Oxidative degradation of Bisphenol A (BPA) by UV/H_2O_2 process

摘要

The photochemical degradation of Bisphenol A(BPA) in UV/H_2O_2 advanced oxidation process was studied in this paper. The combined UV/H_2O_2 process could effectively degraded BPA. Results show that BPA degradation rate was affected by H_2O_2 concentration, intensity of UV radiation, initial BPA concentration, and solution pH. The first order rate constant (k) increased with H_2O_2 concentration from 5 to 20mg/L and decreased when H_2O_2 concentration exceeded 50mg/L. Increasing UV radiation intensity signicantly increased the degradation rate of BPA. The degradation rate of BPA decreased with increasing BPA concentration. The value of k increased with increasing pH in the range of pH 2.1-4.5, but decreased at higher solution pH. NO_3~-, Cl~-, HCO_3~- have inhibitory action on BPA photodegradation; their inhibitory action order is HCO_3~->NO_3>CL~-when anions concentrations were 5mmol/L.