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Distributions and sources of n-alkanes in PM2.5 at urban, industrial and coastal sites in Tianjin, China
Alternative TitleDistributions and sources of n-alkanes in PM 2.5 at urban, industrial and coastal sites in Tianjin, China
Li Weifang1; Peng Yue3; Bai Zhipeng1
2010
Source PublicationJOURNAL OF ENVIRONMENTAL SCIENCES
ISSN1001-0742
Volume22Issue:10Pages:1551-1557
AbstractAliphatic 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.
Other AbstractAliphatic 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
KeywordPOLYCYCLIC 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
Indexed ByCSCD
Language英语
Funding Project[Commonweal Project of National Environment Protection] ; [National Basic Research Program (973) of China]
CSCD IDCSCD:4036700
Citation statistics
Cited Times:4[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/154229
Collection中国科学院金属研究所
Affiliation1.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
Recommended Citation
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.
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