Treatment of nitrile rubber wastewater by Fe/C microelectrolysis-Fenton combined process

The nitrile rubber wastewater from some petrochemical enterprise was treated by microelectrolysis-Fenton combined process.The main influencing factors of microelectrolysis and Fenton processes were investigated respectively,and on this basis,the processing conditions were optimized and treatment effect was verified for the combined process.The results showed that when the combined process was used to treat the wastewater,the total removal rates of chemical oxygen demand and acrylonitrile were more than 50.00% and 95% respectively under the condition of Fe/C(mass ratio) 3/1,initial pH value 2.00-10.00,reaction time 1 h for microelectrolysis;the concentrations in NBR wastewater of oxidant H2O2 and catalyst Fe2+ 2.0 mL/L,0.2 g/L respectively,reaction temperature 40 ℃ and reaction time 45 min for Fenton process.Compared to single Fenton process with same treatment results,the combined process could decrease H2O2 from 3.0 mL/L to 2.0 mL/L,and Fe2+ from 0.6 g/L to 0.2 g/L.