超声波/H2O2协同降解水中染料酸性嫩黄的研究

采用US／H2O2协同降解酸性嫩黄染料，考察了超声功率、H2O2用量、染料溶液的初始浓度及初始pH对降解效率的影响，并对降解动力学规律作了初步探讨，结果表明，酸性嫩黄的降解效率随超声波功率的增大而增大，随其初始浓度的增大而降低；当H2O2浓度介于一定范围内，增大H2O2用量可提高酸性嫩黄的降解效率，但H2O2用量过多时，会使降解效率下降；pH〈5时，降解效果较好，且pH越小，降解效率越高；pH≥5时，降解效率较低。在本实验条件下，超声波与双氧水对酸性嫩黄废水的降解存在协同作用，经US／H2O2协同降解120min后，酸性嫩黄的降解效率可迭84．0％。US／H2O2对酸性嫩黄的协同降解符合一级反应动力学规律。

Study on Synergistic Degradation of Acid Yellow in Water by Ultrasound/H2O2

Ultrasound(US)/H_2O_2 were used to degrade acid yellow in water.The effect of ultrasound power,H_2O_2 concentration,initial concentration and pH of acid yellow solution on degradation efficiency was investigated.The degradation kinetics was discussed.The results show that the degradation efficiency increases with power and decreases with increasing initial concentration of acid yellow. When the H_2O_2 concentration is less than a certain value,the degradation efficiency increases with it.Too much H_2O_2 employed will result in a decline of degradation efficiency.When pH is less than 5,the degradation efficiency is high,and the degradation efficiency decreases with increasing pH.When pH is greater than 5,the degradation efficiency is low.The synergistic effect to the degradation of acid yellow in water by US/H_2O_2 was observed.The degradation efficiency of 84.0% was reached in the presence of US/H_2O_2 within 120 min.The degradation kinetics by US/H_2O_2 conforms to first order reaction law.