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DOI10.5194/acp-19-10557-2019
NH3-promoted hydrolysis of NO2 induces explosive growth in HONO
Xu, Wanyun1; Kuang, Ye2; Zhao, Chunsheng3; Tao, Jiangchuan2; Zhao, Gang3; Bian, Yuxuan4; Yang, Wen5; Yu, Yingli3; Shen, Chuanyang3; Liang, Linlin1; Zhang, Gen1; Lin, Weili6; Xu, Xiaobin1
2019-08-21
发表期刊ATMOSPHERIC CHEMISTRY AND PHYSICS
ISSN1680-7316
EISSN1680-7324
出版年2019
卷号19期号:16页码:10557-10570
文章类型Article
语种英语
国家Peoples R China
英文摘要

The study of atmospheric nitrous acid (HONO), which is the primary source of OH radicals, is crucial with respect to understanding atmospheric photochemistry and heterogeneous chemical processes. Heterogeneous NO2 chemistry under haze conditions has been identified as one of the missing sources of HONO on the North China Plain, and also produces sulfate and nitrate. However, controversy exists regarding the various proposed HONO production mechanisms, mainly regarding whether SO2 directly takes part in the HONO production process and what roles NH3 and the pH value play. In this paper, never before seen explosive HONO production was reported and evidence was found - for the first time in field measurements during fog (usually with 4< pH <6) and haze episodes under high relative humidity (pH approximate to 4) - that NH3 was the key factor that promoted the hydrolysis of NO2, leading to the explosive growth of HONO and nitrate under both high and relatively lower pH conditions. The results also suggest that SO2 plays a minor or insignificant role in HONO formation during fog and haze events, but was indirectly oxidized upon the photolysis of HONO via subsequent radical mechanisms. Aerosol hygroscopicity significantly increased with rapid inorganic secondary aerosol formation, further promoting HONO production as a positive feedback. For future photochemical and aerosol pollution abatement, it is crucial to introduce effective NH3 emission control measures, as NH3-promoted NO2 hydrolysis is a large daytime HONO source, releasing large amounts of OH radicals upon photolysis, which will contribute largely to both atmospheric photochemistry and secondary aerosol formation.


领域地球科学
收录类别SCI-E
WOS记录号WOS:000482004300005
WOS关键词NITROUS-ACID HONO ; FINE-PARTICLE PH ; REGIONAL TRANSPORT ; URBAN ATMOSPHERE ; HAZE EPISODES ; WINTER HAZE ; RURAL SITE ; CHINA ; WATER ; SULFATE
WOS类目Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
引用统计
被引频次:52[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://119.78.100.173/C666/handle/2XK7JSWQ/186100
专题地球科学
作者单位1.Chinese Acad Meteorol Sci, Inst Atmospher Composit, Key Lab Atmospher Chem, State Key Lab Severe Weather, Beijing 100081, Peoples R China;
2.Jinan Univ, Inst Environm & Climate Res, Guangzhou, Guangdong, Peoples R China;
3.Peking Univ, Sch Phys, Dept Atmospher & Ocean Sci, Beijing, Peoples R China;
4.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing 100081, Peoples R China;
5.Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100081, Peoples R China;
6.Minzu Univ China, Coll Life & Environm Sci, Beijing 100081, Peoples R China
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GB/T 7714
Xu, Wanyun,Kuang, Ye,Zhao, Chunsheng,et al. NH3-promoted hydrolysis of NO2 induces explosive growth in HONO[J]. ATMOSPHERIC CHEMISTRY AND PHYSICS,2019,19(16):10557-10570.
APA Xu, Wanyun.,Kuang, Ye.,Zhao, Chunsheng.,Tao, Jiangchuan.,Zhao, Gang.,...&Xu, Xiaobin.(2019).NH3-promoted hydrolysis of NO2 induces explosive growth in HONO.ATMOSPHERIC CHEMISTRY AND PHYSICS,19(16),10557-10570.
MLA Xu, Wanyun,et al."NH3-promoted hydrolysis of NO2 induces explosive growth in HONO".ATMOSPHERIC CHEMISTRY AND PHYSICS 19.16(2019):10557-10570.
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