Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China

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	Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China
	Li Weifang 3; Peng Yue 1; Bai Zhipeng 3
刊名	JOURNAL OF ENVIRONMENTAL SCIENCES
	2010
卷号	22 期号:10 页码:1551-1557
关键词	POLYCYCLIC AROMATIC-HYDROCARBONS AIR-POLLUTION SOURCES ORGANIC AEROSOL PARTICULATE MATTER MOLECULAR COMPOSITION SOURCE APPORTIONMENT TRACERS PHASE ATMOSPHERE COMPONENTS PM2.5 n-alkanes distribution pattern CPIs plant wax
ISSN号	1001-0742
其他题名	Distributions and sources of n-alkanes in PM 2.5 at urban, industrial and coastal sites in Tianjin, China
英文摘要	Aliphatic hydrocarbons (n-alkanes) associated with fine particulate matter were determined in the ambient air of urban, industrial and coastal areas in Tianjin, China, where intensive coal burning for industrial and domestic purpose takes place. n-Alkane homologues from C12 to C35 were quantifiable in all samples with C20-C31 being the most abundant species. Average concentrations of the total n-alkanes were 148.7, 250.1 and 842.0 ng/m(3) in July, April and January, respectively. Seasonal variations were mainly attributed to ambient temperature changes and coal combustion for residential heating. Among the three studied areas, the highest levels of n-alkanes were observed in the industrial complex in winter and spring, but in summer the coastal alkane concentration moved up to the highest. A mono-modal distribution for n-alkanes was observed in spring and summer with odd carbon number predominance and a maximum centered at C27-C31, suggesting the release of plant wax into the atmosphere. The bimodal distribution with maxima at C22 and C26 observed in winter indicated a substantial influence of fossil fuel sources. All the CPIs (CPI1, CPI2, CPI3) values, varying between 0.64 and 1.97, indicated the influence of anthropogenic emissions on fine organic aerosols. The estimated contributions of plant wax to total n-alkanes were on average of 12.9%, 19.1% and 26.1% for winter, spring and summer, respectively.
资助项目	[Commonweal Project of National Environment Protection] ; [National Basic Research Program (973) of China]
语种	英语
CSCD记录号	CSCD:4036700
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/154228]
专题	金属研究所_中国科学院金属研究所
作者单位	1.中国科学院金属研究所 2.Tianjin Acad Environm Protect Science, Tianjin 300191, Peoples R China 3.南开大学
推荐引用方式 GB/T 7714	Li Weifang,Peng Yue,Bai Zhipeng. Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China[J]. JOURNAL OF ENVIRONMENTAL SCIENCES,2010,22(10):1551-1557.
APA	Li Weifang,Peng Yue,&Bai Zhipeng.(2010).Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China.JOURNAL OF ENVIRONMENTAL SCIENCES,22(10),1551-1557.
MLA	Li Weifang,et al."Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China".JOURNAL OF ENVIRONMENTAL SCIENCES 22.10(2010):1551-1557.