甲基紫溶液超声波降解的实验研究

研究了甲基紫溶液的超声波降解动力学，并考察了温度、介质酸度、催化剂对降解速率的影响。结果表明，甲基紫的降解反应为一级反应，反应速率常数为1．35×10^-2min^-1。在20～45℃范围内，温度对甲基紫降解不明显；当温度大于80℃时，降解率明显下降。介质的酸度对甲基紫的降解影响较大．酸性、中性条件下，甲基紫的降解效果好；当pH值大于10时，降解速率明显下降。在反应液中加入碘离子，能抑制甲基紫的降解。

Experimental study on the ultrasonic degradation of methyl violet solution

The ultrasonic degradation of methyl violet solution is discussed.The effects of reaction temperature,acidity of solution,and catalyst on degradation rate are studied.The degradation reaction is first-order reaction and the kinetic parameter is 1.35×10~(-2)min~(-1).There is no obvious change on the degradation rate under 20-45℃.When the temperature is higher than 80℃,the degradation rate drops obviously.The acidity of solution has great effects on the degradation of methyl violet. Acidity and neutro-condition are favorable to the degradation efficiency.The degradation rate reduces obviously when pH value is higher than 10.Degradation of methyl violet is restrained after adding I~-.