Electrolyte effects on aqueous atmospheric oxidation of sulphur dioxide by hydrogen peroxide |
| |
| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, School of Environmental Studies, China University of Geosciences, 430074 Wuhan, China;2. University of Texas at Austin, Austin, TX 78705, USA;3. University of Houston, Department of Civil and Environmental Engineering, Houston, TX 77204-4003, USA |
| |
| Abstract: | The rate of oxidation of sulphur dioxide by hydrogen peroxide in the presence of various supporting electrolytes has been determined by the stopped flow method. In a sodium perchlorate medium (chosen as reference electrolyte) first-order kinetics were observed with respect to HSO3?, H2O2 and H+. The influence of the ionic strength was investigated and the third-order rate constant was calculated at infinite dilution. The rate constants of the reaction are shown to be far higher when chloride or ammonium ions are added to the solution.The effect of temperature and traces of metals ions (Mn2+, Fe2+, Fe3, Cu2+, Cr3+) was studied. The oxidation reaction is virtually insensitive to the effects of Mn2+, Fe3+, Cu2+ and Cr3+. Catalytic activity is observed with Fe2+. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
