Chemical composition and toxicity of Siberian biomass burning in the Large Aerosol Chamber
A.V. Semenova1, Yu.A. Zavgorodnyaya1, M.A. Chichaeva1, V.S. Kozlov2, O.B. Popovicheva3
1Lomonosov Moscow State University, Moscow, Russia
2V.E. Zuev Institute of Atmospheric Optics of Siberian Branch of the Russian Academy of Science, Tomsk, Russia
3Skobeltsyn institute of Nuclear Physics Lomonosov Moscow State University, Moscow, Russia
Keywords: biomass burning aerosols, Siberian wildfires, Large Aerosol chamber, flaming, smoldering, organic compound, functional group, polycyclic aromatic hydrocarbon
Abstract
Physicochemical and toxicological properties of biomass burning are of a big importance for assessment of wildfire impact on environment. However, the data on Siberian wildfires are much limited. The composition of Siberian biomass burning is studied in the Large Aerosol Chamber (LAC) of Institute Atmospheric Optics, Siberian Branch, Russian Academy of Sciences (Tomsk). Here, we present FTIR spectroscopy, gas chromatography-mass spectrometry, and liquid chromatography experimental data on composition of organic compounds in Siberian pine and forest debris smoke produced at smoldering and flaming phases and due to aging. Markers which allow identifying the combustion conditions and biomass type are established, namely, characteristic absorption bands, ratios of carboxyl and aliphatic functionalities, diagnostic ratios of polycyclic aromatic hydrocarbons (PAHs). Emission factors and carcinogenic risk for smoke PAH are assessed.
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