AVS 49th International Symposium
    Surface Science Tuesday Sessions
       Session SS2-TuA

Paper SS2-TuA7
Surface Chemistry of Oxide and Carbonate Particles in the Atmosphere

Tuesday, November 5, 2002, 4:00 pm, Room C-110

Session: Atmospheric Surface Chemistry
Presenter: V.H. Grassian, University of Iowa
Authors: V.H. Grassian, University of Iowa
B.J. Krueger, University of Iowa
S. Carlos-Cuellar, University of Iowa
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While there is a growing body of evidence which suggests that reactions on mineral aerosol may play an important role in the troposphere, there is very little understanding of what chemistry occurs on the surface of these particles. The focus of this talk is on recent laboratory studies of surface reactions of inorganic and organic acids found in the atmosphere on oxide and carbonate particles. These particles are used as laboratory surrogates for mineral aerosol. Kinetic measurements are made of these potentially important atmospheric reactions so as to quantify the rates of these reactions. Spectroscopic measurements along with atomic force and scanning electron microscopy provide additional information about surface reaction mechanisms. The laboratory data are then used as input into atmospheric chemistry models in order to assess the importance of these surface reactions in the troposphere.