Size distribution and sorption of polychlorinated biphenyls during haze episodes
文献类型：期刊论文
| 作者 | Liang, Yong; Liu, Guorui ; Zhu, Qingqing; Zheng, Minghui; Zhang, Xian; Gao, Lirong; Sua, Guijin
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| 刊名 | ATMOSPHERIC ENVIRONMENT
 |
| 出版日期 | 2018 |
| 卷号 | 173页码:38-45 |
| 关键词 | Polychlorinated biphenyls Atmosphere Haze Particle size distribution Sorption mechanism |
| ISSN号 | 1352-2310 |
| 文献子类 | Article |
| 英文摘要 | There is a lack of studies on the size distribution of polychlorinated biphenyls (PCBs) during haze days, and their sorption mechanisms on aerosol particles remain unclear. In this study, PCBs in particle-sized aerosols from urban atmospheres of Beijing, China were investigated during haze and normal days. The concentrations, gas/particle partitioning, size distribution, and associated human daily intake of PCBs via inhalation were compared during haze days and normal days. Compared with normal days, higher particle mass-associated PCB levels were measured during haze days. The concentrations of Sigma PCBs in particulate fractions were 11.9-134 pg/m(3) and 6.37-14.9 pg/m(3) during haze days and normal days, respectively. PCBs increased with decreasing particle size ( >10 mu m,10-2.5 mu m, 2.5-1.0 mu m, and <= 1.0 mu m). During haze days, PCBs were overwhelmingly associated with a fine particle fraction of <= 1.0 mu m (64.6%), while during normal days the contribution was 33.7%. Tetra-CBs were the largest contributors (51.8%-66.7%) both in the gas and particle fractions during normal days. The profiles in the gas fraction were conspicuously different than those in the PM fractions during haze days, with di-CBs predominating in the gas fraction and higher homologues (tetra-CBs, penta-CBs, and hexa-CBs) concurrently accounting for most of the PM fractions. The mean-normalized size distributions of particulate mass and PCBs exhibited unimodal patterns, and a similar trend was observed for PCBs during both days. They all tended to be in the PM fraction of 1.0-2.5 mu m. Adsorption might be the predominating mechanism for the gas-particle partitioning of PCBs during haze days, whereas absorption might be dominative during normal days. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/41039]  |
| 专题 | 生态环境研究中心_环境化学与生态毒理学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Liang, Yong,Liu, Guorui,Zhu, Qingqing,et al. Size distribution and sorption of polychlorinated biphenyls during haze episodes[J]. ATMOSPHERIC ENVIRONMENT,2018,173:38-45. |
| APA | Liang, Yong.,Liu, Guorui.,Zhu, Qingqing.,Zheng, Minghui.,Zhang, Xian.,...&Sua, Guijin.(2018).Size distribution and sorption of polychlorinated biphenyls during haze episodes.ATMOSPHERIC ENVIRONMENT,173,38-45. |
| MLA | Liang, Yong,et al."Size distribution and sorption of polychlorinated biphenyls during haze episodes".ATMOSPHERIC ENVIRONMENT 173(2018):38-45. |
入库方式： OAI收割
来源：生态环境研究中心
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