The heterogeneous oxidation of SO2 on aerosol surface |
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| Authors: | Huiwang Gao Meiyuan Huang Huaying Xu |
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| Institution: | (1) Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029 Beijing, China |
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| Abstract: | 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 SO
4
2-
- concentrations by 8%–50% in the surface layer.
Project supported by the National “85-912” Key Science and Technology Project. |
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| Keywords: | gas-phase chemistry liquid-phase chemistry aerosol heterogeneous chemical model sulfur deposition |
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