Effects of Aerosol Water Content on the formation of secondary inorganic aerosol during a Winter Heavy PM2.5 Pollution Episode in Xi'an, China

doi:10.1016/j.atmosenv.2021.118304

IEECAS OpenIR > 粉尘与环境研究室

	Effects of Aerosol Water Content on the formation of secondary inorganic aerosol during a Winter Heavy PM2.5 Pollution Episode in Xi'an, China
	Zhang, T.1,2; Shen, Z. X.3; Su, H.2,4; Liu, S. X.1,2; Zhou, J. M.1,2; Zhao, Z. Z.5; Wang, Q. Y.1,2; Prevot, A. S. H.6; Cao, J. J.1,2,3
通讯作者	Zhang, T.(zhangting@ieecas.cn) ; Cao, J. J.(cao@loess.llqg.ac.cn)
	2021-05-01
发表期刊	ATMOSPHERIC ENVIRONMENT
ISSN	1352-2310
卷号	252 页码:11
摘要	Sulfate, nitrate and ammonium are the most abundant secondary inorganic aerosols (SIA) in atmospheric fine particle matter (PM2.5). Meteorological conditions, gas-particle transportation process, and aerosol acidity (pH) can influence SIA formation. In this study, we conducted semi-continuous measurements of water-soluble inorganic ions during a winter extreme pollution event (from January 9th to January 17th, 2015, average PM2.5 concentrations of similar to 250 mu g m(-3) and peak concentrations of similar to 700 mu g m(-3)) in Xi'an to elucidate on the SIA formation mechanism. The hourly mean level of the total water-soluble ion was 137.4 mu g m(-3), accounting for 55.3% of PM2.5 on average. The dominant ions concentrations of SO42-, NO3- and NH4+ accounted for 15.8%, 19.0% and 13.2% of PM2.5 mass, respectively. PM2.5 was moderately acidic, with an average pH of 4.8 +/- 0.4. Compared to the clean periods, sulfate content decreased by 6.9% during the polluted periods, while those of nitrate and ammonium increased by 2.2% and 5.0%, respectively. The increase in nitrogen oxidation ratios (NOR) and ammonia conversion ratio (NHR) from normal days to haze days were greater when comparison to sulfur oxidation ratios (SOR). In the polluted periods, sulfate and nitrate formations were facilitated by water content increase. Strong linear correlation coefficients between SOR (R-2 = 0.81) and NOR (R-2 = 0.55) with aerosol water content indicated that the gas-liquid reaction of SO2 and NO2 is the major pathway of sulfate and nitrate formation during severe haze episodes. In contrast, the NHR and aerosol water content exhibited a logarithmic relationship, which reveals that when water content was greater than 100 mu g m(-3), the gas-particle partitioning ratio of ammonium was basically unchanged following an increase in water content.
关键词	Water-soluble ions Aerosol water content Sulfate Nitrate Ammonia
DOI	10.1016/j.atmosenv.2021.118304
关键词[WOS]	FINE PARTICULATE MATTER ; CHEMICAL-COMPOSITION ; SEASONAL-VARIATIONS ; HAZE EVENTS ; ATMOSPHERIC AMMONIA ; NITRATE FORMATION ; GUANZHONG PLAIN ; NORTHERN CHINA ; ION CHEMISTRY ; TAIPEI BASIN
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41503123] ; National Natural Science Foundation of China[21661132005] ; National Atmospheric Research Program[2017YFC0212200] ; Key Projects of CAS[ZDRWZS-2017-6] ; National Research Program for Key Issues in Air Pollution Control[DQGG0105] ; Key Research and Development Program of Shaanxi Province[2018-ZDXM3-01] ; SINOSWISS project[IZLCZ2-169986]
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
项目资助者	National Natural Science Foundation of China ; National Atmospheric Research Program ; Key Projects of CAS ; National Research Program for Key Issues in Air Pollution Control ; Key Research and Development Program of Shaanxi Province ; SINOSWISS project
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000640897900004
出版者	PERGAMON-ELSEVIER SCIENCE LTD
引用统计	被引频次：34[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/361006/16401
专题	粉尘与环境研究室
通讯作者	Zhang, T.; Cao, J. J.
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol SKLLQG, Xian 710061, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys KLACP, Xian 710061, Peoples R China 3.Xi An Jiao Tong Univ, Dept Environm Engn, Xian 710049, Peoples R China 4.Xian Inst Innovat Earth Environm Res, Xian 710061, Peoples R China 5.Jiangsu Univ Technol, Sch Chem & Environm Engn, Changzhou 213001, Peoples R China 6.Paul Scherrer Inst, Lab Atmospher Chem, Forschungsstr 111, CH-5232 Villigen, Switzerland
推荐引用方式 GB/T 7714	Zhang, T.,Shen, Z. X.,Su, H.,et al. Effects of Aerosol Water Content on the formation of secondary inorganic aerosol during a Winter Heavy PM2.5 Pollution Episode in Xi'an, China[J]. ATMOSPHERIC ENVIRONMENT,2021,252:11.
APA	Zhang, T..,Shen, Z. X..,Su, H..,Liu, S. X..,Zhou, J. M..,...&Cao, J. J..(2021).Effects of Aerosol Water Content on the formation of secondary inorganic aerosol during a Winter Heavy PM2.5 Pollution Episode in Xi'an, China.ATMOSPHERIC ENVIRONMENT,252,11.
MLA	Zhang, T.,et al."Effects of Aerosol Water Content on the formation of secondary inorganic aerosol during a Winter Heavy PM2.5 Pollution Episode in Xi'an, China".ATMOSPHERIC ENVIRONMENT 252(2021):11.