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论文题目: Sources of organic matter (PAHs and n-alkanes) in PM2.5 of Beijing in haze weather analyzed by combining the C-N isotopic and PCA-MLR analyses
全部作者: Guo, Xinyue; Li, Cai; Gao, Yang; Tang, Lei; Briki, Meryem; Ding, Huaijian; Ji, Hongbing
第一作者: Guo, Xinyue
联系作者: JI Hongbing
刊物名称: ENVIRONMENTAL SCIENCE-PROCESSES & IMPACTS
发表年度: 2016
卷: 18
期: 3
页码: 314-322
摘要:
Organic molecular composition and carbon and nitrogen isotope ratios of PM2.5 samples collected in November 2013 were analyzed using gas chromatography/mass spectrometry and isotope ratio mass spectrometry. The samples represented six potential sources and seven sampling sites situated in concentric zones around Beijing under both haze and non-haze conditions. Our results showed that the average concentrations of polycyclic aromatic hydrocarbons (PAHs) and n-alkanes were 258.2 +/- 208.8 ng m(-3) and 499.5 +/- 347.8 ng m(-3), while the delta C-13 and delta N-15 values for PM2.5 varied from -26.29 to -25.26 parts per thousand and from 8.68 to 14.50 parts per thousand with an average of -25.70 +/- 0.3 parts per thousand and 11.97 +/- 1.79 parts per thousand, respectively. The highest concentrations of PAHs and n-alkanes were recorded in the sixth ring road, with the lowest ones in the third ring road. Concentrations of PAHs during haze were higher than during non-haze conditions, while concentrations of n-alkanes were not markedly different. Principal component analysis/multiple linear regression analyses indicated that the main sources of PAHs were vehicle and coal combustion emissions, while n-alkanes had high contributions from petroleum emissions. These sources were supported by isotopic analyses. Thus, the main sources of organic matter contributing to haze in Beijing were coal combustion and vehicle emissions. Such results provide guidance towards managing haze in Beijing. 
论文链接: http://pubs.rsc.org/en/Content/ArticleLanding/2016/EM/C6EM00037A#!divAbstract