Study on Removal of NDMA from Municipal Wastewater by UV/H2O2 Method
The UV/H2O2 method is an effective approach for removing N-nitrosodimethylamine (NDMA) in municipal wastewater. Based on a response surface model, the effects of H2O2 concentration, pH and light strength on the removal efficiency of NDMA were studied. Through ANOVA analysis, it was found that light strength was the most significant factor affecting the removal efficiency of NDMA. A functional relationship between the above three factors and NDMA removal efficiency was obtained. When the concentration of H2O2 was 10 mg·L-1, the pH was 12, and the light strength was 8×10-11 E·s-1, the predicted NDMA removal efficiency was 97.36％, which was very consistent with the experimental results of 96.97％.
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