北京市平原区土壤中PAHs分布特征与来源分析  

Distribution and source analysis of PAHs in the surface soil in the Beijing Plain

作　　者：郭娜[1,2] 王金生[1,2] 翟远征[1,2] 滕彦国[1,2] 

机构地区：[1]北京师范大学水科学研究院,北京100875 [2]地下水污染控制与修复教育部工程研究中心,北京100875

出　　处：《水文地质工程地质》2014年第6期110-115,共6页Hydrogeology & Engineering Geology

基　　金：国家环保公益性行业科研专项(201009009);国家自然科学基金项目(41302179)

摘　　要：PAHs的性质使其容易在土壤中富集,且因难降解和毒性大而成为土壤污染治理的重点。本研究测试了北京市东南部地区土壤和地下水中的PAHs含量,同时对近年来北京平原区土壤中PAHs的其它监测数据进行了联合分析。研究结果表明:(1)北京市平原区土壤中16种PAHs的平均值为936.9μg/kg,处中度污染水平且接近重度污染;(2)土壤中PAHs的来源表现出一定的地带分布规律,其中林地和果园的污染源主要为石油输入源,其它区域的污染源主要为不同类型的燃烧源(木材、煤、石油、汽油等)或混合源;(3)地下水中PAHs的种类明显比土壤中的少,但是以具较强毒性的二环和三环PAHs为主,主要原因为低环的PAHs主要以溶解态形式在土壤中迁移,容易进入浅层地下水。Human activities have led to soil contamination,and PAHs is the key because of its peculiar properties called recalcitrance and toxicity.The soil samples in the southeast of Beijing are collected and tested combined with the statistics data of PAHs in Beijing Plain in recent years.The result indicates that（1）∑PAHs residues in the study area are at the medium level of averaged 936.9 μg /kg,but the content of PAHs varies greatly in different places.（2） The content of PAHs in the soil follows a certain pattern that PAHs in forest land and orchards are mainly from oil or partly from soil organic matter and PAHs in the other areas are mainly from combustion sources.（3） The migration of 2,3-PAH can easily occur in the dissolved state and contribute to groundwater pollution.

关 键 词：PAHS 土壤 污染源 源解析 北京 

分 类 号：X131.3[环境科学与工程—环境科学]