Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 城市与区域生态国家重点实验室

	Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006
	Li, Yushan ; Cao, Junji ; Li, Jianjun ; Zhou, Jiamao ; Xu, Hongmei ; Zhang, Renjian ; Ouyang, Zhiyun
刊名	PARTICUOLOGY
	2013
卷号	11 期号:1 页码:78-85
通讯作者	Cao, JJ
中文摘要	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. (C) 2012 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
收录类别	SCI
WOS记录号	WOS:000315321300012
公开日期	2014-06-04
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7321]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Li, Yushan,Cao, Junji,Li, Jianjun,et al. Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006[J]. PARTICUOLOGY,2013,11(1):78-85.
APA	Li, Yushan.,Cao, Junji.,Li, Jianjun.,Zhou, Jiamao.,Xu, Hongmei.,...&Ouyang, Zhiyun.(2013).Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006.PARTICUOLOGY,11(1),78-85.
MLA	Li, Yushan,et al."Molecular distribution and seasonal variation of hydrocarbons in PM2.5 from Beijing during 2006".PARTICUOLOGY 11.1(2013):78-85.