Electrochemical advanced oxidation process based on boron-doped diamond(BDD)electrode is one of the most promising technologies for the treatment of industrial organic wastewater.The physical and electrochemical properties of Nb-based BDD electrode(Nb/BDD)were studied,and the degradation effect of phenol with different current densities and the treatment of coking wastewater in a petrochemical plant were investigated with Nb/BDD as anode.The results indicated that Nb/BDD had a high oxygen evolution potential of 1.78 V,a wide electrochemical potential window of 3.34 V,a low background current of 0.21 mA and a high electrochemical active area of 3.25 cm2.The phenol removal rate and apparent reaction rate constant increased with the increase of current density.The highest phenol removal rate was 93.52%and the apparent reaction rate constant was 0.437 45 h-1 at 100 mA·cm-2.After electrolysis at the optimal current density of 80 mA·cm-2 for 10 h,the COD removal rate of coking wastewater was 69.78%,and the energy consumption was only 0.038 kW·h·g-1.
维普
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