甲基橙溶液的超声波降解研究

Study on ultrasonic degradation of methyl orange solution

研究了甲基橙溶液的超声波降解动力学,并考察了温度、介质酸度、催化剂、空气的通入对降解速率的影响。结果表明,甲基橙的降解反应为一级反应,反应速率常数为2.13×10-3min-1。。在25-45℃范围内,温度对甲基橙降解影响不明显。当温度大于80℃时,降解率明显下降。介质的酸度对甲基橙的降解影响较大,酸性条件下,随着酸度的增加,降解速率加快,中性条件下降解速率最低,当pH值大于8时.降解速率又有所提高。

The ultrasonic degradation of methyl orange solution is discussed. The effects of reaction temperature, acidity of solution, catalyst and airing on degradation rate are studied. This degradation reaction is first-order reaction and the reaction rate constant is 2.13 × 10-3min-1. There is no obvious change on the degradation rate under 25-45℃. When the temperature is over 80℃ , the degradation rate would drop suddenly. The acidity of solution has bigger effects on the degradation of methyl orange. In acidity condition, as the acidity is increased, so the degradation rate is accelerated; in neutro-condition, degradation rate is lowest; degradation rate is again increased slowly when pH is bigger than 8.