Abstract：The electrode performances of a packed-bed electrode reactor (PBER) were evaluated through electrochemical measurements containing cyclic voltammetry (CV) and electrochemical impendence spectra (EIS) and methylene Blue (MB) wastewater treatment. The CV and EIS results implied that the electrode area of the PBER was 1.54 times than that of the PbO2/Ti anode, indicating the bed expansion coefficient λ was 0.54. Furthermore, the effective current ratio of PbO2/Ti anode (γ) and activated carbon particle electrode (β) during the MB oxidation were 0.63 and 0.34, respectively. As a comparison, the values of parameters λ and the sum of γ and β obtained from MB oxidation experiments were 0.54 and 0.99, which were in accordance with those of the CV and EIS tests. The accuracy of the proposed methods was further validated by using the energy consumption and current efficiency in MB oxidation via the regressive analysis and F test. This work provided a theoretical and feasible tool for evaluating particle electrode performance of a packed-bed electrode system.
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