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Chemical Composition of PM(10) and PM(2.5) Collected at Ground Level and 100 Meters during a Strong Winter-Time Pollution Episode in Xi'an, China
Shen, ZX (Shen, Zhenxing)[1,2]; Cao, JJ (Cao, Junji)[1,2]; Liu, SX (Liu, Suixin)[2]; Zhu, CS (Zhu, Chongshu)[2]; Wang, X (Wang, Xin)[1]; Zhang, T (Zhang, Ting)[2]; Xu, HM (Xu, Hongmei)[2]; Hu, TF (Hu, Tafeng)[2]
2011-11-30
Source PublicationJOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION
Volume61Issue:11(SI)Pages:1150-1159
Subtype期刊论文
Abstract

An intensive sampling of aerosol particles from ground level and 100 m was conducted during a strong pollution episode during the winter in Xi'an, China. Concentrations of water-soluble inorganic ions, carbonaceous compounds, and trace elements were determined to compare the composition of particulate matter (PM) at the two heights. PM mass concentrations were high at both stations: PM(10) (PM with aerodynamic diameter <= 10 mu m) exceeded the China National Air Quality Standard Class II value on three occasions, and PM(2.5) (PM with aerodynamic diameter <= 2.5 mu m) exceeded the daily U.S. National Ambient Air Quality Standard more than 10 times. The PM(10) organic carbon (OC) and elemental carbon (EC) were slightly lower at the ground than at 100 m, both in terms of concentration and percentage of total mass, but OC and EC in PM(2.5) exhibited the opposite pattern. Major ionic species, such as sulfate and nitrate, showed vertical variations similar to the carbonaceous aerosols. High sulfate concentrations indicated that coal combustion dominated the PM mass both at the ground and 100 m. Correlations between K(+) and OC and EC at 100 m imply a strong influence from suburban biomass burning, whereas coal combustion and motor vehicle exhaust had a greater influence on the ground PM. Stable atmospheric conditions apparently led to the accumulation of PM, especially at 100 m, and these conditions contributed to the similarities in PM at the two elevations. Low coefficient of divergence (CD) values reflect the similarities in the composition of the aerosol between sites, but higher CDs for fine particles compared with coarse ones were consistent with the differences in emission sources between the ground and 100 m.

DOI10.1080/10473289.2011.608619
Indexed BySCI
Language英语
Citation statistics
Cited Times:45[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/10312
Collection粉尘与环境研究室
Corresponding AuthorShen, ZX (Shen, Zhenxing)[1,2]
Affiliation1.Department of Environmental Science and Engineering, Xi’an Jiaotong University, Xi’an, People’s Republic ofChina;
2.SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, People’s Republicof China
Recommended Citation
GB/T 7714
Shen, ZX ,Cao, JJ ,Liu, SX ,et al. Chemical Composition of PM(10) and PM(2.5) Collected at Ground Level and 100 Meters during a Strong Winter-Time Pollution Episode in Xi'an, China[J]. JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION,2011,61(11(SI)):1150-1159.
APA Shen, ZX .,Cao, JJ .,Liu, SX .,Zhu, CS .,Wang, X .,...&Hu, TF .(2011).Chemical Composition of PM(10) and PM(2.5) Collected at Ground Level and 100 Meters during a Strong Winter-Time Pollution Episode in Xi'an, China.JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION,61(11(SI)),1150-1159.
MLA Shen, ZX ,et al."Chemical Composition of PM(10) and PM(2.5) Collected at Ground Level and 100 Meters during a Strong Winter-Time Pollution Episode in Xi'an, China".JOURNAL OF THE AIR & WASTE MANAGEMENT ASSOCIATION 61.11(SI)(2011):1150-1159.
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