气候变化领域集成服务门户(CCPortal): Secondary organic aerosol formation from α-methylstyrene atmospheric degradation: Role of NOx level; relative humidity and inorganic seed aerosol

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DOI	10.1016/j.atmosres.2019.104631
	Secondary organic aerosol formation from α-methylstyrene atmospheric degradation: Role of NOx level; relative humidity and inorganic seed aerosol
	Tajuelo M.; Rodríguez A.; Baeza-Romero M.T.; Aranda A.; Díaz-de-Mera Y.; Rodríguez D.
发表日期	2019
ISSN	0169-8095
卷号	230
英文摘要	Secondary Organic Aerosol (SOA) formation during the photolysis and OH-photooxidation of α-methylstyrene was investigated using a simulation chamber at atmospheric pressure and room temperature (296 ± 1) K. α-Methylstyrene concentration was followed by gas chromatography with a mass spectrometric detector (GC–MS) and the aerosol production was monitored using a Fast Mobility Particle Sizer (FMPS). The effect of varying α-methylstyrene (0.5 ppm - 2 ppm) and NOx (0.5 ppm - 1.0 ppm) concentrations on SOA formation was explored, as was the effect of the relative humidity (RH) (5–50%) and the presence of inorganic seed particles. Results indicate that SOA yields increase at higher α-methylstyrene concentrations; low NOx and high RH conditions favour more rapid aerosol formation and a higher aerosol yield; SOA formation is independent of seed surface area, within the studied range, for both inorganic seed particles ((NH4)2SO4 and CaCl2). An off-line chemical analysis using a filter/denuder sampling system and GC–MS confirms acetophenone as the main gas phase product in both processes, photolysis and photooxidation. For the first time, SOA composition in α-methylstyrene degradation was analysed, observing acetophenone and acetol as products present in the formed aerosol in presence and absence of NOx. © 2019
英文关键词	Inorganic seed aerosols; NOx; Relative humidity; SOA; α-Methylstyrene
语种	英语
scopus关键词	Aerosols; Atmospheric chemistry; Atmospheric pressure; Gas chromatography; Ketones; Mass spectrometry; Nitrogen oxides; Photolysis; Photooxidation; Alpha methylstyrene; Atmospheric degradation; Fast mobility particle sizers; Inorganic seed particles; Mass spectrometric detectors; Methylstyrene; Secondary organic aerosols; Simulation chambers; Atmospheric humidity; aerosol formation; concentration (composition); degradation; inorganic nitrogen; nitrogen oxides; photolysis; relative humidity
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/162245
作者单位	University of Castilla La Mancha, Faculty of Environmental Sciences and Biochemistry, Avenida Carlos III, s/n, Toledo, 45071, Spain; University of Castilla La Mancha, School of Industrial Engineering, Avenida Carlos III, s/n, Toledo, 45071, Spain; University of Castilla La Mancha, Faculty of Chemical Sciences, Avenida Camilo José Cela 10, Ciudad Real, 13071, Spain
推荐引用方式 GB/T 7714	Tajuelo M.,Rodríguez A.,Baeza-Romero M.T.,et al. Secondary organic aerosol formation from α-methylstyrene atmospheric degradation: Role of NOx level; relative humidity and inorganic seed aerosol[J],2019,230.
APA	Tajuelo M.,Rodríguez A.,Baeza-Romero M.T.,Aranda A.,Díaz-de-Mera Y.,&Rodríguez D..(2019).Secondary organic aerosol formation from α-methylstyrene atmospheric degradation: Role of NOx level; relative humidity and inorganic seed aerosol.Atmospheric Research,230.
MLA	Tajuelo M.,et al."Secondary organic aerosol formation from α-methylstyrene atmospheric degradation: Role of NOx level; relative humidity and inorganic seed aerosol".Atmospheric Research 230(2019).