Abstract:The efficiency of the degradation of prometryn residue in aquaculture water after oxidizing by potassium permanganate, hydrogen peroxide and sodium hypochlorite were examined under various conditions, including normal conditions, ultraviolet irradiation, ultrasonic treatment and pH, thus providing a feasible approach for degradation and removal of prometryn residue in aquaculture water. The results showed that sodium hypochlorite had the highest oxidation degradation rate and its degradation effect was not affected by ultraviolet irradiation, ultrasonic and pH. Potassium permanganate and hydrogen peroxide had no obvious effect on the degradation of prometryn. Ultrasonic and ultraviolet had no effect on the degradation rate of these two oxidants. However, when the pH value was 10, the removal effect of potassium permanganate and hydrogen peroxide on prometryn was significantly improved. The oxidation of prometryn by sodium hypochlorite was found to obey a second-order reaction kinetics model.