Jun Hu,Xinze Bian,Yi Xia,Mili Weng,Wan Zhou,Qizhou Dai
In this study, Cu doped PbO 2 electrode was prepared by electrodeposition and used for electrochemical oxidation degradation of amoxicillin (AMX), which showed that the effect of Cu doped PbO 2 electrode was better than that of undoped PbO 2 electrode in degrading amoxicillin. An optimized model was setup with the help of response surface method (RSM). The optimal values of experimental parameters and the interactions between the parameters were explored, including current density, pH and initial AMX concentration. The combustion efficiency was calculated in the electrochemical oxidation of amoxicillin in aqueous solution and the enhancement was found with Cu doped PbO 2 electrode. The enhanced mechanism with Cu doped PbO 2 electrode was discussed based on the analysis of hydroxyl radicals and the combustion efficiency. The mechanism of amoxicillin degradation was discussed. This paper can provide basic data and technique reference for amoxicillin pollution control.
This work investigated the electrochemical degradation of amoxicillin (AMX) in aqueous solution with Cu-PbO 2 electrode. The main influence factors on the degradation of AMX, such as Na 2 SO 4 concentration, initial AMX concentration, current density and initial pH value, were analyzed in detail. Under the optimal conditions, the removal rates of AMX and chemical oxygen demand (COD) reached 99.4% and 46.3% after 150 min treatment. The results indicated that the electrochemical degradation of AMX fitted pseudo-first-order reaction kinetics. Compared with undoped PbO 2 electrode, Cu-PbO 2 electrode had a smaller crystal size, more proportion of hydroxyl oxygen species, greater AMX and chemical oxygen demand (COD) removal efficiency, higher average current efficiency (ACE) and lower electrical efficiency per log order (EE/O). Electrochemical oxidation using Cu-PbO 2 electrodes was an effective way to eliminate amoxicillin in aqueous solution. Moreover, a possible degradation pathway including ring open and mineralization was proposed by intermediate products determined by GC-MS method. This paper could provide basic data and technique reference for the amoxicillin wastewater pollution control .
危险品化学品经营许可证（带存储）