Department of Environmental Science and Engineering, Huaqiao University, Fujian Province Engineering Research Center of Industrial Wastewater Biochemical Treatment, Xiamen 361021, China
Abstract：This study innovatively employed the extracellular reduction activity of S.oneidensis MR-1 (MR-1) bacteria to prepare a Cu/graphene oxide composite material (MR1-Cu-GO) as an electrocatalyst (EC) and persulfate (PMS) synergistic catalyst. Characterization results indicated that the obtained MR1-Cu-GO exhibited a well-defined distribution of small-sized Cu species (with a diameter of approximately 5~10nm), with the predominant forms of Cu species being a mixture of CuCl2, CuO, and Cu2(OH)2CO3. Efficiency tests for RBK5 degradation reveal that the MR1-Cu-GO/PMS, MR1-Cu-GO/EC, and MR1-Cu-GO/EC/PMS systems all exhibit excellent degradation efficiency towards RBK5. Among them, the MR1-Cu-GO/EC/PMS system shows the highest degradation efficiency. Under optimal conditions with an applied current of 50A/m2 and an initial PMS concentration of 3mmol/L, utilizing the generation of active substances such as HO· and SO4·-, the system achieves a 100% RBK5 degradation rate within 30 minutes.
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