Effects of Gas-Particle Partitioning on Refractive Index and Chemical Composition of m-Xylene Secondary Organic Aerosol

doi:10.1021/acs.jpca.7b12792

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	Effects of Gas-Particle Partitioning on Refractive Index and Chemical Composition of m-Xylene Secondary Organic Aerosol
	Li, Kun 1,3,4; Li, Junling 1,3; Wang, Weigang 1,3; Li, Jiangjun 2,3; Peng, Chao 1,3; Wnag, Dong 2,3; Ge, Maofa 1,3
刊名	JOURNAL OF PHYSICAL CHEMISTRY A
	2018-03-29
卷号	122 期号:12 页码:3250-3260
ISSN号	1089-5639
DOI	10.1021/acs.jpca.7b12792
英文摘要	The formation of secondary organic aerosols (SOAs) contains partitioning processes of the oxidation products between the gas and particle phases, which could change the particle-phase composition when particles grow. However, the effects of these processes on the optical properties of SOA remain poorly understood. In this study, we performed smog chamber experiments to investigate the effects of gas-particle partitioning (GPP) on the refractive index (RI) and chemical composition of the m-xylene SOA. Here, we show that the GPP processes, as organic mass increases, can increase the proportions of semivolatile and intermediate-volatility organic compounds (SVOCs and IVOCs) in the particle phase and result in the decrease of SOA RI real part for 0.09 +/- 0.02 (without seeds) and 0.15 +/- 0.02 (with seeds). This indicates that the SOA optical properties are closely related to the total organic mass and molecular-level composition. In addition, the presence of inorganic seeds promotes the GPP to the particle phase and hence further decreases the RI real part for 0.05 +/- 0.02. As pre-existing aerosols are ubiquitous in the ambient atmosphere, it is suggested that there should be a certain correction when the SOA RI of previous laboratory studies is applied to air quality and climate models.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000429080300018
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/45877]
专题	中国科学院化学研究所
通讯作者	Wang, Weigang; Ge, Maofa
作者单位	1.Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Mol Nanostruct & Nanotechnol, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Environm & Climate Change Canada, Air Qual Res Div, Toronto, ON M3H 5T4, Canada
推荐引用方式 GB/T 7714	Li, Kun,Li, Junling,Wang, Weigang,et al. Effects of Gas-Particle Partitioning on Refractive Index and Chemical Composition of m-Xylene Secondary Organic Aerosol[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2018,122(12):3250-3260.
APA	Li, Kun.,Li, Junling.,Wang, Weigang.,Li, Jiangjun.,Peng, Chao.,...&Ge, Maofa.(2018).Effects of Gas-Particle Partitioning on Refractive Index and Chemical Composition of m-Xylene Secondary Organic Aerosol.JOURNAL OF PHYSICAL CHEMISTRY A,122(12),3250-3260.
MLA	Li, Kun,et al."Effects of Gas-Particle Partitioning on Refractive Index and Chemical Composition of m-Xylene Secondary Organic Aerosol".JOURNAL OF PHYSICAL CHEMISTRY A 122.12(2018):3250-3260.