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Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006
Li, YS (Li, Yushan)[ 1,2 ]; Cao, JJ (Cao, Junji)[ 3,4 ]; Li, JJ (Li, Jianjun)[ 3 ]; Zhou, JM (Zhou, Jiamao)[ 3 ]; Xu, HM (Xu, Hongmei)[ 3 ]; Zhang, RJ (Zhang, Renjian)[ 5 ]; Ouyang, ZY (Ouyang, Zhiyun)[ 1 ]
2013-02-28
Source PublicationPARTICUOLOGY
Volume11Issue:1(SI)Pages:78-85
Subtype期刊论文
Abstract

Normal (n)-alkanes and polycyclic aromatic hydrocarbons (PAHs) in PM2.5 were collected from Beijing in 2006 and analyzed using a thermal desorption-GC/MS technique. Annual average concentrations of n-alkanes and PAHs were 282 +/- 96 and 125 +/- 150 ng/m(3), respectively: both were highest in winter and lowest in summer. C-19-C-25 compounds dominated the n-alkanes while benzo[b]fluoranthene, benzo[e]pyrene, and phenanthrene were the most abundant PAHs. The n-alkanes exhibited moderate correlations with organic carbon (OC) and elemental carbon (EC) throughout the year, but the relationships between the PAHs, OC and EC differed between the heating and non-heating seasons. The health risks associated with PAHs in winter were more than 40 times those in spring and summer even though the PM2.5 loadings were comparable. Carbon preference index values (<1.5) indicated that the n-alkanes were mostly from fossil fuel combustion. The ratios of indeno[123-cd]pyrene to benzo[ghi]pyrelene in summer and spring were 0.58 +/- 0.12 and 0.63 +/- 0.09, respectively, suggesting that the PAHs mainly originated from motor vehicles, but higher ratios in winter reflected an increased influence from coal, which is extensively burned for domestic heating. A comprehensive comparison showed that PAH pollution in Beijing has decreased in the past 10 years.

KeywordPm2.5 Normal Alkanes (n-Alkanes) Polycyclic Aromatic Hydrocarbons (Pahs) Air Pollution Beijing
DOI10.1016/j.partic.2012.09.002
Indexed BySCI ; EI
Language英语
Citation statistics
Cited Times:17[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ieecas.cn/handle/361006/9946
Collection粉尘与环境研究室
Corresponding AuthorCao, JJ (Cao, Junji)[ 3,4 ]
Affiliation1.Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Key Laboratory of Aerosol Science & Technology, SKLLQG, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an, China;
4.Institute of Global Environmental Change, Xi’an Jiaotong University, Xi’an, China;
5.Key Laboratory of Regional Climate-Environment Research for Temperate East Asia (RCE-TEA), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China
Recommended Citation
GB/T 7714
Li, YS ,Cao, JJ ,Li, JJ ,et al. Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006[J]. PARTICUOLOGY,2013,11(1(SI)):78-85.
APA Li, YS .,Cao, JJ .,Li, JJ .,Zhou, JM .,Xu, HM .,...&Ouyang, ZY .(2013).Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006.PARTICUOLOGY,11(1(SI)),78-85.
MLA Li, YS ,et al."Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006".PARTICUOLOGY 11.1(SI)(2013):78-85.
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