【摘要】 长江口滨岸潮滩14个表层沉积物中多环芳烃(PAHs)分析表明,PAHs总量分布范围在0.263~6.372mg/kg.多环芳烃含量随取样位置发生明显的变化,主要特征是在近排污口处含量最大,而远离排污口含量趋于降低.依据荧蒽/芘之比以及2+3环与4环以上PAHs化合物分布特点,表明长江口近岸潮滩沉积物中PAHs主要来自石油类污染物的输入.通过与国内外河口潮滩沉积物中PAHs含量的对比,研究区处于低-中等水平,但已有个别PAHs化合物(如蒽、芴)超过基于生物毒性试验的沉积物质量标准,对潮滩生态将构成一定的潜在危害.更多还原

【Abstract】 The analysis of PAHs in 14 surface sediments of tidal flats of the Yangtze Estuary showed that total PAHs concentration ranged from 0.263 to 6.372mg/kg. The contents of total PAHs varied dramatically with the sampling region. They are characterized by greatest content near sewage discharge point with trend to decrease by increasing distance. Petroleum-derived contamination may be dominant source in the study area, depending on the distributions of fluoranthene/pyrene and 2+3 ringed and 4 ringed PAHs compounds in surface sediments. The degree of sediment contamination by PAHs in study area is moderate/low in comparison with other internal and external estuarine and tidal flat surface sediments. However, anthracene and fluorene exceed the effects range low (ER-L) values, which might certain potential damage to the Yangtze tidal flat ecosystem.更多还原