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Chemical Composition and Light Extinction Contribution of PM2.5 in Urban Beijing for a 1-Year Period

文献类型：期刊论文

作者Wang, Huanbo1; Tian, Mi1; Li, Xinghua2; Chang, Qing2; Cao, Junji3; Yang, Fumo1; Ma, Yongliang4; He, Kebin4
刊名AEROSOL AND AIR QUALITY RESEARCH
出版日期2015-11-01
卷号15期号:6页码:2200-2211
ISSN号1680-8584
关键词Chemical composition Reconstructed light extinction coefficient Visibility PM2.5
DOI10.4209/aaqr.2015.04.0257
通讯作者Li, XH (reprint author), Beihang Univ, Sch Chem & Environm, Beijing 100191, Peoples R China.
英文摘要Daily PM2.5 samples were collected in Beijing across four consecutive seasons from June 2012 to April 2013. Major water-soluble inorganic ions, carbonaceous species and elements were analyzed to investigate their temporal variations and evaluate their contributions to visibility impairment over different seasons and under different pollution levels. The mass concentrations of PM2.5 ranged from 4.3 to 592.4 mu g m(-3), with an annual average of 112.4 +/- 94.4 mu g m(-3). The predominant components of PM2.5 were secondary inorganic ions (NH4+, NO3- and SO42-) and carbonaceous compounds, which accounted for 45.9% and 24.1% of the total PM2.5 mass, respectively. Distinct seasonal variation was observed in the mass concentrations and chemical components of PM2.5. The average mass concentrations of PM2.5 were the highest in winter, followed by spring, and lowest in autumn. Light extinction coefficients (b(ext)) were discussed over four seasons. (NH4)(2)SO4 was the largest contributor (28.8%) to bext, followed by NH4NO3 (24.4%), organic matter (19.5%), elemental carbon (7.4%), and coarse mass (7.2%), while fine soil, sea salt, NO2 and Rayleigh made minor contributions, together accounting for 12.7% of b(ext). During the polluted periods, the contributions of (NH4)(2)SO4 and NH4NO3 to bext increased dramatically. Therefore, in addition to control primary particulate emissions, the reduction of their precursors like SO2, NOx and NH3 could effectively improve air quality and visibility in Beijing.
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资助项目National Natural Science Foundation of China[41075093] ; National Natural Science Foundation of China[41275121] ; National Natural Science Foundation of China[41375123] ; "Strategic Priority Research Program" of the Chinese Academy of Sciences[KJZD-EW -TZ-G06-04] ; Major Program for the Fundamental Research of the Ministry of Science and Technology of China[2013FY112700] ; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex[SCAPC201310] ; Ministry of Environmental Protection of China[201209007] ; Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control of Nanjing University of Information Science and Technology ; Jiangsu Province Innovation Platform for Superiority Subject of Environmental Science and Engineering[KHK1201]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者TAIWAN ASSOC AEROSOL RES-TAAR
WOS记录号WOS:000363396200003
源URL[http://119.78.100.138/handle/2HOD01W0/1957]  
专题大气环境研究中心
通讯作者Li, Xinghua
作者单位1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Key Lab Reservoir Aquat Environm, Chongqing 400714, Peoples R China
2.Beihang Univ, Sch Chem & Environm, Beijing 100191, Peoples R China
3.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, Xian 710075, Peoples R China
4.Tsinghua Univ, Sch Environm, State Environm Protect Key Lab Sources & Control, Beijing 100084, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Huanbo,Tian, Mi,Li, Xinghua,et al. Chemical Composition and Light Extinction Contribution of PM2.5 in Urban Beijing for a 1-Year Period[J]. AEROSOL AND AIR QUALITY RESEARCH,2015,15(6):2200-2211.
APA Wang, Huanbo.,Tian, Mi.,Li, Xinghua.,Chang, Qing.,Cao, Junji.,...&He, Kebin.(2015).Chemical Composition and Light Extinction Contribution of PM2.5 in Urban Beijing for a 1-Year Period.AEROSOL AND AIR QUALITY RESEARCH,15(6),2200-2211.
MLA Wang, Huanbo,et al."Chemical Composition and Light Extinction Contribution of PM2.5 in Urban Beijing for a 1-Year Period".AEROSOL AND AIR QUALITY RESEARCH 15.6(2015):2200-2211.

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来源：重庆绿色智能技术研究院

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