Characterization of water soluble inorganic ions and their evolution processes during PM2.5 pollution episodes in a small city in southwest China

doi:10.1016/j.scitotenv.2018.09.376

	Characterization of water soluble inorganic ions and their evolution processes during PM2.5 pollution episodes in a small city in southwest China
	Qiao, Baoqing 1,4; Chen, Yang1 ; Tian, Mi 1; Wang, Huanbo 1,2; Yang, Fumo1,3 ; Shi, Guangming 3; Zhang, Leiming 5; Peng, Chao 1; Luo, Qiong 1; Ding, Shimin 6
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-02-10
卷号	650 页码:2605-2613
关键词	Water soluble inorganic ions PM2.5 Pollution episodes Sichuan Basin
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2018.09.376
通讯作者	Wang, Huanbo(hbwang@swust.edu.cn)
英文摘要	PM2.5 samples were collected in four segregate one-month periods, each representing one season, for analyzing their contents of water soluble inorganic ions (WSIIs) in a small city inside Sichuan Basin. Daily PM2.5 concentrations ranged from 23.2 to 203.1 mu g m(-3) with an annual mean of 66.9 +/- 33.6 mu g m(-3). Annual mean concentrations of WSIIs was 28.8 +/- 20.3 mu g m(-3), accounting for 43.1% of PM2.5. Seasonal mean concentrations of WSIIs ranged from 17.5 +/- 9.3 mu g m(-3) in summer to 46.5 +/- 27.6 mu g m(-3) in winter. Annual mean mass ratio of NO3-/SO42- was 0.49, demonstrating predominant stationary sources for secondary inorganic aerosols (SNA, including SO42-, NH4+ and NO3-); whereas annual mean molar ratio of [NH4+]/[NO3-] was 3.5, suggesting dominant agriculture emissions contributing to the total nitrogen. During a severe and long-lasting (13 days) winter pollution period when mean PM2.5 concentration reached to 132.5 mu g m(-3), PM2.5 concentration was enhanced by a factor of 2.6 while that of SNA by a factor of 2.9 compared to those before the pollution event, and the fraction of SNA in PM2.5 only increased slightly (from 46.7% to 50.6%). Thus, local accumulation of pollutants under poor diffusion conditions played a major role causing the extremely high PM2.5 concentration, besides the contributions from the enhanced SNA formation under specific weather conditions. Crown Copyright (C) 2018 Published by Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41405027] ; National Natural Science Foundation of China[41375123] ; National Key R&D Program of China[2016YFC0200400] ; Strategic Priority Research Program of Chinese Academy of Sciences[KJZD-EW-TZ-G06] ; Chongqing Science and Technology Commission[cstkjcxljrc13]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000447871400089
内容类型	期刊论文
源URL	[http://119.78.100.138/handle/2HOD01W0/6887]
专题	中国科学院重庆绿色智能技术研究院
通讯作者	Wang, Huanbo
作者单位	1.Chinese Acad Sci, Chongqing Inst Green & Intelligent Technol, Chongqing 400714, Peoples R China 2.Southwest Univ Sci & Tech, Sch Environm & Resource, Mianyang 621010, Peoples R China 3.Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Sichuan, Peoples R China 4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 5.Environm & Climate Change Canada, Air Qual Res Div, Sci & Technol Branch, Toronto, ON M3H 5T4, Canada 6.Yangtze Normal Univ, Coordinated Ctr Excellence Green Dev Wuling Reg, Chongqing 408100, Peoples R China
推荐引用方式 GB/T 7714	Qiao, Baoqing,Chen, Yang,Tian, Mi,et al. Characterization of water soluble inorganic ions and their evolution processes during PM2.5 pollution episodes in a small city in southwest China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,650:2605-2613.
APA	Qiao, Baoqing.,Chen, Yang.,Tian, Mi.,Wang, Huanbo.,Yang, Fumo.,...&Ding, Shimin.(2019).Characterization of water soluble inorganic ions and their evolution processes during PM2.5 pollution episodes in a small city in southwest China.SCIENCE OF THE TOTAL ENVIRONMENT,650,2605-2613.
MLA	Qiao, Baoqing,et al."Characterization of water soluble inorganic ions and their evolution processes during PM2.5 pollution episodes in a small city in southwest China".SCIENCE OF THE TOTAL ENVIRONMENT 650(2019):2605-2613.