北京市密云县潮河周边土壤中类二恶英PCBs分析评价  

Analysis and Evaluation of Dioxin-Like Polychlorinated Biphenyl in Soil along Chao River in Miyun County of Beijing

作　　者：于洋[1] 马俊花 莫罹[3] 孔彦鸿[3] 沈珍瑶[1] 李迎霞[1] 

机构地区：[1]北京师范大学环境学院水环境模拟国家重点实验室,北京100875 [2]宁夏交通科学研究所,银川750001 [3]中国城市规划设计研究院,北京100044

出　　处：《生态毒理学报》2015年第2期403-410,共8页Asian Journal of Ecotoxicology

基　　金：国家基金委创新研究群体科学基金(51121003);国家自然科学基金面上项目(51278054)

摘　　要：为了探讨密云水库上游流域可能给水库带来的非点源污染,本研究测定了入库河流潮河下游周边土壤中12种类二恶英多氯联苯（DL-PCBs）的含量水平。结果表明,ΣDL-PCBs的总含量水平为0.0039-0.0365 ng·g-1,其中PCB-118,115,77为12种DL-PCBs的主要成分,PCB-81,114,157均低于检出限。草地、林地和果园中ΣDL-PCBs的含量高于玉米地,表明研究区的DL-PCBs主要受大气沉降和河流沉积物的影响,受当地人类活动影响不大。与其他研究相比,采样区域的PCBs含量总体处于偏低水平,毒性当量处于中等水平。而毒性当量因子（TEF）较高的PCB-126与PCB-169,可能会对人类和生物产生危害,应给予足够的重视。To analyze the possible non - point source pollution influence from upstream area of Miyun Reservior, 12 dioxin - like polychlorinated biphenyl （DL-PCBs） concentrations were determined on soft samples along the lower reach of Chao River. The concentrations of EDL-PCBs ranged from 0.0039 ng.g-1 to 0.0365 ng .g-1 and PCB-118, 115, 77 were the major congeners of the DL-PCBs in this study area. The PCB-81, 114, 157 were all lower than the detection limits. The concentrations of the EDL-PCBs in grass lands, forest lands and orchards were higher than those in corn fields. This implied that DL-PCBs pollution in the study area might be mainly influenced by long - distance atmospheric transportation and deposition and river sedimentations. Lo-cal human activities imposed less impact on DL-PCBs. Compared with other study areas, the mean concentrations of 12 kinds of DL-PCBs in the study area were low. The toxicity equivalency quantity （TEQ） was at a moderate level. PCB-126 and PCB-169, which have higher Toxicity Equivalency Factor （TEF）, should be given more attention since they might be harmful to humans and animals.

关 键 词：类二恶英多氯联苯 潮河 北京 密云 水源地 毒性当量 

分 类 号：X171.5[环境科学与工程—环境科学]