An Application of a Pseudo-Second Order S02Reaction Algorithm to Urban Air Pollution Modeling
| Autor: | A.R. Laird, R.W. Miksad |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Pollution
Environmental Engineering Mathematical model Point source media_common.quotation_subject Air pollution chemistry.chemical_element Particulates medicine.disease_cause Sulfur chemistry.chemical_compound chemistry medicine General Earth and Planetary Sciences Environmental science Algorithm Air quality index Sulfur dioxide General Environmental Science media_common |
| Zdroj: | Journal of the Air Pollution Control Association. 29:147-152 |
| ISSN: | 0002-2470 |
| DOI: | 10.1080/00022470.1979.10470771 |
| Popis: | Observed particulate sulfur distributions in Houston, Texas, indicate that local point sources of SO/sub 2/ may contribute significantly to local particulate sulfur concentrations. This paper investigates the influence of the chemical reaction scheme (first or second order) used to describe the oxidation of SO/sub 2/ to sulfate in a short term air quality model for an area like Houston. The air quality model used was the Texas Episodic Model (TEM) developed by the Texas Air Control Board. Predicted spatial distributions of sulfur concentrations were computed for Houston by using both the existing first order oxidation scheme of the TEM, and by using a pseudo-second order algorithm for catalytic oxidation of point source SO/sub 2/ emissions. Comparison of model predictions to measured distributions show that for half-lives ranging from 0.5 to 6 hours the sulfur levels and distributions predicted by the first order oxidation scheme did not agree with observation. Sulfur levels predicted by the pseudo-second order scheme agreed much better with observed spatial distributions and individual monitoring site values. Sulfur distributions and site values predicted by the pseudo-second order scheme were not found to be sensitive to reasonable variations in SO/sub 2/ oxidation rates. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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