中文摘要：

采用气相色谱一质谱方法对东平湖表层沉积物中13种多环芳烃进行了分析测定，结果表明：东平湖PAHs含量为49．40—133．67ng／g，湖东南站位表层沉积物中PAHs总量含量最高。多环芳烃的含量沿湖水流向依次降低。分析发现东平湖表层沉积物中PAHs主要污染源为燃料燃烧、油类高温裂解、泄露。东平湖表层沉积物中的PAHs污染生态风险较低，单个点位芴的浓度稍高，存在潜在生态风险。

英文摘要：

13 kinds of polycyclic aromatic hydrocarbons （PAHs） in surface sediments of the Dongping Lake were analyzed using GC-MS. Total PAHs concentration ranged from 49.40 to 133.67 ng/g. Total PAHs concentration in the south of the lake is much higher than that in the north. The highest levels of PAHs were detected in the southeastern of the lake. The main sources of these PAHs are incomplete combustion of fossil fuel and wood, petroleum pyrolysis and leak. Serious ecological risk didnt exist,but in some areas fluorene posed a potential risk,as it was slightly higher than the effects range low.