Photochemical Aging of Beijing Urban PM2.5: HONO Production

doi:10.1021/acs.est.8b00538

CORC > 化学研究所 > 中国科学院化学研究所

	Photochemical Aging of Beijing Urban PM2.5: HONO Production
	Bao, Fengxia 1,2; Li, Meng 1,2; Zhang, Yue 1,2; Chen, Chuncheng 1,2; Zhao, Jincai 1,2
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2018-06-05
卷号	52 期号:11 页码:6309-6316
ISSN号	0013-936X
DOI	10.1021/acs.est.8b00538
英文摘要	Photochemical aging represents an important transformation process of aerosol particles in the atmosphere, which greatly influences the physicochemical properties and the environmental impact of aerosols. In this work, we find that Beijing urban PM2.5 aerosol particles release substantial HONO, a significant precursor of center dot OH radicals, into the gas phase during the photochemical aging process. The generation of HONO exhibits a high correlation with the amount of nitrate in PM2.5 . The formation rate of HONO becomes gradually decreased with the irradiation time, but can be restored by introducing the acidic proton, indicative of the essential role of the acidic proton in the HONO production. Other environmental factors such as relative humidity, light intensity, and reaction temperature also possess important influences on HONO production. The normalized photolysis HONO (J(HNO3 -> HONO)) is in the range of 1.22 X 10(-5) s(-1) similar to 4.84 x 10(-4) s(-1) , which is 1-3 orders of magnitude higher than the reported photolysis rate constant of gaseous HNO3 . The present study implies that the photochemical aging of Beijing PM2.5 is an important atmospheric HONO production source.
语种	英语
出版者	AMER CHEMICAL SOC
WOS记录号	WOS:000434892900025
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/42883]
专题	中国科学院化学研究所
通讯作者	Chen, Chuncheng
作者单位	1.Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, Key Lab Photochem, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Bao, Fengxia,Li, Meng,Zhang, Yue,et al. Photochemical Aging of Beijing Urban PM2.5: HONO Production[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2018,52(11):6309-6316.
APA	Bao, Fengxia,Li, Meng,Zhang, Yue,Chen, Chuncheng,&Zhao, Jincai.(2018).Photochemical Aging of Beijing Urban PM2.5: HONO Production.ENVIRONMENTAL SCIENCE & TECHNOLOGY,52(11),6309-6316.
MLA	Bao, Fengxia,et al."Photochemical Aging of Beijing Urban PM2.5: HONO Production".ENVIRONMENTAL SCIENCE & TECHNOLOGY 52.11(2018):6309-6316.