Source Apportionment of Urban Particulate Aliphatic and Polynuclear Aromatic Hydrocarbons (PAHs) Using Multivariate Methods

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• 作者：Ilias G. Kavouras ; Petros Koutrakis ; Manolis Tsapakis ; Evaggelia Lagoudaki ; Euripides G. Stephanou ; Dietrich Von Baer ; and Pedro Oyola
• 刊名：Environmental Science & Technology
• 出版年：2001
• 出版时间：June 1, 2001
• 年：2001
• 卷：35
• 期：11
• 页码：2288 - 2294
• 全文大小：83K
• 年卷期：v.35,no.11(June 1, 2001)
• ISSN：1520-5851

文摘

Samples of organic aerosol were collected in Santiago deChile. An activated-charcoal diffusion denuder wasused to strip out organic vapors prior to particle collection.Both polynuclear aromatic hydrocarbons (PAHs) andaliphatic hydrocarbons were determined using gaschromatography/mass spectrometry (GC/MS). Organicparticle sources were resolved using both concentrationdiagnostic ratios and multivariate methods such ashierarchical cluster analysis (HCA) and factor analysis(FA). Four factors were identified based on the loadingsof PAHs and n-alkanes and were attributed to the followingsources: (1) high-temperature combustion of fuels; (2)fugitive emissions from oil residues; (3) biogenic sources;and (4) unburned fuels. Multilinear regression (MLR)analysis was used to determine emission profiles andcontributions of the sources. The reconstructed concentrations of particle phase aliphatic and polynuclear aromatichydrocarbons were in good agreement (R² > 0.70) withthose measured in Santiago de Chile.