钱塘江齐溪水库表层沉积物中多环芳烃的分布研究

Distribution of PAHs in sediments in Qixi reservoir of Qiantang river

多环芳烃（PAHs）作为一种典型的持久性有机污染物（POPs）,具有高毒性,难降解,可生物积累等特点,会对生态环境和人体健康造成严重危害.本研究采集了位于钱塘江源头的齐溪水库不同区域的沉积物样品,样品经预处理后通过GC-MS分析,结果表明：齐溪水库中PAHs在沉积物中的质量分数为26.17-2 013.25ng/g,人为活动频繁区域附近的点位样品质量分数普遍偏高,PAHs同系物主要以高环芳烃为主.

Persistent organic pollutants which have high toxicity,terrible biological degradability and high degree of bioaccumulation,can cause serious harm to the ecological environment and human health. Polycyclic aromatic hydrocarbons（PAHs）,a typical persistent organic pollutants,have become a increasingly serious problem which has attracted global attention.The source reservoir of Qiantang river（Qixi reservoir）as the research object was investigated,and sediment samples at different places were collected.PAHs mass fractions in each sample were determined by GC-MS.The results showed that the mass fractions of PAHs in sediments of Qixi reservoir were 26.17-2 013.25ng/g.From the positions of these sampling points,we could find that the mass fractions of samples with great anthropogenic effect were higher than the others.The polyaromatics occupied larger proportion of the total PAHs based on the composition analysis.