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DOI	10.5194/acp-21-13269-2021
	Ammonium nitrate promotes sulfate formation through uptake kinetic regime
	Liu Y.; Feng Z.; Zheng F.; Bao X.; Liu P.; Ge Y.; Zhao Y.; Jiang T.; Liao Y.; Zhang Y.; Fan X.; Yan C.; Chu B.; Wang Y.; Du W.; Cai J.; Bianchi F.; Petäjä T.; Mu Y.; He H.; Kulmala M.
发表日期	2021
ISSN	1680-7316
起始页码	13269
结束页码	13286
卷号	21 期号:17
英文摘要	Although the anthropogenic emissions of SO2 have decreased significantly in China, the decrease in SO42- in PM2.5 is much smaller than that of SO2. This implies an enhanced formation rate of SO42- in the ambient air, and the mechanism is still under debate. This work investigated the formation mechanism of particulate sulfate based on statistical analysis of long-term observations in Shijiazhuang and Beijing supported with flow tube experiments. Our main finding was that the sulfur oxidation ratio (SOR) was exponentially correlated with ambient RH in Shijiazhuang (SORĝ€¯Combining double low lineĝ€¯0.15+0.0032×expĝ (RH/16.2)) and Beijing (SORĝ€¯Combining double low lineĝ€¯-0.045+0.12×expĝ (RH/37.8)). In Shijiazhuang, the SOR is linearly correlated with the ratio of aerosol water content (AWC) in PM2.5 (SORĝ€¯Combining double low lineĝ€¯0.15+0.40×AWC/PM2.5). Our results suggest that uptake of SO2 instead of oxidation of S(IV) in the particle phase is the rate-determining step for sulfate formation. NH4NO3 plays an important role in the AWC and the change of particle state, which is a crucial factor determining the uptake kinetics of SO2 and the enhanced SOR during haze days. Our results show that NH3 significantly promoted the uptake of SO2 and subsequently the SOR, while NO2 had little influence on SO2 uptake and SOR in the presence of NH3. © 2021 Copernicus GmbH. All rights reserved.
语种	英语
scopus关键词	air quality; ammonium; atmospheric pollution; flow modeling; nitrate (ester); particulate matter; sulfate
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246601
作者单位	Aerosol and Haze Laboratory, Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China; Hebei Provincial Academy of Environmental Sciences, Shijiazhuang, 050037, China; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Hebei Provincial Meteorological Technical Equipment Center, Shijiazhuang, 050021, China; College of Chemistry and Chemical Engineering, China West Normal University, Nanchong, 637002, China; Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, P.O. Box 6400014, Finland; Hebei Chemical and Pharmaceutical College, Shijiazhuang, 050026, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences (JirLATEST), University of Helsinki, Nanjing University, Nanjing, 210023, China
推荐引用方式 GB/T 7714	Liu Y.,Feng Z.,Zheng F.,et al. Ammonium nitrate promotes sulfate formation through uptake kinetic regime[J],2021,21(17).
APA	Liu Y..,Feng Z..,Zheng F..,Bao X..,Liu P..,...&Kulmala M..(2021).Ammonium nitrate promotes sulfate formation through uptake kinetic regime.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(17).
MLA	Liu Y.,et al."Ammonium nitrate promotes sulfate formation through uptake kinetic regime".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.17(2021).