Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition

doi:10.1016/j.envpol.2018.10.019

IEECAS OpenIR > 粉尘与环境研究室

	Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition
	Wu, Can 1,4; Wang, Gehui 1,2,3,4,5; Cao, Cong 1,4; Li, Jianjun 1; Li, Jin 1,4; Wu, Feng 1; Huang, Rujin 1; Cao, Junji 1; Han, Yongmin 1; Ge, Shuangshuang 2; Xie, Yuning 2; Xue, Guoyan 2; Wang, Xinpei 2
通讯作者	Wang, Gehui(ghwang@geo.ecnu.edu.cn)
	2019
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	0269-7491
卷号	244 页码:877-884
摘要	To identify the sources and heterogeneous reactions of sulfate and nitrate with dust in the atmosphere, airborne particles in Xi'an, inland China during the spring of 2017 were collected and measured for chemical compositions, along with a laboratory simulation of the heterogeneous formation of ammonium nitrate on the dust surface. Our results showed that concentrations of Ca2+, Na+ and Cl- in the TSP samples were enhanced in the dust events, with the values of 41.8, 5.4 and 4.0 mu g m(-3), respectively, while NO3- (7.1 mu g m(-3)) and NH4+ (2.4 mu g m(-3)) remarkably decreased, compared to those in the non-dust periods. During the dust events, NH4+ correlated only with NO3- (R-2 = 0.52) and abundantly occurred in the coarse mode (>2.1 mu m), in contrast to that in the non-dust periods, which well correlated with sulfate and nitrate and enriched in the fine mode (<2.1 mu m). SO42- in Xi'an during the dust events existed mostly as gypsum (CaSO4 center dot 2H(2)O) and mirabilite (Na2SO4 center dot 10H(2)O) and dominated in the coarse mode, suggesting that they were directly transported from the upwind Gobi Desert region. Our laboratory simulation results showed that during the long-range transport hygroscopic salts in the Gobi dust such as mirabilite can absorb water vapor and form a liquid phase on the particle surface, then gaseous NH3 and HNO3 partition into the aqueous phase and form NH4NO3, resulting in the strong correlation of NH4+ with NO3- and their accumulation on dust particles. The dry deposition flux of total inorganic nitrogen (NH4+ + NO3-) in Xi'an during the dust events was 0.97 mg-N m(-2) d(-1) and 37% higher than that in the non-dust periods. Such a significant enhanced N-deposition is ascribed to the heterogeneous formation of NH4NO3 on the dust particle surface, which has been ignored and should be included in future model simulations. (C) 2018 Elsevier Ltd. All rights reserved.
关键词	Asian dust Size distributions Composition Source Nitrogen deposition
DOI	10.1016/j.envpol.2018.10.019
关键词[WOS]	ASIAN DUST ; NITROGEN DEPOSITION ; MINERAL DUST ; DRY DEPOSITION ; ATMOSPHERIC AEROSOLS ; DESERT DUST ; SIZE ; EVENTS ; IMPACT ; CHEMISTRY
收录类别	SCI ; SCI
语种	英语
资助项目	National Key R&D Plan (Quantitative Relationship and Regulation Principle between Regional Oxidation Capacity of Atmospheric and Air Quality)[2017YFC0210000] ; China National Natural Science Funds for Distinguished Young Scholars[41325014] ; National Nature Science Foundation of China[41773117]
WOS研究方向	Environmental Sciences & Ecology
项目资助者	National Key R&D Plan (Quantitative Relationship and Regulation Principle between Regional Oxidation Capacity of Atmospheric and Air Quality) ; China National Natural Science Funds for Distinguished Young Scholars ; National Nature Science Foundation of China
WOS类目	Environmental Sciences
WOS记录号	WOS:000452940700094
出版者	ELSEVIER SCI LTD
引用统计	被引频次：19[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/361006/14509
专题	粉尘与环境研究室
通讯作者	Wang, Gehui
作者单位	1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.East China Normal Univ, Sch Geog Sci, Minist Educ, Key Lab Geog Informat Sci, Shanghai 210062, Peoples R China 3.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China
推荐引用方式 GB/T 7714	Wu, Can,Wang, Gehui,Cao, Cong,et al. Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition[J]. ENVIRONMENTAL POLLUTION,2019,244:877-884.
APA	Wu, Can.,Wang, Gehui.,Cao, Cong.,Li, Jianjun.,Li, Jin.,...&Wang, Xinpei.(2019).Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition.ENVIRONMENTAL POLLUTION,244,877-884.
MLA	Wu, Can,et al."Chemical characteristics of airborne particles in Xi'an, inland China during dust storm episodes: Implications for heterogeneous formation of ammonium nitrate and enhancement of N-deposition".ENVIRONMENTAL POLLUTION 244(2019):877-884.