Atmospheric
aerosols have important impacts on climate, air quality and human health. Air
quality and climate models often cannot capture the chemical complexity of
aerosols, which contain inorganic ions and thousands of different organic compounds.
Our group focuses on elucidating the chemical interactions among these
different components, and identifying the important mechanisms for atmospheric
modeling. In this talk, I will discuss mixing of different organic components
and new methods to parameterize these interactions using Hansen Solubility
Parameter. These mixing interactions can result in differences of up to 30% in
predictions of mass concentrations. We also investigated the reactions between
sulfur dioxide and secondary organic aerosol, which are rapid and may be an
important sink for SO2 in the atmosphere. Our work highlights the importance of
understanding these interactions, and identifying the most important mechanisms
in order to accurately and efficiently model atmospheric aerosol formation.
https://mediaspace.gatech.edu/media/chan.mpg/1_6ojhe7hm
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