黄河兰州段水环境中多环芳烃污染初步研究  

Preliminary Study on PAHs in Aquatic Environment at Lanzhou Reach of Yellow River

作　　者：王平[1] 徐建[1] 郭炜锋[1] 戴树桂[1] 

机构地区：[1]南开大学环境科学与工程学院,天津300071

出　　处：《中国环境监测》2007年第3期48-51,共4页Environmental Monitoring in China

基　　金：国家自然科学基金委员会-水利部黄河水利委员会联合资助(50239060)

摘　　要：2004年11月对黄河兰州段11个采样点的水样、悬浮颗粒物和表层沉积物中的多环芳烃（PAHs）污染作了初步研究。调查结果显示，在此河段中，16种优先控制的PAHs均有检出，总PAHs浓度范围分别为水中，2920～6680ng／L；表层沉积物中，960～2940ng／g（干重）；悬浮物中，4145～29090ng／g（干重）；其中含量较高的是茬和芘，且分子量较小的PAHs所占的比例较大。来源分析结果显示，黄河兰州段水环境中PAHs的来源是燃烧源和石油源混合的结果。为混合输入型。用生物学阈值对表层沉积物质量进行评价，黄河兰州段表层沉积物的PAHs污染不算严重，偶尔会产生负面生态效应。16 priority polycyclic aromatic hydrocarbons （PAHs） in water phase, surface sediments and suspended particle samples from 11 sites in Lanzhou Reach of Yellow River were investigated in November 2004. The results showed that the 16 PAHs were detectable in the three matrices. The total concentrations of 16 PAHs were 2920 - 6680ng/L in the water, 960 - 2940ng/g dry wt in surface sediments, and 4145 - 29090ng/g dry wt in suspended particles. Chrysene and pyrene had the high quantity percentage, and the lower-molecular-weight PAHs occupied larger proportion of the total PAHs. According to the observed molecular indices, PAHs in aquatic environment in Lanzhou Reach of Yellow River originated both from the high-temperature pyrolytic processes and from the petrogenic source, showing a mixed PAH input pattern. According to the numerical effect-based sediment quality guidelines （SQGs） of the United States, the levels of PAHs in surface sediment of this reach would not exert adverse biological effects.

关 键 词：多环芳烃 悬浮物 表层沉积物 黄河兰州段 

分 类 号：X522[环境科学与工程—环境工程]