【摘要】 调查七里海湿地表层土壤中多环芳烃(PAHs)、多溴联苯醚(PBDEs)及重金属的分布特征。结果表明：七里海湿地东海和西海土壤中的16种PAHs组成分布特征相似，以中高环（4环）PAHs为主，主要来源于石油烃、生物质和煤的燃烧。PAHs生态风险分析显示，七里海湿地中有7种致癌多环芳烃(Ba A,Chr,BbF,Bk F,Ba P,DBA,INP)对人体健康具有较大的潜在风险。此外，BDEs的生态风险分析表明，Penta-BDEs处于极低生态风险；Octa-BDEs和Deca-BDE无生态风险。重金属的平均含量由高到低依次为：Cd> Pb> As> Cu> Cr。生态风险分析显示，Cd为主要潜在生态风险因子。综合生态风险指数显示各采样点均处于轻危害程度(RI <150)，综合生态风险较低。更多还原

【Abstract】 The distribution characteristics of polycyclic aromatic hydrocarbons(PAHs), polybrominated diphenyl ethers(PBDEs) and heavy metals in the surface soil were investigated. The results showed that the composition and distribution characteristics of 16 PAHs in the soils of the east and the west in the Qilihai wetland were similar. The main PAHs were mid-high ring(4-ring) PAHs, which were mainly derived from the combustion of petroleum hydrocarbons, biomass and coal.The ecological risk analysis indicated that seven carcinogenic polycyclic aromatic hydrocarbons such as BaA,Chr,BbF,BkF,Ba P,DBA and INP in the surface soil from the Qilihai wetland have a potential risk to human health. The ecological risk analysis of BDEs showed that penta-BDEs were low ecological risk to organisms, whereas octa-BDEs and deca-BDE has no ecological risks. The order of average contents of heavy metals was as followed: Cd > Pb > As > Cu > Cr. The ecological risk analysis of heavy metals showed that Cd is the main potential ecological risk factor of the soil in Qilihai wetland. The comprehensive ecological risk index showed that sample from each point was at a light hazard level(RI < 150) and the overall ecological risk was relatively low.更多还原