日照近岸海域表层沉积物中多环芳烃的生态风险分析

ECOLOGICAL RISK ASSESSMENT OF PAHs IN THE COSTAL SURFACE SEDIMENTS FROM YELLOW SEA(RIZHAO City)

采用平均效应区间中值商法、有机碳归一化法和效应区间低、中值法3种评价方法,分析日照近岸海域表层沉积物中多环芳烃(PAHs)的生态风险.效应区间低、中值法评价结果表明:岚山头附近海域表层沉积物中16种PAHs可能都存在生态风险;远离岚山头的东部和北部海域以及岚山港南部附近海域表层沉积物中芴和菲可能具有一定的生态风险.平均效应区间中值商法和有机碳归一化法评价结果均显示:岚山头附近海域表层沉积物可能存在相对较高的生态风险,其它海域表层沉积物具有潜在生态风险的可能性较低.平均效应区间中值商法评价结果显示:岚山头附近海域表层沉积物发生毒性的可能性为50%.

Three approaches： effects range low （ERL） and effects range median （ERM） , the organic carbon normalized, mean effects rangemedian quotient （MERM-Q）, were employed to analyze ecological risk of polycyclic aromatic hydrocarbons （PAHs） in the costal surface sediments from Yellow sea （Rizhao city） . It was found that every PAHs in surface sediments of Lanshantou had probably certain risk using ERL and ERM, fluorene and phenanthren in surface sediments had probably certain risk in the north and east of Lanshantou and around the south of Lanshan harbor. The results indicated that the possibility of the ecological risk of PAHs in surface sediments was relatively higher around Lanshantou by MERM-Q and the organic carbon normalized, The potential ecological risk of PAHs in surface sediments was lower in other area. The ecological harm probability was 50% around Lanshantou using MERM-Q.