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DOI	10.1016/j.atmosenv.2021.118600
	Formation of secondary organic aerosols from the reaction of γ-terpinene with ozone: yields and morphology
	Fayad L.; Coeur C.; Houzel N.; Deboudt K.; Sécordel X.; Bouzidi H.; Mouret G.
发表日期	2021
ISSN	1352-2310
卷号	262
英文摘要	Atmospheric secondary organic aerosols (SOAs), formed from condensable oxidation products of anthropogenic and biogenic volatile organic compounds (VOCs), are important constituents of the atmosphere accounting for a significant fraction of ambient tropospheric aerosol. In this study, the formation of SOAs from the gas-phase ozonolysis of γ-terpinene (1-isopropyl-4-methyl-1,4-cyclohexadiene), a monoterpene emitted by many different trees (elm, cypress, water hickory, maple trees …) has been studied in an indoor atmospheric simulation chamber (CHARME), at 294 ± 2 K, atmospheric pressure, under dry conditions (relative humidity, RH < 2%) and in absence of seed particles. The concentration of γ-terpinene was measured by a proton Transfer Reaction - Time of Flight - Mass Spectrometer (PTR-ToF-MS), that of ozone by an UV photometric analyzer and the aerosol mass concentration was monitored using a scanning mobility particle sizer (SMPS). Scanning electronic microscopy (SEM) observations were performed to characterize the physical state and morphology of the formed SOAs. They show the formation of spherical particles in a viscous state. The overall organic aerosol yield (Y) was determined as the ratio of the suspended aerosol mass concentration corrected for wall losses (Mo) to the total reacted γ-terpinene concentration, assuming a particle density of 1 g cm−3. The aerosol formation yield increases as the initial γ-terpinene concentration raises. The presence of an OH radical scavenger (cyclohexane) leads to a decrease in the SOA yields (they varied from 0.11 to 0.54 and from 0.16 to 0.49, without and with, an OH radical scavenger, respectively). Y is a strong function of Mo and the organic aerosol formation can be expressed by a one-product gas/particle partitioning absorption model. © 2021 Elsevier Ltd
关键词	Secondary organic aerosols Simulation chamber γ-terpinene ozonolysis
语种	英语
scopus关键词	Aerosols; Atmospheric humidity; Atmospheric pressure; Forestry; Free radicals; Monoterpenes; Morphology; Proton transfer; Volatile organic compounds; Aerosol mass concentration; OH radical; Organic aerosol; Oxidation products; Ozone yield; Radical scavengers; Secondary organic aerosol; Simulation chambers; Terpinene; Γ-terpinene ozonolyse; Ozone; 3 carene; chemical compound; cyclohexane; hydrocarbon; hydroxyl radical; limonene; molybdenum; monoterpene; ozone; pinene; scavenger; terpinene; volatile organic compound; water; aerosol; aerosol formation; monoterpene; ozone; reaction kinetics; scanning electron microscopy; scavenger; seed; aerosol; Article; atmosphere; atmospheric pressure; chemical reaction; chemical structure; concentration process; controlled study; elm; gas; humidity; maple tree; nonhuman; oxidation kinetics; ozonolysis; particle size; phase transition; photometry; plant seed; proton transfer reaction time of flight mass spectrometry; proton transport; reaction analysis; reaction time; relative humidity; scanning electron microscopy; secondary organic aerosol; simulation; time of flight mass spectrometry; tree; ultraviolet radiation; water hickory; Carya aquatica; Cupressus
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/248284
作者单位	Laboratoire de Physico-Chimie de l'Atmosphère, Université du Littoral Côte d'Opale, 189A Avenue Maurice Schumann, Dunkerque, France
推荐引用方式 GB/T 7714	Fayad L.,Coeur C.,Houzel N.,et al. Formation of secondary organic aerosols from the reaction of γ-terpinene with ozone: yields and morphology[J],2021,262.
APA	Fayad L..,Coeur C..,Houzel N..,Deboudt K..,Sécordel X..,...&Mouret G..(2021).Formation of secondary organic aerosols from the reaction of γ-terpinene with ozone: yields and morphology.ATMOSPHERIC ENVIRONMENT,262.
MLA	Fayad L.,et al."Formation of secondary organic aerosols from the reaction of γ-terpinene with ozone: yields and morphology".ATMOSPHERIC ENVIRONMENT 262(2021).