DOI: 10.1016/j.atmosenv.2014.11.037
Scopus记录号: 2-s2.0-84911902975
论文题名: Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: The important roles of ammonia and ozone
作者: Wen L ; , Chen J ; , Yang L ; , Wang X ; , Xu C ; , Sui X ; , Yao L ; , Zhu Y ; , Zhang J ; , Zhu T ; , Wang W
刊名: Atmospheric Environment
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2015
卷: 101 起始页码: 294
结束页码: 302
语种: 英语
英文关键词: Ammonia
; Fine particulate nitrates
; North China Plain
; Ozone
; Secondary formation
Scopus关键词: Ammonia
; Nitrates
; Ozone
; Pollution control
; Equivalent ratios
; Field measurement
; Fine particulates
; Formation pathways
; North China Plain
; Photochemical activity
; Photochemical pollution
; Secondary formation
; Air pollution
; ammonia
; nitrate
; ozone
; aerosol formation
; ammonia
; atmospheric pollution
; concentration (composition)
; neutralization
; nitrate
; ozone
; particulate matter
; photochemistry
; pollution monitoring
; rural atmosphere
; summer
; air pollution
; Article
; China
; concentration (parameters)
; hydrolysis
; particulate matter
; photochemistry
; rural area
; summer
; China
; North China Plain
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: Severe PM2.5 pollution was observed frequently on the North China Plain, and nitrate contributed a large fraction of the elevated PM2.5 concentrations. To obtain a comprehensive understanding of the formation pathways of these fine particulate nitrate and the key factors that affect these pathways, field measurements of fine particulate nitrate and related air pollutants were made at a rural site on the North China Plain in the summer of 2013. Extremely high concentrations of fine particulate nitrate were frequently observed at night and in the early morning. The maximum hourly concentration of fine particulate nitrate reached 87.2μgm-3. This concentration accounted for 29.9% of the PM2.5. The very high NH3 concentration in the early morning significantly accelerated the formation of fine particulate nitrate, as indicated by the concurrent appearance of NH3 and NO3- concentration peaks and a rising neutralization ratio (the equivalent ratio of NH4+ to the sum of SO42- and NO3-). On a number of other episode days, strong photochemical activity during daytime led to high concentrations of O3 at night. The fast secondary formation of fine particulate nitrate was mainly attributed to the hydrolysis of N2O5, which was produced from O3 and NO2. Considering the important roles of NH3 and O3 in fine particulate nitrate formation, we suggest the control of NH3 emissions and photochemical pollution to address the high levels of fine particulate nitrate and the severe PM2.5 pollution on the North China Plain. © 2014 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/82145
Appears in Collections: 气候变化事实与影响
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作者单位: Environment Research Institute, Shandong University, Jinan, China; School of Environmental Science and Engineering, Shandong University, Jinan, China; Shanghai Key Lab. of Atm. Particle Pollution and Prevention (LAP3), Fudan Tyndall Centre, Department of Environmental Science and Engineering, Fudan University, Shanghai, China; State Key Lab for Environment Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China
Recommended Citation:
Wen L,, Chen J,, Yang L,et al. Enhanced formation of fine particulate nitrate at a rural site on the North China Plain in summer: The important roles of ammonia and ozone[J]. Atmospheric Environment,2015-01-01,101