气候变化领域集成服务门户(CCPortal): Oxidation of Proteinaceous Matter by Ozone and Nitrogen Dioxide in PM2.5: Reaction Mechanisms and Atmospheric Implications

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DOI	10.1029/2021JD034741
	Oxidation of Proteinaceous Matter by Ozone and Nitrogen Dioxide in PM2.5: Reaction Mechanisms and Atmospheric Implications
	Zhu R.-G.; Xiao H.-Y.; Wen Z.; Zhu Y.; Fang X.; Pan Y.; Chen Z.; Xiao H.
发表日期	2021
ISSN	2169-897X
卷号	126 期号:16
英文摘要	Interactions between proteinaceous matter and atmospheric oxidants can affect amino acids (AAs) bioavailability, the climate, and human health. However, atmospheric reactions of proteinaceous matter remain poorly understood. PM2.5 samples were collected during spring (2019) and winter (2020) sampling campaigns conducted in Nanchang, China. Concentrations of combined and free AAs, and the δ15N values of combined and free glycine (C-Gly and F-Gly) in PM2.5 samples were analyzed. Concentrations of TFAA under different O3 and NO2 levels, and correlations of specific FAA species with ambient O3 and NO2 concentrations suggest that the ability of O3 to release TFAA from proteinaceous matter is greater than that of NO2. Furthermore, O3 may trend to release neutral and hydrophilic FAA species, whereas NO2 tends to generate hydrophobic FAA species. With aerosol aging, the slope of the fitted line between [TFAA] and [TSAA] [O3 + NO2] increased, indicating that FAAs yield from protein degradation in PM2.5 was affected greatly by aerosol aging. The TCAAs concentration observed in spring was substantially higher than that in winter. Moreover, the δ15NF-Gly and δ15NC-Gly values in PM2.5 exhibited negative correlations with atmospheric O3 concentration. These results suggest that increased levels of proteinaceous matter in spring were derived from natural sources related to biological activities rather than biomass burning sources. Our study confirms that the reaction of degradation of proteinaceous matter to FAAs could be influenced by aerosol aging, which is a finding that enhances current understanding regarding atmospheric processes of aerosol proteinaceous matter under different ambient O3 and NO2 levels. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	combined amino acid; free amino acid; glycine; nitrogen dioxide; nitrogen isotope; ozone
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/237059
作者单位	Jiangxi Province Key Laboratory of the Causes and Control of Atmospheric Pollution, East China University of Technology, Nanchang, China; School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, China; Department of Earth Sciences, Faculty of Land Resource Engineering, Kunming University of Science and Technology, Kunming, China; School of Earth Sciences, East China University of Technology, Nanchang, China
推荐引用方式 GB/T 7714	Zhu R.-G.,Xiao H.-Y.,Wen Z.,et al. Oxidation of Proteinaceous Matter by Ozone and Nitrogen Dioxide in PM2.5: Reaction Mechanisms and Atmospheric Implications[J],2021,126(16).
APA	Zhu R.-G..,Xiao H.-Y..,Wen Z..,Zhu Y..,Fang X..,...&Xiao H..(2021).Oxidation of Proteinaceous Matter by Ozone and Nitrogen Dioxide in PM2.5: Reaction Mechanisms and Atmospheric Implications.Journal of Geophysical Research: Atmospheres,126(16).
MLA	Zhu R.-G.,et al."Oxidation of Proteinaceous Matter by Ozone and Nitrogen Dioxide in PM2.5: Reaction Mechanisms and Atmospheric Implications".Journal of Geophysical Research: Atmospheres 126.16(2021).