PAH SOURCE FINGERPRINTS FOR COKE OVENS, DIESEL AND GASOLINE-ENGINES, HIGHWAY TUNNELS, AND WOOD COMBUSTION EMISSIONS

被引:1189
作者
KHALILI, NR [1 ]
SCHEFF, PA [1 ]
HOLSEN, TM [1 ]
机构
[1] UNIV ILLINOIS,SCH PUBL HLTH,CHICAGO,IL 60680
关键词
PAH; SOURCE FINGERPRINT; CHEMICAL MASS BALANCE;
D O I
10.1016/1352-2310(94)00275-P
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
To evaluate the chemical composition (source fingerprint) of the major sources of polyaromatic hydrocarbons (PAHs) in the Chicago metropolitan area, a study of major PAH sources was conducted during 1990-1992. In this study, a modified high-volume sampling method (PS-I sampler) was employed to collect airborne PAHs in both the particulate and gas phases. Hewlett Packard 5890 gas chromatographs equipped with the flame ionization and mass spectrometer detectors (GC/FID and GC/MS) were used to analyze the samples. The sources sampled were: coke ovens, highway vehicles, heavy-duty diesel engines, gasoline engines and wood combustion. Results of this study showed that two and three ring PAHs were responsible for 98, 76, 92, 73 and 80% of the total concentration of measured 20 PAHs for coke ovens, diesel engines, highway tunnels, gasoline engines and wood combustion samples, respectively. Six ring PAHs such as indeno(1,2,3-cd)pyrene and benzo(ghi)perylene were mostly below the detection limit of this study and only detected in the highway tunnel, diesel and gasoline engine samples. The source fingerprints were obtained by averaging the ratios of individual PAH concentrations to the total concentration of categorical pollutants including: (a) total measured mass of PAHs with retention times between naphthalene and coronene, (b) the mass of the 20 PAHs measured in this study, (c) total VOCs, and (d) total PM10. Since concentrations of the above categorical pollutants were different for individual samples and different sources, the chemical composition patterns obtained for each categorical pollutant were different. The source fingerprints have been developed for use in chemical mass balance receptor modeling calculations.
引用
收藏
页码:533 / 542
页数:10
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