Treatment of acrylonitrile polymeric wastewater by ultrasonic/Fenton method
Ultrasonic/Fenton method was used to treat acrylonitrile polymeric wastewater,the effect of it on COD removal and the influencing factors were studied.The results showed that,the combined process of ultra-sonic and Fenton had a better COD removal effect compared to single ultrasonic or Fenton method.Using ultra-sonic/Fenton method to treat polymeric wastewater,factors such as initial pH value of the wastewater,H2O2 dosage,H2O2 dosing mode,n(Fe2+)∶n(H2O2),ultrasonic power and ultrasonic time,had certain influence on COD removal,the optimal treatment condition was:the ultrasonic power was 200 W,the initial pH value of the wastewater was 3.5,dosing 15 mL/L H2O2 drop by drop,n(Fe2+)∶n(H2O2)=1∶2,the ultrasonic time was 30 min.Under the above condition,the removal rate of COD could reach 83%.