Degradation of Organics from Laboratory Wastewater by Ultrasonic/Fenton Process

摘要

Organics in laboratory wastewater were treated by ultrasonic/Fenton method. COD degradation of laboratory wastewater was studied, which was affected by some factors such as ultrasonic frequency, ultrasonic power, the dosage of H_2O_2 and Fe~(2+), and the initial pH. Orthogonal experiment was carried out. The results of degradation by ultrasonic/Fenton method were compared with those results when ultrasonic or Fenton was used to degrade organics respectively. The results show that ultrasonic/Fenton can effectively degrade the organic pollutants in laboratory wastewater, and the degradation efficiency is higher than that of each process alone. The optimal conditions are as follows: frequency is 45 kHz, power is 120 W, the concentration of H_2O_2 is 0.71 mmol/L, the concentration of Fe~(2+) is 0.03 mmol/L and pH is 3 in the experiment when COD of 50 mL laboratory wastewater is 21972 mg/L.