Electrocatalytic oxidation of low concentration cefotaxime sodium wastewater using Ti/SnO2-RuO2 electrode: Feasibility analysis and degradation mechanism

In this research, Ti/SnO2-RuO2 stable anode was successfully prepared by thermal decomposition method, and low concentration cefotaxime sodium (CFX) was degraded by green and sustainable electrocatalytic oxidation technology. The electrocatalytic activity and stability of the Ti/SnO2-RuO2 coating electrode were studied ac-cording to the polarization curve of oxygen and chlorine evolution. The effects of current density, initial con-centration, pH, electrolyte concentration, and other technological parameters on the degradation efficiency were discussed. Orthogonal experiment results indicated that when the current density was 25 mA cm(-2) , concentration of electrolyte was 5 mM and the pH value was 7, the best CFX removal rate of 86.33% could be obtained. The degradation efficiency of electrocatalytic oxidation was discussed through electrochemical analysis. Fourier transform infrared spectroscopy was used to analyze the different inlet and outlet stages before and after the degradation of CFX, and the possible degradation process was discussed. Therefore, the electrocatalytic oxidation of Ti/SnO2-RuO2 electrode was a clean and efficient technology, which could be widely used in the treatment of CFX wastewater.

Automated summary

In this study, a stable Ti/SnO2-RuO2 anode was prepared successfully and used for the degradation of low concentration CFX using green and sustainable electrocatalytic oxidation technology. The effects of various parameters on the degradation efficiency were discussed, and the optimal conditions for CFX removal were identified. The electrochemical analysis and Fourier transform infrared spectroscopy provided insights into the degradation efficiency and process.