Electrochemical degradation of tetracycline by γ-Al₂O₃ –Bi–(Sn/Sb) three-dimensional particle electrode

In this work, the degradation of tetracycline (TC) in wastewater was investigated using the γ-Al₂O₃ – Bi–(Sn/Sb) particle electrodes. Parameters affecting the degradation efficiency and energy consumption of the γ-Al₂O₃ –Bi–(Sn/Sb) particle electrodes, such as electrical conductivity, initial pH, air flow, current intensity, plate distance, filling ratio, and initial wastewater concentration, were systematically investigated. Results showed that the optimal conditions were 4000 mS·cm⁻¹ conductivity, pH 6, 15 mL·min⁻¹ air flow, 0.1 A current intensity, 4 cm plate distance, 0.05 g·mL⁻¹ filling ratio, and 100 mg·L⁻¹wastewater concentration. More than 90% and 70% of TC and total organic carbon were degraded, respectively, under the optimal conditions. In addition, the γ-Al₂O₃ –Bi–(Sn/Sb) particle electrodes had good stability and reproducibility.