Non-agricultural sources dominate the atmospheric NH3 in Xi'an, a megacity in the semi-arid region of China

doi:10.1016/j.scitotenv.2020.137756

IEECAS OpenIR > 粉尘与环境研究室

	Non-agricultural sources dominate the atmospheric NH3 in Xi'an, a megacity in the semi-arid region of China
	Wu, Can 1,2; Wang, Gehui 1,2,3; Li, Jin 1; Li, Jianjun 1; Cao, Cong 2,6; Ge, Shuangshuang 1; Xie, Yuning 1; Chen, Jianmin 3,4; Liu, Shijie 1; Du, Wei 1; Zhao, Zhuyu 5; Cao, Fang 5
通讯作者	Wang, Gehui(ghwang@geo.ecnu.edu.cn)
	2020-06-20
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	722 页码:9
摘要	Ammonia (NH3), as a dominant alkaline gas in the atmosphere, plays a vital role in Chinese urban haze formation process, but its source in urban areas of China is controversial. To identify the sources of urban NH3 in the semiarid region of East Asia, real-time measurements of NH3 and NH4+ of PM2.5 in the urban atmosphere of Xi'an, inland China during the winter and summer of 2017 were performed and their stable nitrogen isotope composition were analyzed. NH3 was 38.0 +/- 9.4 mu g/m(3) in the summer, which is 1.5 times higher than that in the winter. Concentration of NH3 in both seasons well correlated with that of PAHs in PM2.5 and the mass ratio of (BbF + BeP + IP + BghiP) to the total PAHs, suggesting that fossil fuel combustion is an important source of NH3 in Xi'an. Moreover, diurnal variation pattern of NH3 was consistent with that of CO in the summer, peaking in the morning and evening rush hours, respectively, further indicating an importance of the contribution of traffic emissions to NH3 in the city. Based on the source apportionment by using isotope mixing model, we found that 66.4% and 62.5% of NH3 in the urban atmosphere were contributed by non-agricultural sources in the summer and winter, respectively. Our work revealed that non-agricultural sources dominate the atmospheric NH3 of Xi'an, where haze pollution is still severe, and suggested that emission controls of non-agricultural NH3 could be an effective way to mitigate the air pollution problem in the semi-arid region of East Asia. (C) 2020 Elsevier B.V. All rights reserved.
关键词	PM2.5 Biomarker Diurnal variation Stable nitrogen isotope composition Source apportionment
DOI	10.1016/j.scitotenv.2020.137756
关键词[WOS]	AMMONIA EMISSIONS ; AMBIENT AMMONIA ; UNITED-STATES ; ISOTOPIC COMPOSITION ; VEHICLE EMISSIONS ; ORGANIC AEROSOLS ; RURAL SITE ; URBAN ; NITROGEN ; DEPOSITION
收录类别	SCI ; SCI
语种	英语
资助项目	National Key Research and Development Program (Mechanismand chemical process characterization of atmospheric particulatematter multi-isotope fractionation)[2017YFC0212703] ; National Natural Science Foundation of China[41773117]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Key Research and Development Program (Mechanismand chemical process characterization of atmospheric particulatematter multi-isotope fractionation) ; National Natural Science Foundation of China
WOS类目	Environmental Sciences
WOS记录号	WOS:000535471400011
出版者	ELSEVIER
引用统计	被引频次：48[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14822
专题	粉尘与环境研究室
通讯作者	Wang, Gehui
作者单位	1.East China Normal Univ, Minist Educ, Key Lab Geog Informat Sci, Sch Geog Sci, Shanghai 210062, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 3.Inst Ecochong, 3663 North Zhongshan Rd, Shanghai 200062, Peoples R China 4.Fudan Univ, Dept Environm Sci & Technol, Shanghai 200433, Peoples R China 5.Nanjing Univ Informat Sci & Technol, Yale NUIST Ctr Atmospher Environm, Nanjing 210044, Peoples R China 6.SUNY Stony Brook, Stony Brook, NY 11794 USA
推荐引用方式 GB/T 7714	Wu, Can,Wang, Gehui,Li, Jin,et al. Non-agricultural sources dominate the atmospheric NH3 in Xi'an, a megacity in the semi-arid region of China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,722:9.
APA	Wu, Can.,Wang, Gehui.,Li, Jin.,Li, Jianjun.,Cao, Cong.,...&Cao, Fang.(2020).Non-agricultural sources dominate the atmospheric NH3 in Xi'an, a megacity in the semi-arid region of China.SCIENCE OF THE TOTAL ENVIRONMENT,722,9.
MLA	Wu, Can,et al."Non-agricultural sources dominate the atmospheric NH3 in Xi'an, a megacity in the semi-arid region of China".SCIENCE OF THE TOTAL ENVIRONMENT 722(2020):9.