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DOI	10.5194/acp-19-2701-2019
	Effect of salt seed particle surface area; composition and phase on secondary organic aerosol mass yields in oxidation flow reactors
	Ahlberg E.; Eriksson A.; Brune W.H.; Roldin P.; Svenningsson B.
发表日期	2019
ISSN	16807316
起始页码	2701
结束页码	2712
卷号	19 期号:4
英文摘要	Atmospheric particulate water is ubiquitous, affecting particle transport and uptake of gases. Yet, research on the effect of water on secondary organic aerosol (SOA) mass yields is not consistent. In this study, the SOA mass yields of an α-pinene and m-xylene mixture, at a concentration of 60 μgm-3, were examined using an oxidation flow reactor operated at a relative humidity (RH) of 60% and a residence time of 160 s. Wet or dried ammonium sulfate and ammonium nitrate seed particles were used. By varying the amount of seed particle surface area, the underestimation of SOA formation induced by the short residence time in flow reactors was confirmed. Starting at a SOA mass concentration of 5 μgm-3, the maximum yield increased by a factor of 2 with dry seed particles and on average a factor of 3.2 with wet seed particles. Hence, wet particles increased the SOA mass yield by 60% compared to the dry experiment. Maximum yield in the reactor was achieved using a surface area concentration of 1600 μm2 cm-3. This corresponded to a condensational lifetime of 20 s for low-volatility organics. The O V C ratio of SOA on wet ammonium sulfate was significantly higher than when using ammonium nitrate or dry ammonium sulfate seed particles, probably due to differences in heterogeneous chemistry. © Author(s) 2019.
语种	英语
scopus关键词	aerosol; ammonium nitrate; ammonium sulfate; atmospheric chemistry; chemical composition; fluid flow; organic compound; oxidation; particulate matter; surface area
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/144604
作者单位	Centre for Environmental and Climate Research, Lund University, Sölvegatan 37, Lund, 223 52, Sweden; Division of Nuclear Physics, Lund University, Box 118, Lund, 221 00, Sweden; Ergonomics and Aerosol Technology, Lund University, Box 118, Lund, 221 00, Sweden; Department of Meteorology, Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Ahlberg E.,Eriksson A.,Brune W.H.,et al. Effect of salt seed particle surface area; composition and phase on secondary organic aerosol mass yields in oxidation flow reactors[J],2019,19(4).
APA	Ahlberg E.,Eriksson A.,Brune W.H.,Roldin P.,&Svenningsson B..(2019).Effect of salt seed particle surface area; composition and phase on secondary organic aerosol mass yields in oxidation flow reactors.Atmospheric Chemistry and Physics,19(4).
MLA	Ahlberg E.,et al."Effect of salt seed particle surface area; composition and phase on secondary organic aerosol mass yields in oxidation flow reactors".Atmospheric Chemistry and Physics 19.4(2019).