DOI: 10.1016/j.atmosenv.2015.09.053
Scopus记录号: 2-s2.0-84943170834
论文题名: Chemical composition and acidity of size-fractionated inorganic aerosols of 2013-14 winter haze in Shanghai and associated health risk of toxic elements
作者: Behera S ; N ; , Cheng J ; , Huang X ; , Zhu Q ; , Liu P ; , Balasubramanian R
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 122 起始页码: 259
结束页码: 271
语种: 英语
英文关键词: Aerosol acidity
; Human health risk assessment
; PHIS
; SIA
; Size-fractionated aerosols
; Trace elements
Scopus关键词: Acidity
; Aerosols
; Health
; Health risks
; pH
; Trace elements
; Anthropogenic sources
; Chemical compositions
; Human health risk assessment
; Meteorological condition
; Particulate Matter
; Secondary aerosols
; Secondary inorganic aerosol
; SIA
; Risk assessment
; inorganic compound
; ion
; trace element
; acidity
; aerosol
; anthropogenic source
; chemical composition
; fractionation
; haze
; health risk
; particulate matter
; public health
; risk assessment
; toxic material
; wind velocity
; winter
; acidity
; aerosol
; Article
; carcinogenicity
; chemical composition
; China
; exhaust gas
; haze
; health hazard
; meteorology
; particle size
; particulate matter
; priority journal
; risk assessment
; winter
; China
; Shanghai
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: The severe winter haze episode that occurred in Shanghai from December 2013 to January 2014, characterized by elevated levels of particulate matter (PM), received considerable international attention because of its impacts on public health and disruption of day-to-day activities. To examine the characteristics of PM during this haze episode and to assess the chemistry behind formation of secondary inorganic aerosols (SIA) and associated health impacts due to exposure of toxic elements, we characterized eight water soluble inorganic (WSI) ions and twenty four trace elements in twelve size-fractionated PM (10 nm-9.9 μm). The average mass concentrations of coarse (1.8 μm < Dp < 9.9 μm), fine (Dp < 2.5 μm), ultrafine (0.01 μm < Dp < 0.10 μm) and nano (0.01 μm < Dp < 0.056 μm) particles during hazy days were 2.8, 5.2, 5.3 and 5.1 times higher than those during non-hazy days, respectively. The in-situ pH (pHIS), as predicted by the Aerosol Inorganic Model (AIM-IV) in all sizes of PM, was observed to be lower during hazy days (average of -0.64) than that during non-hazy days (average of -0.29); there was an increased acidity in haze aerosols. Based on the measured concentrations of particulate-bound toxic elements, health risk assessment was conducted, which revealed that the excess lifetime carcinogenic risk to individuals exposed to fine particles under haze events increased significantly (P < 0.05) to 69 ± 18 × 10-6 compared to non-hazy days (34 ± 10 × 10-6). The qualitative source attribution analysis suggested that the occurrence of haze could be due to a combination of increased emissions of PM from multiple anthropogenic sources followed by its accumulation under unfavourable meteorological conditions with lower mixing heights and less wind speeds and the formation of secondary aerosols. © 2015 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/81375
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Civil and Environmental Engineering, National University of Singapore, Singapore; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China
Recommended Citation:
Behera S,N,, Cheng J,et al. Chemical composition and acidity of size-fractionated inorganic aerosols of 2013-14 winter haze in Shanghai and associated health risk of toxic elements[J]. Atmospheric Environment,2015-01-01,122