北京玉渊潭水相、悬浮物和沉积物中的多环芳烃

Studies on PAHs in water, suspended particular matter and sediment of Yuyuantan Lake, Beijing

研究了北京玉渊潭水相、悬浮物和沉积物中多环芳烃（PAHs）的含量、分布特征及污染来源．结果显示，丰水期和枯水期水样中PAHs的含量分别为164．0-230．6ng／L和132．5-890．8ng／L．悬浮物和沉积物中PAHs含量分别为47．5～75．3ng／L和475．3-954．7ng／g，沉积物中PAHs含量与清淤前相比有很大的降低．水样和悬浮物中PAHs以低分子量的为主，而在沉积物中高分子量的PAHs占有较高比例．水相、悬浮物和沉积物三者之间PAHs含量的分析表明，水相和悬浮物有一定相关性，相关系数为0,6．沉积物中PAHs的含量与有机质的含量有很明显的相关性，相关系数为0．96．PAHs的污染来源主要是热裂解造成的．

The content, distribution character and pollution resource of PAHs in water, suspended particular matter and sediment of Yuyuantan Lake, Beijing were studied. Contents of PAHs in water samples of rainy and dry seasons were 164.0-230.6ng/L and 132.5-890.8ng/L. The PAHs contents in suspended particular matter and sediment were 47.5-75.3ng/L and 475.3-954.7ng/g respectively, the main PAHs contents decreased very greatly compared with that before cleaning the sludge. The PAils in water and suspended particular matter was mainly the low molecular weight of PAHs while in the sediment the high molecular weight of PAHs occupied the higher composition. The analysis of correlation of PAils contents in three phase showed that water phase had little correlation property with suspended particular matter, with correlation factor of 0.6. The PAHs contents in sediment had very obvious correlation property with the content of organic matter, with correlation factor of 0.96. The source of PAHs were mainly pyrolysis.