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Changes in concentration, composition and source contribution of atmospheric organic aerosols by shifting coal to natural gas in Urumqi
Ren, Yanqin1,3; Wang, Gehui1,2,4; Wu, Can1,3; Wang, Jiayuan1,3; Li, Jianjun1; Zhang, Lu1,3; Han, Yanni1,3; Liu, Lang1,3; Cao, Cong1,3; Cao, Junji1; He, Qing5; Liu, Xinchun5
2017
发表期刊ATMOSPHERIC ENVIRONMENT
卷号148期号:2017页码:306-315
文章类型Article
摘要Size-segregated aerosols were collected in Urumqi, a megacity in northwest China, during two heating seasons, i.e., before (heating season I: January March 2012) and after (heating season II: January March 2014) the project "shifting coal to natural gas", and determined for n-alkanes, PAHs and oxygenated PAHs to investigate the impact of replacement of coal by natural gas on organic aerosols in the urban atmosphere. Our results showed that compared to those in heating season I concentrations of n-alkanes, PAHs and OPAHs decreased by 74%, 74% and 82% in heating season II, respectively. Source apportionment analysis suggested that coal combustion, traffic emission and biomass burning are the major sources of the determined organics during the heating seasons in Urumqi. Traffic emission is the main source for n-alkanes in the city. Coal combustion is the dominant source of PAHs and OPAHs in heating season I, but traffic emission becomes their major source in heating season II. Relative contributions of coal combustion to n-alkanes, PAHs and OPAHs in Urumqi decreased from 21 to 75% in heating season I to 4.0 -21% in heating season II due to the replacement of coal with natural gas for house heating. Health risk assessment further indicated that compared with that in heating season I the number of lung cancer related to PAHs exposure in Urumqi decreased by 73% during heating season II due to the project implementation. Our results suggest that replacing coal by clean energy sources for house heating will significantly mitigate air pollution and improve human health in China. (C) 2016 Elsevier Ltd. All rights reserved.
关键词N-alkanes Pahs Oxygenated Pahs Molecular Compositions Source Apportionment Health Risk Assessment
WOS标题词Science & Technology ; Life Sciences & Biomedicine ; Physical Sciences
DOI10.1016/j.atmosenv.2016.10.053
关键词[WOS]POLYCYCLIC AROMATIC-HYDROCARBONS ; POSITIVE MATRIX FACTORIZATION ; LUNG-CANCER RISK ; SEASONAL-VARIATION ; SIZE-DISTRIBUTION ; OXYGENATED PAHS ; INHALATION EXPOSURE ; NORTH CHINA ; N-ALKANES ; URBAN
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号WOS:000389394900028
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/5564
专题粉尘与环境研究室
作者单位1.Chinese Acad Sci, State Key Lab Loess & Quaternary Geol, Key Lab Aerosol Chem & Phys, Inst Earth Environm, Xian 710061, Peoples R China
2.Chinese Acad Sci, Inst Urban Environm, CAS Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710079, Peoples R China
5.China Meteorol Adm, Inst Desert Meteorol, Urumqi 830002, Peoples R China
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Ren, Yanqin,Wang, Gehui,Wu, Can,et al. Changes in concentration, composition and source contribution of atmospheric organic aerosols by shifting coal to natural gas in Urumqi[J]. ATMOSPHERIC ENVIRONMENT,2017,148(2017):306-315.
APA Ren, Yanqin.,Wang, Gehui.,Wu, Can.,Wang, Jiayuan.,Li, Jianjun.,...&Liu, Xinchun.(2017).Changes in concentration, composition and source contribution of atmospheric organic aerosols by shifting coal to natural gas in Urumqi.ATMOSPHERIC ENVIRONMENT,148(2017),306-315.
MLA Ren, Yanqin,et al."Changes in concentration, composition and source contribution of atmospheric organic aerosols by shifting coal to natural gas in Urumqi".ATMOSPHERIC ENVIRONMENT 148.2017(2017):306-315.
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