Carbonyl compounds over urban Beijing: Concentrations on haze and   non-haze days and effects on radical chemistry

doi:10.1016/j.atmosenv.2015.06.050

CORC > 北京大学 > 环境科学与工程学院

	Carbonyl compounds over urban Beijing: Concentrations on haze and non-haze days and effects on radical chemistry
	Rao, Zhihan ; Chen, Zhongming ; Liang, Hao ; Huang, Liubin ; Huang, Dao
刊名	ATMOSPHERIC ENVIRONMENT
	2016
关键词	Carbonyl compound Haze Source Radical cycling VOLATILE ORGANIC-COMPOUNDS HYDROGEN-PEROXIDE OXIDATION-PRODUCTS TRACE GASES AMBIENT AIR CLEAR DAYS AEROSOLS PHASE ATMOSPHERE CHINA
DOI	10.1016/j.atmosenv.2015.06.050
英文摘要	Carbonyl compounds play an important role in the formation of secondary aerosols and the cycling of free radicals in the atmosphere. We measured carbonyl compounds over urban Beijing, a megacity in the North China Plain, in summer and winter to investigate the relation of carbonyl compounds with haze and the interaction between carbonyl compounds and atmospheric radical cycling. We also determined carbonyl compounds in summer rainwater. Data of carbonyl compounds were analyzed in four cases, i.e., summer haze days (SHD), summer non-haze days (SND), winter haze days (WHD), and winter non-haze days (WND). Interestingly, the level of carbonyl compounds during WHO approached that of summer days. The results of the principal component analysis showed that there was no obvious source difference between SHD and SND. On WHO, however, more carbonyl compounds originated from the "diesel engine exhaust emission" than those on WND. We evaluated the effect of carbonyl compounds on the free radical cycling and the NO consumption potential for OH formation in the photochemical reactions using a novel ratio method. It was found that the production rate of ROx (the sum of OH, HO2 and RO2 radicals) was highest on SND, while the yield of ROx radicals from the reactions of carbonyl compounds was highest on WHD. Further, carbonyl compounds consumed more NO to produce OH radicals on WHO compared to the other three cases. (C) 2015 Elsevier Ltd. All rights reserved.; National Natural Science Foundation of China [41275125, 21477002, 21190053, 41121004]; SCI(E); EI; ARTICLE; zmchen@pku.edu.cn; 207-216; 124
语种	中文
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437966]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Rao, Zhihan,Chen, Zhongming,Liang, Hao,et al. Carbonyl compounds over urban Beijing: Concentrations on haze and non-haze days and effects on radical chemistry[J]. ATMOSPHERIC ENVIRONMENT,2016.
APA	Rao, Zhihan,Chen, Zhongming,Liang, Hao,Huang, Liubin,&Huang, Dao.(2016).Carbonyl compounds over urban Beijing: Concentrations on haze and non-haze days and effects on radical chemistry.ATMOSPHERIC ENVIRONMENT.
MLA	Rao, Zhihan,et al."Carbonyl compounds over urban Beijing: Concentrations on haze and non-haze days and effects on radical chemistry".ATMOSPHERIC ENVIRONMENT (2016).