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DOI	10.1016/j.atmosenv.2019.117114
	Measurement of gaseous and particulate formaldehyde in the Yangtze River Delta, China
	Xu R.; Li X.; Dong H.; Wu Z.; Chen S.; Fang X.; Gao J.; Guo S.; Hu M.; Li D.; Liu Y.; Liu Y.; Lou S.; Lu K.; Meng X.; Wang H.; Zeng L.; Zong T.; Hu J.; Chen M.; Shao M.; Zhang Y.
发表日期	2020
ISSN	1352-2310
卷号	224
英文摘要	Formaldehyde (HCHO) is one of the most important intermediate products of atmospheric photochemical reactions and is also a radical source that promotes ozone formation. Given its high solubility, HCHO is likely to exist in particulate form. In this work, gaseous HCHO (HCHOg) and particulate HCHO (HCHOp) were separated and collected by a rotating wet annular denude (RWAD) and an aerosol growth chamber–coil aerosol cooler (AC). The collected HCHO from the RWAD and AC are measured by two online Hantzsch method-based formaldehyde analyzers. The comprehensive campaign was held in the Yangtze River Delta of China from 15 May to 18 June 2018, which is during the harvest season. Several biomass burning events were identified by using acetonitrile as a tracer. During the period influenced by biomass burning, the mixing ratios of HCHOg and HCHOp were respectively 122% and 231% higher than those during other time periods. The enhancement ratio of HCHOg to acetonitrile obtained from this work generally agrees with those from the existing literature. Biomass burning contributed 14.8% to HCHOg, but the abundant freshly discharged precursors it emitted greatly promoted the secondary production of HCHOg. We suggest that the high concentration of HCHOp during the biomass burning period was from uptake of HCHOg by aerosols during their transportation; the liquid state particles are conducive to HCHOg uptake. High relative humidity, a low particle rebound fraction f, as well as low temperatures may result in higher uptake coefficient values. © 2019 Elsevier Ltd
关键词	Biomass burning HCHO Liquid state Particle Uptake YRD
语种	英语
scopus关键词	Acetonitrile; Aerosols; Atmospheric humidity; Biomass; Formaldehyde; Free radical reactions; Photochemical reactions; Reaction intermediates; Biomass-burning; HCHO; High relative humidities; Intermediate product; Liquid state; Secondary production; Uptake; Yangtze river delta; Particles (particulate matter); acetonitrile; formaldehyde; aerosol; biomass burning; concentration (composition); detection method; measurement method; ozone; aerosol; airflow; biomass; China; gas; particulate matter; plume; priority journal; river; season; temperature; China; Yangtze River
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/249333
作者单位	State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, 100871, China; Collaborative Innovation Centre of Atmospheric Environment and Equipment Technology, Nanjing University of Information Science & Technology, Nanjing, 210044, China; International Joint Laboratory for Regional Pollution Control, Ministry of Education, Beijing, 100816, China; State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex, Shanghai Academy of Environmental Sciences, Shanghai, 200233, China; School of Environmental and Chemical Engineering, Shanghai University, Shanghai, 200444, China; Institute for Environmental and Climate Research, Jinan University, Guangzhou, 511443, China
推荐引用方式 GB/T 7714	Xu R.,Li X.,Dong H.,et al. Measurement of gaseous and particulate formaldehyde in the Yangtze River Delta, China[J],2020,224.
APA	Xu R..,Li X..,Dong H..,Wu Z..,Chen S..,...&Zhang Y..(2020).Measurement of gaseous and particulate formaldehyde in the Yangtze River Delta, China.ATMOSPHERIC ENVIRONMENT,224.
MLA	Xu R.,et al."Measurement of gaseous and particulate formaldehyde in the Yangtze River Delta, China".ATMOSPHERIC ENVIRONMENT 224(2020).