Degradation of 2,4-Dichlorophenol Catalyzed by Ultrasound-Assisted Laccase

Laccase possesses a good degradation effect on organic pollutants,but it is too long to achieve the desired effect. In order to improve the treatment effect of laccase on degradation of organic pollutants,2,4-dichlorophenol( 2, 4-DCP) was selected as a treatment target in the study. This study investigated a newtechnique for catalyzing the degradation of 2,4-DCP, that is,ultrasound-assisted laccase catalysis. The optimal experimental parameters such as p H,ultrasonic power,duty cycle and laccase concentration were determined under optimized experimental conditions. The results showed that the optimum conditions for degradation of 2,4-DCP were that pH = 5. 5,the input power was 105 W,the duty cycle was 50% and the laccase concentration was0. 4 U/m L. The degradation rate of 2,4-DCP reached 77. 5% under the optimum conditions at 4 h. When in ultrasonic environment,the enzymatic activity of laccase could be stimulated and improved.Compared with conventional methods,this technique significantly promoted the degradation rate of 2,4-DCP while reduced action time. Furthermore, no newpollutant was introduced into the degradation process. Therefore,ultrasound-assisted laccase catalysis is an environmentally friendly technique to degrade pollutants.