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PM2.5 from the Guanzhong Plain: Chemical composition andimplications for emission reductions
Niu,XY(Niu,Xinyi)[1,2]; Cao,JJ(Cao,Junji)[2,3,4]; Shen,ZX(Shen,Zhenxing)[5]; Ho,SSH(Ho,Steven Sai Hang)[2,6]; Tie,XX(Tie,Xuexi)[2,3 7]; Zhao,SY(Zhao,Shuyu)[2,3]; Xu,HM(Xu,Hongmei)[5,2]; Zhang,T(Zhang,Ting)[2,3]; Huang,RJ(Huang,Rujin)[2,3]
2016-12
Source PublicationAtmospheric Environment
Volume147Issue:2016Pages:458-469
Subtype期刊论文
Abstract

Atmospheric particulate matter (PM) affects important environmental issues including air quality, regional and global climates, and human health. A one-year sampling campaign for PM2.5 was conducted at six locations in Guanzhong Plain, including the cities of Xi'an, Weinan and Baoji, from March 2012 to March 2013. The 24-h average PM2.5 mass concentration was 134.7 mg m 3, that substantially exceeds the National Ambient Air Quality Standard level of 35 mg m 3. The highest loadings of both organic and elemental carbon (OC and EC) occurred in winter: EC co-varied with OC but showed less variability, presumably due to more stable emissions. The greatest contributions of secondary inorganic ions (SO4 2 , NO3 and NH4 þ) to the total quantified ions also were seen in winter, presumably due to gaseous precursors from coal combustion and biomass burning. Two high PM episodes occurred, one in the autumn and the other in winter. During the autumn episode, regional pollution from biomass burning raised the concentrations of secondary ions while coal combustion was a strong influence during the winter episode. Modeling simulations suggest that the control measures on both primary emissions and secondary aerosol precursors including SO2, NOx, and NH3 are needed to reduce the PM levels of the region.

KeywordAir pollution Guanzhong plain Episode Secondary aerosol Emission reduction
DOI10.1016/j.atmosenv.2016.10.029
Indexed BySCI
Language英语
Citation statistics
Cited Times:14[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10832
Collection粉尘与环境研究室
Affiliation1.School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, 710049, China;
2.Key Lab of Aerosol Chemistry & Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China;
3.State Key Lab of Loess and Quaternary Geology (SKLLQG), Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China;
4.Institute of Global Environmental Change, Xi'an Jiaotong University, Xi'an, 710049, China;
5.Department of Environmental Science and Engineering, Xi'an Jiaotong University, Xi'an, 710049, China;
6.Division of Atmospheric Sciences, Desert Research Institute, Reno, NV, 89512, United Statesg National Center for Atmospheric Research, Boulder, CO, USA
Recommended Citation
GB/T 7714
Niu,XY,Cao,JJ,Shen,ZX,et al. PM2.5 from the Guanzhong Plain: Chemical composition andimplications for emission reductions[J]. Atmospheric Environment,2016,147(2016):458-469.
APA Niu,XY.,Cao,JJ.,Shen,ZX.,Ho,SSH.,Tie,XX.,...&Huang,RJ.(2016).PM2.5 from the Guanzhong Plain: Chemical composition andimplications for emission reductions.Atmospheric Environment,147(2016),458-469.
MLA Niu,XY,et al."PM2.5 from the Guanzhong Plain: Chemical composition andimplications for emission reductions".Atmospheric Environment 147.2016(2016):458-469.
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