物的重要来源之一．

The concentration of linear alkylbenzenes （LABs） in the surface sediments of the main rivers of Pearl River Delta and its nearby South China Sea area was measured utilizing GC-MS. The concentration of ∑LABs in the samples of Zhujiang River, Dongjiang River, Xijiang River, Pearl River Estuary and northern South China Sea area were 58.5～2332.1, 96.9～565.8, 20.5～57.0, 5.8～25.8, 2.5～23.1ng/g, respectively. The I/E value of LABs showed that the domestic sewage discharged in this region was basically without treating or poorly treated. The correlation analysis of LABs with polycyclic aromatic hydrocarbons （PAHs） and polybrominated diphenyl ethers （PBDEs） showed that the discharge of urban sewage was one of the important sources of these organic pollutants.