Long-term winter observation of nitrous acid in the urban area of Beijing

被引：10

作者：

Lian, Chaofan ^{[1
,2
]}

Wang, Weigang ^{[1
,2
]}

Chen, Yan ^{[1
,2
]}

Zhang, Yusheng ^{[3
]}

Zhang, Jingwei ^{[4
]}

Liu, Yongchun ^{[3
]}

Fan, Xiaolong ^{[3
]}

Li, Chang ^{[3
]}

Zhan, Junlei ^{[3
]}

Lin, Zhuohui ^{[3
]}

Hua, Chenjie ^{[3
]}

Zhang, Wenyu ^{[1
,2
]}

Liu, Mingyuan ^{[1
,2
]}

Li, Junling ^{[5
]}

Wang, Xuefei ^{[2
]}

An, Junling ^{[2
,4
,6
]}

Ge, Maofa ^{[1
,2
,6
]}

机构：

[1] Chinese Acad Sci, CAS Res Educ Ctr Excellence Mol Sci, Inst Chem, State Key Lab Struct Chem Unstable & Stable Speci, Beijing 100190, Peoples R China

[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[3] Beijing Univ Chem Technol, Adv Innovat Ctr Soft Matter Sci & Engn, Aerosol & Haze Lab, Beijing 100029, Peoples R China

[4] Chinese Acad Sci, Inst Atmospher Phys IAP, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China

[5] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China

[6] Chinese Acad Sci, Ctr Excellence Urban Atmospher Environm, Inst Urban Environm, Xiamen 361021, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2022年 / 114卷

基金：

中国国家自然科学基金;

关键词：

Nitrous acid; Field observation; Winter air pollution; HONO FORMATION; HETEROGENEOUS PRODUCTION; HUMIC-ACID; EMISSIONS; DIOXIDE; IMPACT; CHINA; NO2; PHOTOCHEMISTRY; NITROPHENOLS;

D O I：

10.1016/j.jes.2021.09.010

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The particulate matter (PM) pollution has been significantly improved by carrying out var-ious valid emission control strategies since 2013 in China. Meanwhile the variation trend of nitrous acid (HONO) is worthy to investigate due to its vital role in the atmospheric oxi-dation process. In this study, field observation in the winter is conducted to investigate the concentration of HONO in an urban area of Beijing. In the winter of 2019, the mean HONO concentration is 1.38 ppbV during the whole winter. Photo-enhanced NO2 heterogeneous reactions on the ground and aerosol surfaces were found as the possible daytime sources of HONO. Compared to O-3 , photolysis of HONO dominates the primary OH sources during the winter time. To understand the HONO pollution patterns by years variation, multi-year data is summarized and finds that primary pollutants including CO and NO decreased, but sec-ondary pollutants i.e., HONO (mostly generated via secondary process) increased. Our study highlights the requirement to mitigate secondary pollution by control HONO concentration. (C) 2022 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

引用

页码：334 / 342

页数：9

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