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DOI	10.1016/j.atmosres.2020.104905
	Effect of organic coatings derived from the OH-initiated oxidation of amines on soot morphology and cloud activation
	Chen C.; Enekwizu O.Y.; Ma X.; Jiang Y.; Khalizov A.F.; Zheng J.; Ma Y.
发表日期	2020
ISSN	0169-8095
卷号	239
英文摘要	The presence of coatings on soot particles may significantly influence their environmental impacts. In this study, the processing of soot by OH-initiated photooxidation of amines was investigated in a series of chamber experiments. Monodisperse soot aerosol was exposed to oxidation products of monoethanolamine (MEA), triethylamine (TEA) and aniline, and changes in particle size, mass, effective density, shape factor, and activation as cloud condensation nuclei (CCN) were simultaneously measured by a suite of instruments. Different initial concentrations of amine precursor were applied, and in selected experiments, organic coatings were removed by thermal denuding to investigate the change of the soot core structure. Aniline generated the largest amount of low volatility condensable oxidation products, which induced minimal soot restructuring even at a high aniline concentration. On the contrary, the high volatility of MEA oxidation products led to reversible condensation on soot while inducing significant aggregate collapse for a smaller coating mass than with aniline. The products from TEA photooxidation showed volatility intermediate between aniline and MEA and induced the most significant restructuring. It can be concluded that restructuring depended on the physical state of the coating material and its distribution over the aggregate surface. Soot aged with the three different amine precursors produced distinct CCN activity profiles that depended on measured coating mass, and there was an indication that intermediate volatility oxidation products of MEA co-condensed with water during the droplet activation process. © 2020 Elsevier B.V.
英文关键词	Amine; CCN; Photochemical aging; Restructuring; Soot
学科领域	Aggregates; Amines; Aniline; Chemical activation; Condensation; Dust; More electric aircraft; Morphology; Organic coatings; Oxidation; Particle size; Photooxidation; Reaction intermediates; Soot; Aniline concentration; Chamber experiments; Cloud condensation nuclei; Droplet activation; Effective density; Initial concentration; Oxidation products; Restructuring; Ethanolamines; aerosol formation; aging; cloud condensation nucleus; concentration (composition); hydroxide; oxidation; soot
语种	英语
scopus关键词	Aggregates; Amines; Aniline; Chemical activation; Condensation; Dust; More electric aircraft; Morphology; Organic coatings; Oxidation; Particle size; Photooxidation; Reaction intermediates; Soot; Aniline concentration; Chamber experiments; Cloud condensation nuclei; Droplet activation; Effective density; Initial concentration; Oxidation products; Restructuring; Ethanolamines; aerosol formation; aging; cloud condensation nucleus; concentration (composition); hydroxide; oxidation; soot
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/120417
作者单位	College of Resources and Environment, Chengdu University of Information Technology, Chengdu, Sichuan 610225, China; Collaborative Innovation Center of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing, 210044, China; Department of Chemical and Materials Engineering, New Jersey Institute of Technology, Newark, NJ 07102, United States; Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ 07102, United States
推荐引用方式 GB/T 7714	Chen C.,Enekwizu O.Y.,Ma X.,et al. Effect of organic coatings derived from the OH-initiated oxidation of amines on soot morphology and cloud activation[J],2020,239.
APA	Chen C..,Enekwizu O.Y..,Ma X..,Jiang Y..,Khalizov A.F..,...&Ma Y..(2020).Effect of organic coatings derived from the OH-initiated oxidation of amines on soot morphology and cloud activation.Atmospheric Research,239.
MLA	Chen C.,et al."Effect of organic coatings derived from the OH-initiated oxidation of amines on soot morphology and cloud activation".Atmospheric Research 239(2020).