DOI: 10.1016/j.atmosenv.2017.11.007
Scopus记录号: 2-s2.0-85032919590
论文题名: Size distribution and sorption of polychlorinated biphenyls during haze episodes
作者: Zhu Q ; , Liu G ; , Zheng M ; , Zhang X ; , Gao L ; , Su G ; , Liang Y
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
卷: 173 起始页码: 38
结束页码: 45
语种: 英语
英文关键词: Atmosphere
; Haze
; Particle size distribution
; Polychlorinated biphenyls
; Sorption mechanism
Scopus关键词: Aerosols
; Earth atmosphere
; Electric circuit breakers
; Gases
; Organic pollutants
; Particle size
; Particle size analysis
; Size distribution
; Sorption
; Aerosol particles
; Fine particle fractions
; Gas-particle partitioning
; Haze
; Particle fraction
; Particulate fraction
; Polychlorinated biphenyl (PCBs)
; Sorption mechanism
; Polychlorinated biphenyls
; polychlorinated biphenyl
; aerosol
; atmospheric pollution
; concentration (composition)
; haze
; particle size
; partitioning
; PCB
; size distribution
; sorption
; trend analysis
; adsorption
; airborne particle
; Article
; atmosphere
; China
; exposure
; gas
; haze
; human
; meteorology
; particle size
; particulate matter
; priority journal
; risk assessment
; Beijing [China]
; China
Scopus学科分类: Environmental Science: Water Science and Technology
; Earth and Planetary Sciences: Earth-Surface Processes
; Environmental Science: Environmental Chemistry
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 ∑PCBs in particulate fractions were 11.9–134 pg/m3 and 6.37–14.9 pg/m3 during haze days and normal days, respectively. PCBs increased with decreasing particle size (>10 μm, 10–2.5 μm, 2.5–1.0 μm, and ≤1.0 μm). During haze days, PCBs were overwhelmingly associated with a fine particle fraction of ≤1.0 μm (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 μm. Adsorption might be the predominating mechanism for the gas-particle partitioning of PCBs during haze days, whereas absorption might be dominative during normal days. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83121
Appears in Collections: 气候变化事实与影响
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作者单位: State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Institute of Environment and Health, Jianghan University, Wuhan, China
Recommended Citation:
Zhu Q,, Liu G,, Zheng M,et al. Size distribution and sorption of polychlorinated biphenyls during haze episodes[J]. Atmospheric Environment,2018-01-01,173