Indoor and outdoor concentrations of organic and inorganic molecular markers: Source apportionment of PM_2.5 using low-volume samples

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• 作者：David A. Olson ; John Turlington ; Rachelle M. Duvall ; Stephen R. McDow ; Carvin D. Stevens ; Ron Williams
• 关键词：Organic source markers ; Source apportionment ; Exposure ; Chemical Mass Balance (CMB)
• 刊名：Atmospheric Environment
• 出版年：2008
• 出版时间：March 2008
• 年：2008
• 卷：42
• 期：8
• 页码：1742-1751
• 全文大小：210 K

文摘

Concentrations of PM_2.5, elemental carbon (EC), organic carbon (OC), 30 organic source markers (13 alkanes, 14 polycyclic aromatic hydrocarbons and ketones, and 3 hopanes) and 19 inorganic source markers are reported from residential indoor, residential outdoor, and ambient microenvironments from a nine home pilot study conducted in Tampa, Florida. Mean daily PM_2.5 concentrations were 9.3 μg m⁻³ for residential indoor, 11.3 μg m⁻³ for residential outdoor, and 12.7 μg m⁻³ for ambient microenvironments. The EPA Chemical Mass Balance Model (CMB8.2) was used for source apportionment of PM_2.5 residential outdoor samples. Four main sources of PM_2.5 were identified: sulfate (55±6 % ) (average outdoor PM_2.5±S.D.), gasoline-powered motor vehicles (32±4 % ), diesel-powered vehicles (8±2 % ), and road dust (5±1 % ).