气候变化领域集成服务门户(CCPortal): Effects of NH3 on secondary aerosol formation from toluene/NOx photo-oxidation in different O3 formation regimes

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DOI	10.1016/j.atmosenv.2021.118603
	Effects of NH3 on secondary aerosol formation from toluene/NOx photo-oxidation in different O3 formation regimes
	Bao Z.; Xu H.; Li K.; Chen L.; Zhang X.; Wu X.; Gao X.; Azzi M.; Cen K.
发表日期	2021
ISSN	1352-2310
卷号	261
英文摘要	Ammonia (NH3) is an important base gas in the atmosphere and has received extensive research interest due to its role on secondary aerosol formation. However, the effects of NH3 on the photochemical smog oxidants formation including ozone and secondary aerosol did not attract much attention. In this study, a set of smog chamber experiments was conducted under toluene/NOx photo-oxidation base condition and adding NH3 in the following photochemical regimes referred as hydrocarbon, NOx-limited and transitional regimes. Dedicated instruments including gas analysers, scanning mobility particle sizer (SMPS), aerosol mass spectrometry (HR-ToF-AMS) were used to measure the gaseous compounds, aerosol mass concentration and chemical composition. It was found that the presence of NH3 did not affect the O3 formation rate. However, the particle number concentration increased dramatically after NH3 was injected in any photochemical regimes. This effect has been mainly attributed to the rapid formation of organic ammonium and ammonium nitrate. The mass spectra of organic aerosols from AMS showed that the most abundant fragments were at m/z 28, 29, 43 and 44, which became higher after the addition of NH3 in the transition and NOx-limited regimes, indicating that NH3 could enhance the formation of the compounds containing carbonyl and carboxylic acid functional groups. Compared to hydrocarbon-limited regime, higher atomic nitrogen-to-carbon (N:C) ratios were observed when NH3 were injected into transition and NOx-limited regimes, and this is mainly due to more organic nitrate formation. Four factors, which were assigned to inorganic nitrate aerosols, carboxylic acid compounds, carbonyl compounds and N-containing organic compounds (NOC), were identified and interpreted by applying the positive matrix factorization (PMF) to the AMS dataset. These results provide new insights into the complex chemistry of toluene/NOx/NH3 during different O3 formation regimes, and imply the benefit of controlling NH3 to mitigate PM2.5 when O3 formation is under VOC-limited regime. © 2021
关键词	Ammonia AMS Chemical composition O3 formation regimes Smog chamber
语种	英语
scopus关键词	Aerosols; Air pollution; Carboxylic acids; Factorization; Mass spectrometry; Nitrates; Nitrogen oxides; Toluene; Aerosol formation; AMS; Chemical compositions; NH$-3$; O3 formation regime; Organics; Photo oxidation; Photochemicals; Secondary aerosols; Smog chambers; Ammonia; ammonia; ammonium nitrate; carbon; carbonyl derivative; carboxylic acid; hydrocarbon; nitric oxide; nitrogen; oxygen; toluene; aerosol; aerosol formation; carboxylic acid; mass spectrometry; oxidation; ozone; toluene; addition reaction; Article; atom; controlled study; gas analysis; mass; mass spectrometry; particle size; photooxidation; secondary organic aerosol
来源期刊	ATMOSPHERIC ENVIRONMENT
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/248313
作者单位	State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China; Univ Lyon, Université Claude Bernard Lyon 1, CNRS, IRCELYON, Villeurbanne, F-69626, France; New South Wales Department of Planning, Industry and Environment, PO Box 29, Lidcombe, NSW 1825, Australia
推荐引用方式 GB/T 7714	Bao Z.,Xu H.,Li K.,et al. Effects of NH3 on secondary aerosol formation from toluene/NOx photo-oxidation in different O3 formation regimes[J],2021,261.
APA	Bao Z..,Xu H..,Li K..,Chen L..,Zhang X..,...&Cen K..(2021).Effects of NH3 on secondary aerosol formation from toluene/NOx photo-oxidation in different O3 formation regimes.ATMOSPHERIC ENVIRONMENT,261.
MLA	Bao Z.,et al."Effects of NH3 on secondary aerosol formation from toluene/NOx photo-oxidation in different O3 formation regimes".ATMOSPHERIC ENVIRONMENT 261(2021).