气候变化领域集成服务门户(CCPortal): Evolution of volatility and composition in sesquiterpene-mixed and α-pinene secondary organic aerosol particles during isothermal evaporation

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DOI	10.5194/acp-21-18283-2021
	Evolution of volatility and composition in sesquiterpene-mixed and α-pinene secondary organic aerosol particles during isothermal evaporation
	Li Z.; Buchholz A.; Ylisirniö A.; Barreira L.; Hao L.; Schobesberger S.; Yli-Juuti T.; Virtanen A.
发表日期	2021
ISSN	1680-7316
起始页码	18283
结束页码	18302
卷号	21 期号:24
英文摘要	Efforts have been spent on investigating the isothermal evaporation of α-pinene secondary organic aerosol (SOA) particles at ranges of conditions and decoupling the impacts of viscosity and volatility on evaporation. However, little is known about the evaporation behavior of SOA particles from biogenic organic compounds other than α-pinene. In this study, we investigated the isothermal evaporation behavior of the α-pinene and sesquiterpene mixture (SQTmix) SOA particles under a series of relative humidity (RH) conditions. With a set of in situ instruments, we monitored the evolution of particle size, volatility, and composition during evaporation. Our finding demonstrates that the SQTmix SOA particles evaporated slower than the α-pinene ones at any set of RH (expressed with the volume fraction remaining, VFR), which is primarily due to their lower volatility and possibly aided by higher viscosity under dry conditions. We further applied positive matrix factorization (PMF) to the thermal desorption data containing volatility and composition information. Analyzing the net change ratios (NCRs) of each PMF-resolved factor, we can quantitatively compare how each sample factor evolves with increasing evaporation time or RH. When sufficient particulate water content was present in either SOA system, the most volatile sample factor was primarily lost via evaporation, and changes in the other sample factors were mainly governed by aqueous-phase processes. The evolution of each sample factor of the SQTmix SOA particles was controlled by a single type of process, whereas for the α-pinene SOA particles it was regulated by multiple processes. As indicated by the coevolution of VFR and NCR, the effect of aqueous-phase processes could vary from one to another according to particle type, sample factors, and evaporation timescale. © 2021 Zijun Li et al.
语种	英语
scopus关键词	aerosol; aerosol composition; evaporation; isotherm; particle size; quantitative analysis; terpene; timescale; volatile organic compound
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/246355
作者单位	Department of Applied Physics, University of Eastern Finland, Kuopio, Finland; Atmospheric Composition Research, Finnish Meteorological Institute, Helsinki, Finland
推荐引用方式 GB/T 7714	Li Z.,Buchholz A.,Ylisirniö A.,et al. Evolution of volatility and composition in sesquiterpene-mixed and α-pinene secondary organic aerosol particles during isothermal evaporation[J],2021,21(24).
APA	Li Z..,Buchholz A..,Ylisirniö A..,Barreira L..,Hao L..,...&Virtanen A..(2021).Evolution of volatility and composition in sesquiterpene-mixed and α-pinene secondary organic aerosol particles during isothermal evaporation.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(24).
MLA	Li Z.,et al."Evolution of volatility and composition in sesquiterpene-mixed and α-pinene secondary organic aerosol particles during isothermal evaporation".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.24(2021).