Heterogeneous interactions of calcite aerosol with sulfur dioxide and sulfur dioxide–nitric acid mixtures
| Autor: | Vicki H. Grassian, Paul D. Kleiber, A. Preszler Prince, Mark A. Young |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Aerosols
Calcite Infrared Rays Surface Properties Chemistry Spectrum Analysis Inorganic chemistry General Physics and Astronomy chemistry.chemical_element Humidity Nitric Acid complex mixtures Sulfur Calcium Carbonate Aerosol chemistry.chemical_compound Calcium carbonate Sulfur Dioxide Carbonate Nitrogen dioxide Relative humidity Physical and Theoretical Chemistry Sulfur dioxide |
| Zdroj: | Physical Chemistry Chemical Physics. 9:3432 |
| ISSN: | 1463-9084 1463-9076 |
| DOI: | 10.1039/b703296j |
| Popis: | The heterogeneous chemistry of sulfur dioxide with CaCO(3) (calcite) aerosol as a function of relative humidity (RH) has been studied under isolated particle conditions in an atmospheric reaction chamber using infrared absorption spectroscopy. The reaction of SO(2) with calcite produced gas phase CO(2) as a product in addition to the conversion of the particulate carbonate to sulfite. The reaction extent was found to increase with elevated RH, as has been observed for the similar reaction with HNO(3), but much higher relative humidities were needed to significantly enhance the reaction. Mixed experiments in which calcite aerosol was exposed to both HNO(3) and SO(2) were also performed. The overall reaction extent at a given relative humidity did not appear to be increased by having both reactant gases present. The role of carbonate aerosol as an atmospheric sink for sulfur dioxide and particulate nitrogen and sulfur correlations are discussed. |
| Databáze: | OpenAIRE |
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