Knowledge Management System Of Institute of Earth Environment, CAS
Wintertime nitrate formation pathways in the north China plain: Importance of N2O5 heterogeneous hydrolysis | |
Liu, Lang1,4; Bei, Naifang2; Hu, Bo3; Wu, Jiarui1,4; Liu, Suixin1,4; Li, Xia1,4; Wang, Ruonan1,4; Liu, Zirui3; Shen, Zhenxing2; Li, Guohui1,4 | |
通讯作者 | Li, Guohui(ligh@ieecas.cn) |
2020-11-01 | |
发表期刊 | ENVIRONMENTAL POLLUTION |
ISSN | 0269-7491 |
卷号 | 266页码:10 |
摘要 | Strict emission control measures have been implemented in the North China Plain (NCP) to improve air quality since 2013. However, heavy particulate matter (PM) pollution still frequently occurs in the region especially during wintertime, and the nitrate contribution to fine PM (PM2.5) has substantially increased in recent several years. Nitrate aerosols, which are formed via nitric acid (HNO3) to balance inorganic cations in the particle phase, have become a major fraction of PM2.5 during wintertime haze events in the NCP. HNO3 is mainly produced through homogeneous (NO2+OH, NO3+VOCs) and heterogeneous pathways (N2O5 heterogeneous hydrolysis) in the atmosphere, but the contribution of the two pathways to the nitrate formation remains elusive. In this study, the Weather Research and Forecasting model with Chemistry (WRF-Chem) was applied to simulate a heavy haze episode from 16 to December 31, 2016 in the North China Plain, and the source-oriented method (SOM) and brute force method (BFM) were both used to evaluate contributions of the heterogeneous pathway to the nitrate formation. The results demonstrated that the near-surface nitrate contributions of the heterogeneous pathway were about 30.8% based on the BFM, and 51.6% based on the SOM, indicating that the BFM might be subject to underestimating importance of the heterogeneous pathway to the nitrate formation. The SOM simulations further showed that the heterogeneous pathway dominated the nighttime HNO3 production in the planetary boundary layer, with an average contribution of 83.0%. Although N2O5 was photolytically liable during daytime, the heterogeneous N2O5 hydrolysis still contributed 10.1% of HNO3, which was caused by substantial attenuation of incident solar radiation by clouds and high PM2.5 mass loading. Our study highlighted the significantly important role of N2O5 heterogeneous hydrolysis in the nitrate formation during wintertime haze days. (C) 2020 Elsevier Ltd. All rights reserved. |
DOI | 10.1016/j.envpol.2020.115287 |
关键词[WOS] | WRF-CHEM MODEL ; SECONDARY ORGANIC AEROSOL ; PM10/PM2.5 AIR-QUALITY ; TIANJIN-HEBEI BTH ; SOURCE APPORTIONMENT ; ANTHROPOGENIC EMISSIONS ; PARTICULATE MATTER ; MEXICO-CITY ; REGIONAL-DISTRIBUTION ; NIGHTTIME CHEMISTRY |
收录类别 | SCI ; SCI |
语种 | 英语 |
资助项目 | Strategic Priority Research Program of Chinese Academy of Sciences[XDB40030203] ; National Key R&D Plan (Quantitative Relationship and Regulation Principle) between Regional Oxidation Capacity of Atmospheric and Air Quality[2017YFCO210000] ; National Research Program for Key Issues in Air Pollution Control[DQGG0105] |
WOS研究方向 | Environmental Sciences & Ecology |
项目资助者 | Strategic Priority Research Program of Chinese Academy of Sciences ; National Key R&D Plan (Quantitative Relationship and Regulation Principle) between Regional Oxidation Capacity of Atmospheric and Air Quality ; National Research Program for Key Issues in Air Pollution Control |
WOS类目 | Environmental Sciences |
WOS记录号 | WOS:000571665100003 |
出版者 | ELSEVIER SCI LTD |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://ir.ieecas.cn/handle/361006/15333 |
专题 | 中国科学院地球环境研究所 |
通讯作者 | Li, Guohui |
作者单位 | 1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Chem & Phys, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China 2.Xi An Jiao Tong Univ, Sch Human Settlements & Civil Engn, Xian 710049, Peoples R China 3.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 4.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Lang,Bei, Naifang,Hu, Bo,et al. Wintertime nitrate formation pathways in the north China plain: Importance of N2O5 heterogeneous hydrolysis[J]. ENVIRONMENTAL POLLUTION,2020,266:10. |
APA | Liu, Lang.,Bei, Naifang.,Hu, Bo.,Wu, Jiarui.,Liu, Suixin.,...&Li, Guohui.(2020).Wintertime nitrate formation pathways in the north China plain: Importance of N2O5 heterogeneous hydrolysis.ENVIRONMENTAL POLLUTION,266,10. |
MLA | Liu, Lang,et al."Wintertime nitrate formation pathways in the north China plain: Importance of N2O5 heterogeneous hydrolysis".ENVIRONMENTAL POLLUTION 266(2020):10. |
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