Temporal trends of polychlorinated biphenyls in precipitation in Beijing, China
文献类型：期刊论文
| 作者 | 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
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| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2012 |
| 卷号 | 56页码:222-227 |
| 关键词 | Polychlorinated biphenyls Precipitation Flux Beijing |
| 英文摘要 | 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. |
| 学科主题 | Environmental Sciences & Ecology; Meteorology & Atmospheric Sciences |
| 收录类别 | SCI |
| WOS记录号 | WOS:000306347900027 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/223897]  |
| 专题 | 高能物理研究所_院士 高能物理研究所_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. |
入库方式： OAI收割
来源：高能物理研究所
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