气候变化领域集成服务门户(CCPortal): Fast oxidation of sulfur dioxide by hydrogen peroxide in deliquesced aerosol particles

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DOI	10.1073/pnas.1916401117
	Fast oxidation of sulfur dioxide by hydrogen peroxide in deliquesced aerosol particles
	Liu T.; Clegg S.L.; Abbatt J.P.D.
发表日期	2020
ISSN	0027-8424
起始页码	1354
结束页码	1359
卷号	117 期号:3
英文摘要	Atmospheric sulfate aerosols have important impacts on air quality, climate, and human and ecosystem health. However, current airquality models generally underestimate the rate of conversion of sulfur dioxide (SO2) to sulfate during severe haze pollution events, indicating that our understanding of sulfate formation chemistry is incomplete. This may arise because the air-quality models rely upon kinetics studies of SO2 oxidation conducted in dilute aqueous solutions, and not at the high solute strengths of atmospheric aerosol particles. Here, we utilize an aerosol flow reactor to perform direct investigation on the kinetics of aqueous oxidation of dissolved SO2 by hydrogen peroxide (H2O2) using pH-buffered, submicrometer, deliquesced aerosol particles at relative humidity of 73 to 90%. We find that the high solute strength of the aerosol particles significantly enhances the sulfate formation rate for the H2O2 oxidation pathway compared to the dilute solution. By taking these effects into account, our results indicate that the oxidation of SO2 by H2O2 in the liquid water present in atmospheric aerosol particles can contribute to the missing sulfate source during severe haze episodes. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Aerosol kinetics; air pollution; Chinese haze; Multiphase chemistry; Sulfate aerosol
语种	英语
scopus关键词	hydrogen peroxide; sulfate; sulfur dioxide; air quality; aqueous solution; Article; flow kinetics; haze; humidity; oxidation; particulate matter; pH; priority journal; solute
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161086
作者单位	Liu, T., Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada; Clegg, S.L., School of Environmental Sciences, University of East Anglia, Norwich, NR4 7TJ, United Kingdom; Abbatt, J.P.D., Department of Chemistry, University of Toronto, Toronto, ON M5S 3H6, Canada
推荐引用方式 GB/T 7714	Liu T.,Clegg S.L.,Abbatt J.P.D.. Fast oxidation of sulfur dioxide by hydrogen peroxide in deliquesced aerosol particles[J],2020,117(3).
APA	Liu T.,Clegg S.L.,&Abbatt J.P.D..(2020).Fast oxidation of sulfur dioxide by hydrogen peroxide in deliquesced aerosol particles.Proceedings of the National Academy of Sciences of the United States of America,117(3).
MLA	Liu T.,et al."Fast oxidation of sulfur dioxide by hydrogen peroxide in deliquesced aerosol particles".Proceedings of the National Academy of Sciences of the United States of America 117.3(2020).