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Temporal trends of polychlorinated biphenyls in precipitation in Beijing, China
Yang GS(杨国胜); 马玲玲(多); Xu DD(徐殿斗); Yang, GS; Ma, LL; Xu, DD; Liu, LY; Jia, HL; Chen, Y; Zhang, YB; Chai, ZF; Chen Y(陈扬); Chai ZF(柴之芳)
2012
发表期刊ATMOSPHERIC ENVIRONMENT
卷号56页码:222-227
摘要Temporal trend of polychlorinated biphenyls (PCBs) was determined in precipitation and monthly depositional fluxes were calculated in Beijing for the first time from February 2009 to March 2011. Total PCBs concentrations ranged from 7.00 to 993 ng L-1 in dissolved phase and from 1.00 to 133 ng L-1 in particulate phase, with a two orders of magnitude variation. Concentrations of PCBs were dominated by dissolved phase, which accounted for 82.5% of the total PCBs in precipitation, implying PCBs enrichment in rainwater due to efficient scavenging of highly contaminated gas phase and nonfilterable submicron particles which easily adsorbed organic contaminants in urban atmosphere. Highest concentrations of PCBs were measured in snow, which were about two times higher than those in rainwater, demonstrating more efficient scavenging of PCBs by snow. The sum of bi-, tri- and tetrachlorinated congeners accounted for 70.5% of total PCBs in precipitation, suggesting that PCBs mainly come from the historical usage of domestic PCB product, e.g., trichlorobiphenyl. PCBs concentrations in both dissolved and particulate phases showed slow rate of decline, with a half-life of 16.9 years in precipitation, suggesting that the atmospheric concentrations of PCBs were decreasing slowly in Beijing. The wet deposition flux of Sigma PCBs ranged from 0.240 to 6.55 mu g m(-2) month(-1) (mean: 1.41 mu g m(-2) month(-1)), indicating a relatively high level of PCBs contamination in Beijing atmosphere. (C) 2012 Elsevier Ltd. All rights reserved.
关键词Polychlorinated biphenyls Precipitation Flux Beijing
学科领域Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences
DOI10.1016/j.atmosenv.2012.03.070
收录类别SCI
WOS记录号WOS:000306347900027
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/223897
专题院士
多学科研究中心
推荐引用方式
GB/T 7714
Yang GS,Ma LL,Xu DD,et al. Temporal trends of polychlorinated biphenyls in precipitation in Beijing, China[J]. ATMOSPHERIC ENVIRONMENT,2012,56:222-227.
APA 杨国胜.,马玲玲.,徐殿斗.,Yang, GS.,Ma, LL.,...&柴之芳.(2012).Temporal trends of polychlorinated biphenyls in precipitation in Beijing, China.ATMOSPHERIC ENVIRONMENT,56,222-227.
MLA 杨国胜,et al."Temporal trends of polychlorinated biphenyls in precipitation in Beijing, China".ATMOSPHERIC ENVIRONMENT 56(2012):222-227.
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