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中文摘要：
采用GC-MS对淮南至蚌埠段淮河流域水源地、支流及排污口采集沉积物中18种多环芳烃（PAHs）进行定量分析.结果表明,研究区水源地及其支流沉积物中PAHs含量范围为308.12～1090.37ng/g;排污口沉积物PAHs范围为1308.36～8793.16ng/g.沉积物PAHs组成以3～4环PAHs为主,5～6环PAHs相对较少.相对于TOC,BC与沉积物总PAHs的含量相关性更好.PAHs组成特征、主成分分析及多特征比值揭示淮南至蚌埠段淮河流域沉积物PAHs主要来源于化石燃料的不完全燃烧,还有少量石油类产品的输入.生态风险评价结果显示,研究区沉积物中多数PAHs化合物已超出ER-L值和ISQV-L值,而姚家湾排污口沉积物PAHs部分化合物已超出ER-H值和ISQV-H值,表明沉积物中的PAHs对研究区环境已造成了极大的生态风险.
英文摘要：
Using GC-MS 18 PAHs have been quantified in sediments from water source areas,tributaries and sewage outfalls at the reaches of Huaihe River （Huainan to Bengbu）. The results show that the concentrations of total PAHs ranged from 308. 12-1 090. 37 ng/g in sediments from water source areas and tributaries,and 1 308. 36-8 793. 16 ng/g in sediments from sewage outfalls. 3-4 rings were the dominant compounds compared to the 5-6 ring PAHs. Black carbon showed better correlation to PAHs than that of TOC. The composition characterization,principal component analysis and particular ratios of PAHs demonstrated that incomplete combustion of fossil fuels was the main source of PAHs in sediments at reaches of Huaihe River（Huainan to Bengbu）,as well as a few anthropogenic releases of oil products. Ecological risk assessment indicated that,most of PAHs compounds in sediments have exceeded ER-L and ISQV-L values,among which part PAHs compounds at Yaojiawan even exceeded ER-H and ISQV-H values,showing the significant potential risk of PAHs to the ecosystem in the study area.
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