The kinetics of oxidation of methylene blue with potassium bromate was investigated by observing decolorization of methylene blue in aqueous, aqueous methanol and aqueous isopropanol solvent system. The rate of reaction was studied as function of concentrations of methylene blue and potassium bromate in acidic medium at temperature 303 and 313 K. The increase in concentration of potassium bromate enhances the rate of decolorization of methylene blue in acidic medium; no significant change in rate was observed with variation of methylene blue. The rate of decolorization was found to be fastest in aqueous methanol compared to aqueous isopropanol and slow in aqueous medium. From the investigation, it was observed the reaction follows pseudo-first-order kinetics. The kinetic data were used to propose the mechanism of reaction. Thermodynamic parameters, enthalpy of activation (ΔH*), entropy of activation (ΔS*) and Gibbs free energy of activation (ΔG*), were also calculated to support kinetic results.

通过观察在水溶液，甲醇水溶液和异丙醇水溶液中亚甲基蓝的脱色，研究了用溴酸钾氧化亚甲基蓝的动力学。研究了在303和313 K温度下反应速率与酸性介质中亚甲基蓝和溴酸钾浓度的关系。溴酸钾浓度的增加提高了酸性介质中亚甲基蓝的脱色率；亚甲基蓝的变化没有观察到速率的显着变化。与异丙醇水溶液相比，发现在甲醇水溶液中脱色速率最快，而在水性介质中则较慢。通过研究，观察到反应遵循伪一级动力学。动力学数据用于提出反应机理。热力学参数H *），激活的熵（ΔS *）和吉布斯激活的自由能（ΔG *）也被计算来支持动力学结果。