Polycyclic aromatic hydrocarbons and their molecular diagnostic ratios in urban atmospheric respirable particulate matter |
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| Authors: | Marí a del Rosario Sienra, Nelson G. Rosazza,Margarita Pr ndez |
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| Affiliation: | aDepartamento de Ciencias Químicas, Facultad de Ecología y Recursos Naturales, Universidad Andrés Bello, Av. República 217, Santiago 1, Santiago, Chile;bEscuela de Química y Farmacia, Facultad de Ciencias de la Salud, Universidad Andrés Bello, Chile;cUniversidad de Chile, Facultad de Ciencias Químicas y Farmacéuticas, Laboratorio de Química de la Atmósfera, Olivos 1007, Independencia. Santiago, Chile |
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| Abstract: | Atmospheric concentrations of polycyclic aromatic hydrocarbons (PAHs) in Santiago de Chile city were evaluated to study particulate PAHs profiles during cold and spring weather periods. Urban atmospheric particulate matter PM10 was collected using High Volume PM10 samplers. Fifteen samples of 24 h during austral winter and 20 samples of 24 h during spring, 2000 were collected at two sampling sites (North–East and Central areas of the city) whose characteristics were representative of the prevailing conditions. Seventeen PAHs were quantified and total PAHs concentration ranged from 1.39 to 59.98 ng m−3, with a seasonal variation (winter vs. spring ratio) from 0.5 to 12.6 ng m−3. Molecular diagnostic ratios were used to characterize and identify PAHs emission sources such as combustion and biogenic emissions. Results showed that the major sources of respirable organic aerosol PM10 in Santiago are mobile and stationary ones. |
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| Keywords: | Polycyclic aromatic hydrocarbons PM10 Molecular diagnostic ratios Santiago de Chile |
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