Abstract：The catalytic wet co-oxidation (CWCO) of bisphenol A (BPA) was conducted with NaNO2 as catalyst and 2,4,6-trichlorophenol (TCP) as co-oxidizing substance, and the results showed that the addition of TCP could significantly promote the degradation of BPA in the presence of NaNO2: when the mixture of BPA and TCP reacted at 170℃ and 0.5MPa oxygen pressure for 6h, the COD removal reached to 71.2%, while the COD removal was only 24.7% after single BPA reacted at the same experimental conditions. On this basis, the effects of reaction temperature, oxygen pressure, reaction time, TCP concentration and NaNO2 concentration on the CWCO of BPA were investigated, and the optimum experimental conditions were selected (170℃ of reaction temperature, 0.5 MPa of oxygen pressure, 6h of reaction time, 0.5mmol/L BPA, 0.5mmol/L TCP and 0.1mmol/L NaNO2). Under the optimized conditions, BPA and TCP removal reached 100% and 96.4%, respectively, meanwhile the biodegradability index of the mixture after the CWCO process was significantly improved with the ratio of BOD5/COD increasing from 0.08 of the raw mixture to 0.95. In addition, the main degradation products determined by GC-MS were some small organic acids, including acetic acid, 2-methylglutaric acid, succinic acid, 3-methyladipic acid, propanetricarboxylic acid and 1-propenyl-1, 2, 3-tricarboxylic acid. The co-oxidation technology for BPA and TCP provides a potential application in treatment of polluted waters.
