Influence of Fe and mn ions on the incorporation of radioactive 35SO2 by sulfate aerosols |
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| Institution: | 1. Laboratory of Environment-Enhancing Energy (E2E), Key Laboratory of Agricultural Engineering in Structure and Environment, Ministry of Agriculture, College of Water Resources and Civil Engineering China Agricultural University, Beijing 100083, China;2. State Key Laboratory of Catalytic Materials and Reaction Engineering, Research Institute of Petroleum Processing, SINOPEC, Beijing 10083, China;3. State Key Laboratory of Coal-based Low Carbon Energy, ENN Sci & Tech Co., Ltd., Langfang 065001, China;4. Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA |
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| Abstract: | The rate of incorporation of radiolabeled sulfur dioxide has been determined in submicron sized ammonium sulfate droplet aerosols with and without catalytic metal ions (Fe3+, Mn2+). The sulfate droplets were generated by nebulizing solutions with a multiple jet Collison nebulizer and aged up to 30 min in a 10 m3 plug-flow reaction duct. Radiolabeled 35SO2 was metered into purified air to provide a concentration of 5 ppm.Three different atmospheres were studied: SO2 in purified air, SO2 in the presence of ammonium sulfate aerosol (1 mg m−3, 1 μm MMAD), and SO2 in the presence of ammonium sulfate aerosol containing Fe3+ and Mn2+ ions. No measurable SO2 conversion was detected in samples from atmospheres without the catalytic metal ions. A net SO2 conversion rate equivalent to 0.02 % h−1 was observed in the presence of Fe3+ and Mn2+ ions. |
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