Abstract：In order to overcome the defects for the conventional electrochemical oxidation process, the pulsed power supply was introduced into electrochemical oxidation process with MB aqueous solution as simulated dye wastewater using the Ti/PbO2-PVDF electrode. The effects of five factors were analyzed, including initial concentration, pulse voltage, pulse frequency, duty ratio and NaCl concentration, on the degradation efficiency. The optimized parameters obtained were listed as, initial concentration of MB 100mg/L, the pulse voltage 5.5V, the pulse frequency 1500Hz, the duty cycle 50% and the NaCl concentration 0.01mol/L. Under this condition, the effect of electrochemical oxidation in the pulse and DC power supply mode were compared. The results showed that for the pulse mode, the MB decolorization rate, COD removal rate and current efficiency in 90min were 100%, 94.5% and 60.1%, respectively, which were higher than that in the DC mode. The energy consumption for the pulse mode was 0.013kWh/gCOD, which was far less than 0.107kWh/gCOD for the DC mode. The results showed that compared to the DC power supply mode, the pulse mode had obvious advantages.
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