气候变化领域集成服务门户(CCPortal): Exploring the composition and volatility of secondary organic aerosols in mixed anthropogenic and biogenic precursor systems

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DOI	10.5194/acp-21-14251-2021
	Exploring the composition and volatility of secondary organic aerosols in mixed anthropogenic and biogenic precursor systems
	Voliotis A.; Wang Y.; Shao Y.; Du M.; Bannan T.J.; Percival C.J.; Pandis S.N.; Alfarra M.R.; McFiggans G.
发表日期	2021
ISSN	1680-7316
起始页码	14251
结束页码	14273
卷号	21 期号:18
英文摘要	Secondary organic aerosol (SOA) formation from mixtures of volatile precursors may be influenced by the molecular interactions of the components of the mixture. Here, we report measurements of the volatility distribution of SOA formed from the photo-oxidation of o-cresol, α-pinene, and their mixtures, representative anthropogenic and biogenic precursors, in an atmospheric simulation chamber. The combination of two independent thermal techniques (thermal denuder, TD, and the Filter Inlet for Gases and Aerosols coupled to a high-resolution time-of-flight chemical ionization mass spectrometer, FIGAERO-CIMS) to measure the particle volatility, along with detailed gas-and particle-phase composition measurements, provides links between the chemical composition of the mixture and the resultant SOA particle volatility. The SOA particle volatility obtained by the two independent techniques showed substantial discrepancies. The particle volatility obtained by the TD was wider, spanning across the LVOC and SVOC range, while the respective FIGAERO-CIMS derived using two different methods (i.e. calibrated Tmax and partitioning calculations) was substantially higher (mainly in the SVOC and IVOC, respectively) and narrow. Although the quantification of the SOA particle volatility was challenging, both techniques and methods showed similar trends, with the volatility of the SOA formed from the photo-oxidation of α-pinene being higher than that measured in the o-cresol system, while the volatility of the SOA particles of the mixture was between those measured at the single-precursor systems. This behaviour could be explained by two opposite effects, the scavenging of the larger molecules with lower volatility produced in the single-precursor experiments that led to an increase in the average volatility and the formation of unique-to-the-mixture products that had higher O:C, MW, OSc and, consequently, lower volatility compared to those derived from the individual precursors. We further discuss the potential limitations of FIGAERO-CIMS to report quantitative volatilities and their implications for the reported results, and we show that the particle volatility changes can be qualitatively assessed, while caution should be taken when linking the chemical composition to the particle volatility. These results present the first detailed observations of SOA particle volatility and composition in mixed anthropogenic and biogenic systems and provide an analytical context that can be used to explore particle volatility in chamber experiments. © 2021 Aristeidis Voliotis et al.
语种	英语
scopus关键词	aerosol composition; anthropogenic source; biogenic deposit; chemical composition; concentration (composition); experimental study; formation mechanism; qualitative analysis; volatile element
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/246557
作者单位	Centre for Atmospheric Science, Department of Earth and Environmental Science, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom; Nasa Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109, United States; Department of Chemical Engineering, University of Patras, Patras, Greece; National Centre for Atmospheric Science, Department of Earth and Environmental Science, School of Natural Sciences, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
推荐引用方式 GB/T 7714	Voliotis A.,Wang Y.,Shao Y.,et al. Exploring the composition and volatility of secondary organic aerosols in mixed anthropogenic and biogenic precursor systems[J],2021,21(18).
APA	Voliotis A..,Wang Y..,Shao Y..,Du M..,Bannan T.J..,...&McFiggans G..(2021).Exploring the composition and volatility of secondary organic aerosols in mixed anthropogenic and biogenic precursor systems.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(18).
MLA	Voliotis A.,et al."Exploring the composition and volatility of secondary organic aerosols in mixed anthropogenic and biogenic precursor systems".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.18(2021).