Highly time-resolved characterization of water-soluble inorganic ions in PM2.5 in a humid and acidic mega city in Sichuan Basin, China | |
Tian, Mi1; Wang, HuanBo1; Chen, Yang1; Zhang, LeiMing2; Shi, GuangMing1; Liu, Yuan1; Yu, JiaYan3; Zhai, ChongZhi3; Wang, Jun3; Yang, FuMo1,4,5 | |
刊名 | SCIENCE OF THE TOTAL ENVIRONMENT |
2017-02-15 | |
卷号 | 580页码:224-234 |
关键词 | High Time Resolution Water-soluble Ions Particle Acidity Formation Mechanism |
ISSN号 | 0048-9697 |
DOI | 10.1016/j.scitotenv.2016.12.048 |
英文摘要 | To investigate the characteristics of water-soluble inorganic ions (WSIIs) in Chongqing, a well-known foggy and acid region in southwestern China, hourly real-time concentrations of five cations (Na+, K+, Ca2+, and Mg2+) and six anions (F-, Cr-, NO2-, NO3-, PO43-, and SO42-) in PM2,5 during winter (from Dec. 18, 2015 to Mar. 20, 2016) in Chongqing were collected by applying In-situ Gas and Aerosol Compositions Monitor. The hourly total concentration of WSIIs was 38.5 mu g/m(3) on average, accounting for 57% of PMz5 mass concentration. Secondary inorganic aerosols (NH4+, NO3-, and SO42-) were dominant WSIIs, accounting for 91% of WSIIs mass. Compared to ten years ago, SO42- concentrations were decreased by 31% but NO3- levels were doubled, likely indicative of sharply enhanced contribution to fine particle pollution from mobile sources over stationary sources. NO3- originated from the current fluxes of NH3 and HNO3 onto sulfate particles and/or from in-cloud processes were critical pathways under humid conditions in the study area. Water content and/or RH might be important factors controlling nitrate formation. Trajectory analysis manifested that aerosol pollutions in Chongqing were mostly caused by local emissions. (C) 2016 Elsevier B.V. All rights reserved. |
WOS研究方向 | Environmental Sciences & Ecology |
语种 | 英语 |
出版者 | ELSEVIER SCIENCE BV |
WOS记录号 | WOS:000395353600023 |
内容类型 | 期刊论文 |
源URL | [http://119.78.100.138/handle/2HOD01W0/3516] |
专题 | 大气环境研究中心 |
作者单位 | 1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Res Ctr Atmospher Environm, Chongqing 400714, Peoples R China 2.Environm & Climate Change Canada, Air Qual Res Div, Sci Technol Branch, Toronto, ON M3H 5T4, Canada 3.Chongqing Environm Monitoring Ctr, Chongqing 401147, Peoples R China 4.Chinese Acad Sci, Inst Urban Environm, Ctr Excellence Reg Atmospher Environm, Xiamen 361021, Peoples R China 5.Yangtze Normal Univ, Chongqing 408100, Peoples R China |
推荐引用方式 GB/T 7714 | Tian, Mi,Wang, HuanBo,Chen, Yang,et al. Highly time-resolved characterization of water-soluble inorganic ions in PM2.5 in a humid and acidic mega city in Sichuan Basin, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2017,580:224-234. |
APA | Tian, Mi.,Wang, HuanBo.,Chen, Yang.,Zhang, LeiMing.,Shi, GuangMing.,...&Yang, FuMo.(2017).Highly time-resolved characterization of water-soluble inorganic ions in PM2.5 in a humid and acidic mega city in Sichuan Basin, China.SCIENCE OF THE TOTAL ENVIRONMENT,580,224-234. |
MLA | Tian, Mi,et al."Highly time-resolved characterization of water-soluble inorganic ions in PM2.5 in a humid and acidic mega city in Sichuan Basin, China".SCIENCE OF THE TOTAL ENVIRONMENT 580(2017):224-234. |
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