中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Increasing importance of nitrate formation for heavy aerosol pollution in two megacities in Sichuan Basin, southwest China

文献类型:期刊论文

作者Tian, Mi1,8; Liu, Yuan8; Yang, Fumo7,8; Zhang, Leiming6; Peng, Chao8; Chen, Yang8; Shi, Guangming7; Wang, Huanbo5; Luo, Bin4; Jiang, Changtan3
刊名ENVIRONMENTAL POLLUTION
出版日期2019-07-01
卷号250页码:898-905
ISSN号0269-7491
关键词Fine particulate matter Secondary inorganic aerosols Chemical transformation Haze formation
DOI10.1016/j.envpol.2019.04.098
通讯作者Yang, Fumo(fmyang@scu.edu.cn)
英文摘要Secondary inorganic aerosols, including sulfate, nitrate, and ammonium contribute to a large extent to the severe haze pollution events in China. Understanding their formation mechanisms is critical for designing effective mitigation strategies to control haze pollution, especially as the role of nitrate seemed to become more important recently, especially in some megacities. In the present study, simultaneous observations were conducted in two megacities (Chengdu and Chongqing) in Sichuan Basin of southwest China, one of the regions suffering from severe aerosol pollution. One typical long-lasting pollution event in Chengdu and Chongqing was captured during wintertime from December 25, 2016 to January 5, 2017. The campaign-average of hourly concentrations of PM2.5, sulfate, and nitrate, measured by an Aerosol Analyzer (ZSF) were 101 +/- 73.8 mu g/m(3), 15.9 +/- 11.8 mu g/m(3), and 24.9 +/- 20.6 mu g/m(3), respectively, in Chengdu, and were 87.7 +/- 53.8 mu g/m(3), 19.7 +/- 13.5 mu g/m(3), and 15.1 +/- 10.1 mu g/m(3), respectively, in Chongqing. Nitrate contributed substantially to PM2.5 pollution when PM2.5 was lower than 150 mu g/m(3), largely due to the strong secondary transformation of NOx to nitrate during the occurrence of the pollution episode. Heterogeneous hydrolysis of N2O5 dominated nitrate formation during nighttime, while photochemical reactions and high-RH enhanced gas- to aqueous-phase dissolution of NH3 and HNO3 or cloud processes likely played important roles for nitrate formation during daytime. RH-dependent heterogeneous reactions contributed greatly to the formation of sulfate. NOx is confirmed to play an important role as an oxidant in accelerating the secondary transformation of SO2 to sulfate at high RH and low O-3 levels under neutralization condition during heavy PM2.5 pollution episode. Results from this study identified the formation mechanism of nitrate, especially during the daytime, and addressed the importance of heterogeneous inorganic reactions in the formation of heavy aerosol pollution events. Crown Copyright (C) 2019 Published by Elsevier Ltd. All rights reserved.
资助项目National Natural Science Foundation of China[41875162] ; National Natural Science Foundation of China[41773148] ; National Natural Science Foundation of China[41403089] ; National Natural Science Foundation of China[41375123] ; National Key R&D Program of China[2016YFC0200405] ; National Key R&D Program of China[2018YFC0214001] ; Sichuan Science and Technology Program[2018SZDZX0023] ; Sichuan Science and Technology Program[2018SZ0316] ; Youth Innovation Promotion Association CAS[2014349]
WOS研究方向Environmental Sciences & Ecology
语种英语
出版者ELSEVIER SCI LTD
WOS记录号WOS:000471088200096
源URL[http://119.78.100.138/handle/2HOD01W0/8206]  
专题大气环境研究中心
通讯作者Yang, Fumo
作者单位1.Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400044, Peoples R China
2.Fuji Elect Co Ltd, Tokyo 1918502, Japan
3.Chongqing Environm Monitoring Ctr, Chongqing 401147, Peoples R China
4.Sichuan Environm Monitoring Ctr, Chengdu 610041, Sichuan, Peoples R China
5.Southwest Univ Sci & Technol, Sch Environm & Resource, Mianyang 621010, Sichuan, Peoples R China
6.Environm & Climate Change Canada, Sci Technol Branch, Air Qual Res Div, Toronto, ON M3H 5T4, Canada
7.Sichuan Univ, Dept Environm Sci & Engn, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, Sichuan, Peoples R China
8.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Atmospher Environm, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714
Tian, Mi,Liu, Yuan,Yang, Fumo,et al. Increasing importance of nitrate formation for heavy aerosol pollution in two megacities in Sichuan Basin, southwest China[J]. ENVIRONMENTAL POLLUTION,2019,250:898-905.
APA Tian, Mi.,Liu, Yuan.,Yang, Fumo.,Zhang, Leiming.,Peng, Chao.,...&Koizumi, Kazuhiro.(2019).Increasing importance of nitrate formation for heavy aerosol pollution in two megacities in Sichuan Basin, southwest China.ENVIRONMENTAL POLLUTION,250,898-905.
MLA Tian, Mi,et al."Increasing importance of nitrate formation for heavy aerosol pollution in two megacities in Sichuan Basin, southwest China".ENVIRONMENTAL POLLUTION 250(2019):898-905.

入库方式: OAI收割

来源:重庆绿色智能技术研究院

浏览0
下载0
收藏0
其他版本

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。