关键词: 微波, 亚甲基蓝 , 过氧化氢 , 降解 ,  , 反应动力学

Abstract: The synergy effect of microwave/peroxide degradation of the methyleneblue in water is investigated in this study. The initial concentration of substrate, pH, and amount of hydrogen peroxide are examined to see their effect on the degradation performance, respectively. The results show that microwave and hydrogen peroxide have obvious synergy on degradation of methylene blue. In this experiment, the more concentrated of hydrogen peroxide, the more degradation to the methyleneblue. The degradation is enhanced noticeably under appropriate pH, the lowest degradation is noticed at the pH of 6～7. With higher initial concentration of methylene blue, the degradation rate is reduced. The degradation of methyleneblue is a first order reaction, of which the reaction rate constant is 0.189 8 min-1 and the activation energy is 2.76 kJ/mol. The degradation rate can be as high as 95.0%～96.0% in the following conditions: initial concentration 50～70 mg/L, the mass fraction of hydrogen peroxide 1.0wt%, 473 K for 7 min, pH=3 or 12.

Key words: Microwave, Methyleneblue, Peroxide, Degradation, Reaction kinetics