NDLI: Chemical composition of PM2.5 at an urban site of Chengdu in southwestern China

Content Provider	Springer Nature Link
Author	Tao, Jun Cheng, Tiantao Zhang, Renjian Cao, Junji Zhu, Lihua Wang, Qiyuan Luo, Lei Zhang, Leiming
Copyright Year	2013
Abstract	PM2.5 aerosols were sampled in urban Chengdu from April 2009 to January 2010, and their chemical compositions were characterized in detail for elements, water soluble inorganic ions, and carbonaceous matter. The annual average of PM2.5 was 165 μg m−3, which is generally higher than measurements in other Chinese cities, suggesting serious particulate pollution issues in the city. Water soluble ions contributed 43.5% to the annual total PM2.5 mass, carbonaceous aerosols including elemental carbon and organic carbon contributed 32.0%, and trace elements contributed 13.8%. Distinct daily and seasonal variations were observed in the mass concentrations of PM2.5 and its components, reflecting the seasonal variations of different anthropogenic and natural sources. Weakly acidic to neutral particles were found for PM2.5. Major sources of PM2.5 identified from source apportionment analysis included coal combustion, traffic exhaust, biomass burning, soil dust, and construction dust emissions. The low nitrate: sulfate ratio suggested that stationary emissions were more important than vehicle emissions. The reconstructed masses of ammonium sulfate, ammonium nitrate, particulate carbonaceous matter, and fine soil accounted for 79% of the total measured PM2.5 mass; they also accounted for 92% of the total measured particle scattering.
Starting Page	1070
Ending Page	1084
Page Count	15
File Format	PDF
ISSN	02561530
Journal	Advances in Atmospheric Sciences
Volume Number	30
Issue Number	4
e-ISSN	18619533
Language	English
Publisher	SP Science Press
Publisher Date	2013-06-18
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	water soluble ions carbonaceous matters trace elements enrichment factor source apportionment mass closure Atmospheric Sciences Meteorology Geophysics/Geodesy
Content Type	Text
Resource Type	Article
Subject	Atmospheric Science

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