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

IMR OpenIR

	Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China
其他题名	Distributions and sources of n-alkanes in PM 2.5 at urban, industrial and coastal sites in Tianjin, China
	Li Weifang 1; Peng Yue 3; Bai Zhipeng 1
	2010
发表期刊	JOURNAL OF ENVIRONMENTAL SCIENCES
ISSN	1001-0742
卷号	22 期号:10 页码:1551-1557
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.
其他摘要	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/m3 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
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
收录类别	CSCD
语种	英语
资助项目	[Commonweal Project of National Environment Protection] ; [National Basic Research Program (973) of China]
CSCD记录号	CSCD:4036700
引用统计	被引频次：6[CSCD] [CSCD记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/154229
专题	中国科学院金属研究所
作者单位	1.南开大学 2.Tianjin Acad Environm Protect Science, Tianjin 300191, Peoples R China 3.中国科学院金属研究所
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.