Variations and sources of nitrous acid (HONO) during a severe pollution episode in Beijing in winter 2016

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 大气污染控制中心

	Variations and sources of nitrous acid (HONO) during a severe pollution episode in Beijing in winter 2016
	Zhang, Wenqian ; Tong, Shengrui ; Ge, Maofa ; An, Junling ; Shi, Zongbo ; Hou, Siqi ; Xia, Kaihui ; Qu, Yu ; Zhang, Hongxing ; Chu, Biwu
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-01-15
卷号	648 页码:253-262
关键词	Nitrous acid measurement Haze Vehicle emissions Homogeneous reaction Daytime HONO budget
ISSN号	0048-9697
英文摘要	HONO is an important precursor of OH radical and plays a key role in atmospheric chemistry, but its source and formation mechanism remain uncertain, especially during complex atmospheric pollution processes. In this study, HONO mixing ratios were measured by a custom-macle instrument during a severe pollution event from 16 to 23 December 2016, at an urban area of Beijing. The measurement was divided into three periods: I (haze), II (severe haze) and III (clean), according to the levels of PM25. This pollution episode was characterized by high levels of NO (75 +/- 39 and 94 +/- 40 ppbV during periods I and II, respectively) and HONO (up to 10.7 ppbV). During the nighttime, the average heterogeneous conversion frequency during the two haze periods were estimated to be 0.0058 and 0.0146 h(-1), and it was not the important way to form HONO. Vehicle emissions contributed 52% (+16)% and 40% (+/- 18)% to ambient HONO at nighttime during periods I and II. The contribution of homogeneous reaction of NO with OH should be reconsidered under high-NOx conditions and could be noticeable to HONO sources during this pollution event Furthermore, HONO was positively correlated with PM25 during periods I and II, suggesting a potential chemical link between HONO and haze particles. (C) 2018 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/43163]
专题	生态环境研究中心_大气污染控制中心
作者单位	1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Chem, CAS Res Educ Ctr Excellence Mol Sci, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Univ Birmingham, Sch Geog Earth & Environm Sci, Birmingham B15 2TT, W Midlands, England 5.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Wenqian,Tong, Shengrui,Ge, Maofa,et al. Variations and sources of nitrous acid (HONO) during a severe pollution episode in Beijing in winter 2016[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,648:253-262.
APA	Zhang, Wenqian.,Tong, Shengrui.,Ge, Maofa.,An, Junling.,Shi, Zongbo.,...&He, Hong.(2019).Variations and sources of nitrous acid (HONO) during a severe pollution episode in Beijing in winter 2016.SCIENCE OF THE TOTAL ENVIRONMENT,648,253-262.
MLA	Zhang, Wenqian,et al."Variations and sources of nitrous acid (HONO) during a severe pollution episode in Beijing in winter 2016".SCIENCE OF THE TOTAL ENVIRONMENT 648(2019):253-262.