Influence of NO2 and dissolved iron on the S(IV) oxidation in synthetic aqueous solution |
| |
| Institution: | 1. Institute of Geosciences, Shizuoka University, 836, Oya, Surugaku, Shizuoka 422-8529, Japan;2. Research Institute of Green Science and Technology, Shizuoka University, 836, Oya, Surugaku, Shizuoka 422-8529, Japan;3. Faculty of Fisheries Sciences, Graduate School of Fisheries Sciences, School of Fisheries Sciences, Hokkaido University, 3-1-1, Minato-cho, Hakodate, Hokkaido 041-8611, Japan;4. Atmosphere and Ocean Research Institute, The University of Tokyo, 5-1-5, Kashiwanoha, Kashiwa-shi, Chiba 277-8564, Japan;5. Faculty of Environmental Earth Science, Hokkaido University, Kita-10, Nishi-5, Kita-ku, Sapporo 060-0810, Hokkaido, Japan;6. Pan-Okhotsk Research Center, Institute of Low Temperature Science, Hokkaido University, Kita-19, Nishi-8, Kita-ku, Sapporo 060-0819, Hokkaido, Japan;1. Department of Environmental Engineering, Kun Shan University, Yung-Kang Dist., Tainan City 710, Taiwan;2. Department of Environmental Engineering, National Cheng Kung University, Tainan City 710, Taiwan;3. Emerging Compounds Research Center, Department of Environmental Science and Engineering, College of Engineering, National Pingtung University of Science and Technology, Pingtung County 912, Taiwan;4. National Institute of Environmental Health Science, National Health Research Institutes, Zhunan, Miaoli County 350, Taiwan;5. Department of Plant Medicine, College of Agriculture, National Pingtung University of Science and Technology, Pingtung County 912, Taiwan;6. MWH Americas Inc., Taiwan Branch, Taipei City 100, Taiwan;1. Key Laboratory for Photonic and Electronic Bandgap Materials, Ministry of Education, Harbin Normal University, Harbin 150025, China;2. College of Chemistry and Chemical Engineering, Hainan Normal University, Haikou 571158, China;3. College of Teacher Education, Harbin Normal University, Harbin 150025, China;1. Aristotle University of Thessaloniki, Department of Chemical Engineering, Analytical Chemistry Laboratory, Thessaloniki, 54124, Greece;2. Aristotle University of Thessaloniki, School of Physics, Department of Solid State Physics, 54124 Thessaloniki, Greece |
| |
| Abstract: | The influence of dissolved NO2 and iron on the oxidation rate of S(IV) species in the presence of dissolved oxygen is presented. To match the conditions in the real environment, the concentration of iron in the reaction solution and trace gases in the gas mixture was typical for a polluted atmosphere. The time dependence of HSO3−, SO42−, NO2− and NO3− and the concentration ratio between Fe(II) and total dissolved iron were monitored. Sulphate formation was the most intensive in the presence of an SO2/NO2/air gas mixture and Fe(III) in solution. The highest contribution to the overall oxidation was from Fe-catalysed S(IV) autoxidation. The reaction rate in the presence of both components was equal to the sum of the reaction rates when NO2 and Fe(III) were present separately, indicating that under selected experimental conditions there exist two systems: SO2/NO2/air and SO2/NO2/air/Fe(III), which are unlikely to interact with each other. The radical chain mechanism can be initiated via reactions Fe(III)–HSO3− and NO2–SO32−/HSO3−. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
