Electro-Fenton Degradation of High Concentration Rhodamine B on Nickel Foam Cathode Catalyzed by Cucumber Bio-Templated Fe3O4@PTFE

Electro-Fenton technology has a great advantage in the treatment of high concentration refractory organic wastewater. In this paper, nickel foam was used as the cathode and cucumber bio-templated Fe3O4 was used as the catalyst to degrade rhodamine B by the electro-Fenton method. The active species in the degradation process were studied, and the degradation conditions were optimized. The results showed, compared with analytical reagent Fe3O4, the as-prepared cucumber bio-templated Fe3O4 has a larger specific surface area, a greater degradation efficiency, a higher concentration of generated center dot OH, and a lower concentration of generated H2O2. Hydroxyl radical is the active species during the electroFenton degradation. The degradation efficiency of 100 mg/L rhodamine B catalyzed by cucumber biotemplated Fe3O4 can reach 81.8% under the conditions of pH 3 and a current of 10 mA.

Automated summary

Electro-Fenton technology was used to treat high concentration refractory organic wastewater, with cucumber bio-templated Fe3O4 as the catalyst for degrading rhodamine B. The results showed that the cucumber bio-templated Fe3O4 had a larger specific surface area, higher degradation efficiency, and lower concentrations of generated OH and H2O2 compared to analytical reagent Fe3O4. The active species in the degradation process were identified as hydroxyl radicals.