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Characteristics, Formation Mechanisms and Potential Transport Pathways of PM2.5 at a Rural Background Site in Chongqing, Southwest China

文献类型：期刊论文

作者Peng, Chao6,7; Tian, Mi1,7; Chen, Yang7; Wang, Huanbo7; Zhang, Leiming5; Shi, Guangming4,7; Liu, Yuan7; Yang, Fumo3,4,7; Zhai, Chongzhi2
刊名AEROSOL AND AIR QUALITY RESEARCH
出版日期2019-09-01
卷号19期号:9页码:1980-1992
关键词PM2.5 Rural background site Chemical transformation Potential transport pathways
ISSN号1680-8584
DOI10.4209/aaqr.2019.01.0010
通讯作者Tian, Mi(tianmi628@cqu.edu.cn) ; Yang, Fumo(fmyang@scu.edu.cn)
英文摘要Daily PM2.5 samples were collected at a rural background station (JinYun) located in Chongqing across four consecutive seasons from October 2014 to July 2015. The major water-soluble inorganic ions (WSIIs), organic carbon (OC) and elemental carbon (EC) were analyzed, and their chemical characteristics, transport pathways and potential source regions were investigated. The average annual PM2.5 concentration was 56.2 +/- 31.0 mu g m(-3), of which secondary inorganic aerosol (SNA) and carbonaceous aerosols composed 41.0% and 29.4%, respectively. Higher concentrations of and contributions from SO42-, which were likely caused by the secondary transformation of SO2 into SO42-, were observed in summer than in autumn and spring. Additionally, transportation from the urban area of Chongqing (Yubei) played an important role in elevating the SO42- during this season. Although the accumulation of PM2.5 during pollution episodes in winter was also due to aqueous-phase reactions, based on the entire year, NO3- formation may have been primarily driven by homogeneous gas-phase reactions. Furthermore, the aerosol environment was ammonium-rich, and NH4+ formation promoted the production of NO3- at lower temperatures. The carbonaceous component, which consisted of 81.0-84.6% OC, exhibited higher concentrations in winter than in the other seasons; 50.0-77.2% of the total OC, in turn, was contributed by primary organic carbon (POC). Potential source contribution function (PSCF) analysis suggests that the site was mainly affected by regional pollution originating in the southwestern and northern areas of Chongqing.
资助项目National Natural Science Foundation of China[41405027] ; National Natural Science Foundation of China[41375123] ; National Natural Science Foundation of China[41773148] ; National Natural Science Foundation of China[41403089] ; Strategic Priority Research Program of the Chinese Academy of Sciences[KJZD-EW-TZ-G06] ; Chongqing Science and Technology Commission[cstc2014yykfC20003] ; Chongqing Science and Technology Commission[cstckjcxljrc13]
WOS研究方向Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000484060600003
出版者TAIWAN ASSOC AEROSOL RES-TAAR
源URL[http://119.78.100.138/handle/2HOD01W0/9605]  
专题大气环境研究中心
通讯作者Tian, Mi; Yang, Fumo
作者单位1.Chongqing Univ, Sch Urban Construct & Environm Engn, Chongqing 400044, Peoples R China
2.Chongqing Acad Environm Sci, Chongqing 401147, Peoples R China
3.Sichuan Univ, Inst New Energy & Low Carbon Technol, Chengdu 610065, Sichuan, Peoples R China
4.Sichuan Univ, Coll Architecture & Environm, Natl Engn Res Ctr Flue Gas Desulfurizat, Chengdu 610065, Sichuan, Peoples R China
5.Air Qual Res Div, Sci & Technol Branch, Environm & Climate Change Canada, Toronto, ON, Canada
6.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
7.Chinese Acad Sci, Res Ctr Atmospher Environm, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China
推荐引用方式
GB/T 7714		 Peng, Chao,Tian, Mi,Chen, Yang,et al. Characteristics, Formation Mechanisms and Potential Transport Pathways of PM2.5 at a Rural Background Site in Chongqing, Southwest China[J]. AEROSOL AND AIR QUALITY RESEARCH,2019,19(9):1980-1992.
APA Peng, Chao.,Tian, Mi.,Chen, Yang.,Wang, Huanbo.,Zhang, Leiming.,...&Zhai, Chongzhi.(2019).Characteristics, Formation Mechanisms and Potential Transport Pathways of PM2.5 at a Rural Background Site in Chongqing, Southwest China.AEROSOL AND AIR QUALITY RESEARCH,19(9),1980-1992.
MLA Peng, Chao,et al."Characteristics, Formation Mechanisms and Potential Transport Pathways of PM2.5 at a Rural Background Site in Chongqing, Southwest China".AEROSOL AND AIR QUALITY RESEARCH 19.9(2019):1980-1992.

入库方式： OAI收割

来源：重庆绿色智能技术研究院

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