气候变化领域集成服务门户(CCPortal): Particle-phase processing of alpha-pinene NO3 secondary organic aerosol in the dark

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DOI	10.5194/acp-22-13167-2022
	Particle-phase processing of alpha-pinene NO3 secondary organic aerosol in the dark
	Bell, David M.; Wu, Cheng; Bertrand, Amelie; Graham, Emelie; Schoonbaert, Janne; Giannoukos, Stamatios; Baltensperger, Urs; Prevot, Andre S. H.; Riipinen, Ilona; El Haddad, Imad; Mohr, Claudia
发表日期	2022
ISSN	1680-7316
EISSN	1680-7324
起始页码	13167
结束页码	13182
卷号	22 期号:19 页码:16
英文摘要	The NO3 radical represents a significant nighttime oxidant which is present downstream of polluted environments. Existing studies have investigated the formation of secondary organic aerosol (SOA) from NO3 radicals, focusing on the yields, general composition, and hydrolysis of organonitrates; however, there is limited knowledge about how the composition of NO3-derived SOA evolves as a result of particle-phase reactions. Here, SOA was formed from the reaction of alpha-pinene with NO3 radicals generated from N2O5, and the resulting SOA was aged in the dark. The initial composition of NO3-derived alpha-pinene SOA was slightly dependent upon the concentration of N2O5 injected (excess of NO3 or excess of alpha-pinene) but was largely dominated by dimer dinitrates (C20H32N2O8-13). Oxidation reactions (e.g., C20H32N2O8 -> C20H32N2O9 -> C20H32N2O10) accounted for 60 %-70 % of the particle-phase reactions observed. Fragmentation reactions and dimer degradation pathways made up the remainder of the particle-phase processes occurring. The exact oxidant is not known, although suggestions are offered (e.g., N2O5, organic peroxides, or peroxynitrates). Hydrolysis of -ONO2 functional groups was not an important loss term during dark aging under the relative humidity conditions of our experiments (58 %-62 %), and changes in the bulk organonitrate composition were likely driven by evaporation of highly nitrogenated molecules. Overall, 25 %-30 % of the particle-phase composition changes as a function of particle-phase reactions during dark aging, representing an important atmospheric aging pathway.
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000866556100001
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/273453
作者单位	Swiss Federal Institutes of Technology Domain; Paul Scherrer Institute; Stockholm University; Swiss Federal Institutes of Technology Domain; ETH Zurich
推荐引用方式 GB/T 7714	Bell, David M.,Wu, Cheng,Bertrand, Amelie,et al. Particle-phase processing of alpha-pinene NO3 secondary organic aerosol in the dark[J],2022,22(19):16.
APA	Bell, David M..,Wu, Cheng.,Bertrand, Amelie.,Graham, Emelie.,Schoonbaert, Janne.,...&Mohr, Claudia.(2022).Particle-phase processing of alpha-pinene NO3 secondary organic aerosol in the dark.ATMOSPHERIC CHEMISTRY AND PHYSICS,22(19),16.
MLA	Bell, David M.,et al."Particle-phase processing of alpha-pinene NO3 secondary organic aerosol in the dark".ATMOSPHERIC CHEMISTRY AND PHYSICS 22.19(2022):16.