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DOI	10.5194/acp-21-11437-2021
	Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: Detection, source identification and potential atmospheric impacts
	Fan X.; Cai J.; Yan C.; Zhao J.; Guo Y.; Li C.; Dällenbach K.R.; Zheng F.; Lin Z.; Chu B.; Wang Y.; Dada L.; Zha Q.; Du W.; Kontkanen J.; Kurtén T.; Iyer S.; Kujansuu J.T.; Petäjä T.; Worsnop D.R.; Kerminen V.-M.; Liu Y.; Bianchi F.; Tham Y.J.; Yao L.; Kulmala M.
发表日期	2021
ISSN	1680-7316
起始页码	11437
结束页码	11452
卷号	21 期号:14
英文摘要	Gaseous hydrochloric (HCl) and hydrobromic acid (HBr) are vital halogen species that play essential roles in tropospheric physicochemical processes. Yet, the majority of the current studies on these halogen species were conducted in marine or coastal areas. Detection and source identification of HCl and HBr in inland urban areas remain scarce, thus limiting the full understanding of halogen chemistry and potential atmospheric impacts in the environments with limited influence from the marine sources. Here, both gaseous HCl and HBr were concurrently measured in urban Beijing, China, during winter and early spring of 2019. We observed significant HCl and HBr concentrations ranging from a minimum value at 1gg108 molecules cm-3 (4gppt) and 4gg107 molecules cm-3 (1gppt) up to 6gg109 molecules cm-3 (222gppt) and 1gg109 molecules cm-3 (37gppt), respectively. The HCl and HBr concentrations are enhanced along with the increase of atmospheric temperature, UVB and levels of gaseous HNO3. Based on the air mass analysis and high correlations of HCl and HBr with the burning indicators (HCN and HCNO), gaseous HCl and HBr are found to be related to anthropogenic burning aerosols. The gas-particle partitioning may also play a dominant role in the elevated daytime HCl and HBr. During the daytime, the reactions of HCl and HBr with OH radicals lead to significant production of atomic Cl and Br, up to 2gg104 molecules cm-3gs-1 and 8gg104 moleculesgcm-3gs-1, respectively. The production rate of atomic Br (via HBrg+gOH) is 2-3 times higher than that of atomic Cl (via HClg+gOH), highlighting the potential importance of bromine chemistry in the urban area. On polluted days, the production rates of atomic Cl and Br are faster than those on clean days. Furthermore, our observations of elevated HCl and HBr may suggest an important recycling pathway of halogen species in inland megacities and may provide a plausible explanation for the widespread halogen chemistry, which could affect the atmospheric oxidation in China. © 2021 Atmospheric Chemistry and Physics. All rights reserved.
语种	英语
scopus关键词	atmospheric chemistry; concentration (composition); detection method; hydrochloric acid; hydroxyl radical; source apportionment; urban area; Beijing [China]; China
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/246695
作者单位	Aerosol and Haze Laboratory, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology, Beijing, 100089, China; Institute for Atmospheric and Earth System Research (Physics), Faculty of Science, University of Helsinki, Helsinki, 00560, Finland; State Key Joint Laboratory of Environment Simulation and Pollution Control, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, 361021, China; Department of Chemistry, University of Helsinki, Helsinki, 00014, Finland; Aerosol Physics Laboratory, Physics Unit, Tampere University, Tampere, 33100, Finland; Aerodyne Research Inc., Billerica, MA 01821, United States; School of Marine Sciences, Sun Yat-Sen University, Zhuhai, 519082, China; Joint International Research Laboratory of Atmospheric and Earth System Sciences (JirLATEST), Nanj...
推荐引用方式 GB/T 7714	Fan X.,Cai J.,Yan C.,et al. Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: Detection, source identification and potential atmospheric impacts[J],2021,21(14).
APA	Fan X..,Cai J..,Yan C..,Zhao J..,Guo Y..,...&Kulmala M..(2021).Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: Detection, source identification and potential atmospheric impacts.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(14).
MLA	Fan X.,et al."Atmospheric gaseous hydrochloric and hydrobromic acid in urban Beijing, China: Detection, source identification and potential atmospheric impacts".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.14(2021).