气候变化领域集成服务门户(CCPortal): Triplet-state organic matter in atmospheric aerosols: Formation characteristics and potential effects on aerosol aging

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DOI	10.1016/j.atmosenv.2021.118343
	Triplet-state organic matter in atmospheric aerosols: Formation characteristics and potential effects on aerosol aging
	Chen Q.; Mu Z.; Xu L.; Wang M.; Wang J.; Shan M.; Fan X.; Song J.; Wang Y.; Lin P.; Du L.
发表日期	2021
ISSN	1352-2310
卷号	252
英文摘要	Triplet-state organic matter could be generated by chromophoric organic aerosols under light exposure, which furtherly induce aerosol aging. The characteristics of triplet-state generation have not been fully investigated to date in organic aerosols. Here, we conduct a comprehensive investigation of the generation characteristics of triplet-state chromophoric dissolved organic matter (3CDOM) in primary, secondary and ambient aerosols. The results show that biomass combustion have the strongest capacity of 3CDOM generation, while vehicle emissions are the weakest. In ambient aerosol, there is a stronger ability to generate 3CDOM* in winter than in summer. The various types of CDOM are identified by the EEM-PARAFAC method, and the structure-activity relationship between the type of CDOM and the capacity of 3CDOM* generation is investigated. The results show that two types of CDOM, which are usually identified as N-containing substances, contributed 88% to triplet-state generation. According to the spin trapping and electron paramagnetic resonance technique, we estimate that 3CDOM* induce at least 30% of the singlet oxygen (1O2) and 31% of the hydroxyl radical (•OH) in aerosols. The estimated generation rate of 3CDOM* reached ~100 μmol m−3 h−1 in the atmosphere in Xi'an, China, which is approximately one hundred thousand times that of •OH. These results indicate that 3CDOM* is likely a significant contributor to aerosol aging in the actual atmosphere. © 2021 Elsevier Ltd
关键词	Aerosol photochemistry Atmospheric chromophores Excitation-emission matrix Structure-activity relationship Triplet states organic matter
语种	英语
scopus关键词	Atmospheric aerosols; Atmospheric thermodynamics; Biogeochemistry; Combustion; Paramagnetic resonance; Photochemical reactions; Aerosol aging; Aerosol photochemistry; Atmospheric chromophore; Excitation emission matrices; Organic aerosol; Organics; State generations; Structure-activity relationships; Triplet state; Triplet state organic matter; Chromophores; dissolved organic matter; hydroxyl radical; organic matter; reactive oxygen metabolite; singlet oxygen; aerosol; combustion; concentration (composition); dissolved organic matter; electron spin resonance; hydroxyl radical; numerical model; winter; aerosol; aging; air pollution; Article; atmosphere; biomass; chemical reaction kinetics; chemical structure; China; combustion; electron spin resonance; fluorescence intensity; light exposure; particulate matter; photochemistry; priority journal; seasonal variation; spin trapping; structure activity relation; China; Shaanxi; Xian
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248506
作者单位	School of Environmental Science and Engineering, Shaanxi University of Science and Technology, Xi'an, 710021, China; Environment Research Institute, Shandong University, Qingdao, 266237, China; School of Civil Engineering, Beijing Jiaotong University, Beijing, 100044, China; Department of Building Science, School of Architecture, Tsinghua University, Beijing, 100084, China; College of Resource and Environment, Anhui Science and Technology UniversityAnhui 233100, China; State Key Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, 510640, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, 100190, China
推荐引用方式 GB/T 7714	Chen Q.,Mu Z.,Xu L.,et al. Triplet-state organic matter in atmospheric aerosols: Formation characteristics and potential effects on aerosol aging[J],2021,252.
APA	Chen Q..,Mu Z..,Xu L..,Wang M..,Wang J..,...&Du L..(2021).Triplet-state organic matter in atmospheric aerosols: Formation characteristics and potential effects on aerosol aging.ATMOSPHERIC ENVIRONMENT,252.
MLA	Chen Q.,et al."Triplet-state organic matter in atmospheric aerosols: Formation characteristics and potential effects on aerosol aging".ATMOSPHERIC ENVIRONMENT 252(2021).