Abstract
We report here results of an experimental study of the OH-initiated oxidation of solid organics in the presence of O2, NOx and H2O, using two kinds of self-assembled organic monolayers (alkane and aromatic), paraffin and pyrene films as proxies for organic aerosol. We show that the OH-initiated oxidation of the alkane surfaces leads to rapid volatilization. The gas-phase products detected include HO2, H2O2, CO, CO2, HCO, CH2O, CH3CHO, CH3OH, and HCOOH. We conclude that volatilization is at least as efficient as wet deposition as a removal process for aliphatic particulates, whereas aromatic particulates show higher stability towards volatilization. Copyright 2004 by the American Geophysical Union.
Author supplied keywords
- 0305 Atmospheric Composition and Structure: Aerosols and particles (0345, 4801)
- 0317 Atmospheric Composition and Structure: Chemical kinetic and photochemical properties
- 0322 Atmospheric Composition and Structure: Constituent sources and sinks
- 0345 Atmospheric Composition and Structure: Pollution-urban and regional (0305)
- 0365 Atmospheric Composition and Structure: Troposphere-composition and chemistry
Cite
CITATION STYLE
Molina, M. J., Ivanov, A. V., Trakhtenberg, S., & Molina, L. T. (2004). Atmospheric evolution of organic aerosol. Geophysical Research Letters, 31(22), 1–5. https://doi.org/10.1029/2004GL020910
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