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Sci Total Environ

Title:		Optical properties of secondary organic aerosols derived from long-chain alkanes under various NO(x) and seed conditions
Author(s):		Li J; Li K; Wang W; Wang J; Peng C; Ge M;
Address:		"State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China. Electronic address: wangwg@iccas.ac.cn. State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China; Center for Excellence in Regional Atmospheric Environment, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen 361021, PR China. Electronic address: gemaofa@iccas.ac.cn"
Journal Title:		Sci Total Environ
Year:		2017
Volume:		579
Issue:
Page Number:		1699 - 1705
DOI:		10.1016/j.scitotenv.2016.11.189
ISSN/ISBN:		1879-1026 (Electronic) 0048-9697 (Linking)
Abstract:		"Long-chain alkanes are a type of important intermediate-volatile organic compounds (IVOCs) in the atmosphere, which contribute to a large proportion of secondary organic aerosol (SOA). However, the optical properties of SOA derived from long-chain alkanes remain poorly understood. Here, we investigate the refractive index (RI) of SOA derived from photo-oxidation of dodecane (C12), pentadecane (C15) and heptadecane (C17) under low-NO(x) and high-NO(x) conditions with the absence or presence of inorganic aerosol seeds. The RIs of these SOAs are found to be in the range of 1.33 to 1.57 at the wavelength of 532nm. The results from mass spectroscopy indicate that both reaction mechanisms influenced by NO(x) level and gas-particle partitioning influenced by seeds have important impact on the chemical compositions of SOAs, which further influence the optical properties like RI. Finally, by comparing the RI values to other literature and model results, we suggest that various RIs of SOAs derived from long-chain alkanes should be applied in atmospheric and climate models"
Keywords:		IVOCs RIs Soa;
Notes:		"PubMed-not-MEDLINELi, Junling Li, Kun Wang, Weigang Wang, Jing Peng, Chao Ge, Maofa eng Netherlands 2016/12/06 Sci Total Environ. 2017 Feb 1; 579:1699-1705. doi: 10.1016/j.scitotenv.2016.11.189"