[Distribution, possible source and ecological risk assessment of polycyclic aromatic hydrocarbons in river sediments from a typical contaminated area].
[Distribution, possible source and ecological risk assessment of polycyclic aromatic hydrocarbons in river sediments from a typical contaminated area].
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发表时间：
2010
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通讯作者：
Xue-tong Wang;Y. Jia;Yang-zhao Sun;Yu-feng Jiang;Fei Wang;Ming-hong Wu;G. Sheng;Jia-mo Fu
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作者：
Xue-tong Wang;Y. Jia;Yang-zhao Sun;Yu-feng Jiang;Fei Wang;Ming-hong Wu;G. Sheng;Jia-mo Fu
采用同位素稀释气相色谱/质谱仪(GC/MS)对路桥37个沉积物样品中的16种美国环保局多环芳烃进行了分析，并对其分布特征、来源和生态风险进行了进一步的研究。所有沉积物样品中均检出16种多环芳烃，总含量为59.3~3180微克/公斤，平均为722微克/公斤。与世界各地的其他研究相比，多环芳烃的污染水平可归类为低至中等。SigmaPAHs与总有机碳呈显著正相关(r=0.699，p1)，表明路桥部分沉积物可能存在潜在的生态风险。16种多环芳烃的毒性苯并[a]芘当量(TEQ(Bap))在3.41~485微克/公斤之间，其中98.4%由7种致癌多环芳烃贡献，表明7种多环芳烃是生态风险的主要影响因素。
The concentrations of 16 US EPA PAHs in 37 sediment samples collected from Luqiao were analyzed by isotope dilution gas chromatograph/mass spectrometer (GC/MS), and their distribution characters,sources and ecological risk were further investigated. Each of the 16 PAHs could be detected in all of the sediment samples, the total concentrations of the 16 PAHs in the sediments ranged from 59.3 microg/kg to 3 180 microg/kg,with a mean of 722 microg/kg. The pollution level of PAHs can be categorized as low to moderate when compared with other studies around the world. SigmaPAHs were significantly correlated with TOC (r = 0.699, p 1, indicating that some sediments in Luqiao may have potential ecological risk. The toxic benzo[a]pyrene equivalents (TEQ(BaP)) of the 16 PAHs ranged from 3.41 microg/kg to 485 microg/kg, 98.4% of which was contributed by 7 carcinogenic PAHs, indicating that 7 PAHs were the main influential factors to the ecological risk.