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Spatial and seasonal variations of PM2.5 mass and species during 2010 in Xi'an, China
Wang, Ping1; Cao, Jun-ji1,3; Shen, Zhen-xing4; Han, Yong-ming2; Lee, Shun-cheng5; Huang, Yu5; Zhu, Chong-shu1; Wang, Qi-yuan1; Xu, Hong-mei4; Huang, Ru-jin6,7
2015-03-01
发表期刊SCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
卷号508页码:477-487
文章类型Article
摘要

PM2.5 mass and selected chemical species are measured in 24-h integrated PM2.5 samples collected simultaneously at the urban and rural regions of Xi'an (six sites in total), China in the four seasons of 2010. The analytes include organic carbon and elemental carbon (OC + EC = total carbon, TC), seven water-soluble inorganic ions (NH4+, K+, Mg2+, Ca2+, Cl-, SO42-, NO3-) and six trace elements (Ti, Mn, Fe, Zn, As, Pb). The average PM2.5 mass for the entire measurement period is 142.6 +/- 102.7 mu g m(-3), which is more than four times that of the Chinese national ambient air quality standard. Spatial variations in PM2.5 mass are not pronounced. The PM2.5 mass and those species measured show a similar seasonal pattern in all six measurement sites, i.e., in the order of winter > autumn > spring > summer. The dominant PM2.5 composition is OC in winter, soil dust in spring, and sulfate, nitrate, and ammonium in summer and autumn. Seasonal variations of TC/PM2.5 and OC/EC ratios follow the PM2.5 changes. Seasonal distributions of (SO42- + NO3- + NH4+)/PM2.5 showed increase in autumn and decrease in winter, while NO3-/SO42- ratios increased in autumn and decreased in summer. Eight main PM2.5 sources are identified based on the positive matrix factorization (PMF) analysis and emissions from fossil fuel combustion (traffic and coal burning) are founded to be the main source responsible for the fine particle pollution in Xi'an. In addition, a decreasing trend in OC/PM2.5 is observed in comparison with previous studies in Xi'an. (C) 2014 Elsevier B.V. All rights reserved.

关键词Xi'an Pm2.5 Air Pollution Pmf
WOS标题词Science & Technology ; Life Sciences & Biomedicine
DOI10.1016/j.scitotenv.2014.11.007
关键词[WOS]Pearl River-delta ; Positive Matrix Factorization ; Fine Particulate Matter ; Organic-carbon Ratio ; Source Apportionment ; Chemical Characteristics ; Elemental Carbon ; Loess Plateau ; Hong-kong ; Southern California
收录类别SCI
语种英语
WOS研究方向Environmental Sciences & Ecology
WOS类目Environmental Sciences
WOS记录号WOS:000349195100051
出版者ELSEVIER SCIENCE BV
引用统计
文献类型期刊论文
条目标识符http://ir.ieecas.cn/handle/361006/9412
专题粉尘与环境研究室
通讯作者Cao, Jun-ji
作者单位1.Chinese Acad Sci, Inst Earth Environm, Key Lab Aerosol Sci & Technol, Xian, Peoples R China
2.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian, Peoples R China
3.Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
4.Xi An Jiao Tong Univ, Dept Environm Sci & Engn, Xian 710049, Peoples R China
5.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China
6.Paul Scherrer Inst, Lab Atmospher Chem, CH-5232 Villigen, Switzerland
7.Natl Univ Ireland Univ Coll Galway, Ryan Inst, Ctr Climate & Air Pollut Studies, Galway, Ireland
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Wang, Ping,Cao, Jun-ji,Shen, Zhen-xing,et al. Spatial and seasonal variations of PM2.5 mass and species during 2010 in Xi'an, China[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2015,508:477-487.
APA Wang, Ping.,Cao, Jun-ji.,Shen, Zhen-xing.,Han, Yong-ming.,Lee, Shun-cheng.,...&Huang, Ru-jin.(2015).Spatial and seasonal variations of PM2.5 mass and species during 2010 in Xi'an, China.SCIENCE OF THE TOTAL ENVIRONMENT,508,477-487.
MLA Wang, Ping,et al."Spatial and seasonal variations of PM2.5 mass and species during 2010 in Xi'an, China".SCIENCE OF THE TOTAL ENVIRONMENT 508(2015):477-487.
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