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环境化学  2015 

典型区域土壤中PCB-11的污染特征

Keywords: PCB-11,土壤,城市地区,电子垃圾拆解地,污染特征

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Abstract:

利用高分辨气相色谱/高分辨质谱法研究了土壤中PCB-11(3,3'-二氯联苯,CAS2050-67-1)的污染特征和分布规律,探讨了土壤中PCB-11的污染来源.结果表明,我国一般城市地区(天津、鞍山)和电子垃圾拆解地周边土壤中PCB-11的检出率为100%,PCB-11可能广泛存在于土壤介质中.天津、鞍山、电子垃圾拆解地土壤中PCB-11的平均浓度分别为163ng·kg-1(21-750ng·kg-1)、90ng·kg-1(16-215ng·kg-1)、108ng·kg-1(33-291ng·kg-1).电子垃圾拆解地土壤中PCB-11对总PCBs浓度的贡献(0.02%-2.4%)明显低于一般城市地区(1.1%-23%).天津、鞍山土壤中PCB-11的来源可能不同于电子垃圾拆解区.

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