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1709509 
Journal Article 
The heterogeneous oxidation of SO2 on aerosol surface 
Gao, HW; Huang, MY; Xu, XY 
1997 
1 
Science in China Series D: Earth Sciences
ISSN: 1006-9313
EISSN: 1862-2801 
40 
5 
518-523 
WOS:A1997XU77300011 
A heterogeneous chemical model is developed by coupling aerosol, gas-phase and liquid-phase chemical model. SO2 oxidation rates on the aerosol surface are calculated and the influence of some factors is discussed. Model simulations indicate that SO2 heterogeneous oxidation rates are sensitive to the mass concentration and chemical composition of aerosols, relative humidity, initial values of SO2 and H2O2. The heterogeneous chemical model is coupled with a Eulerian deposition model. Model results show that oxidation of SO2 on the aerosol surface is found to reduce SO2 levels by 5%-33%, to increase SO42- concentrations by 8%-50% in the surface layer. 
gas-phase chemistry; liquid-phase chemistry; aerosol; heterogenous chemical model; sulfur deposition