Experimental study on degradation and oxidation of phenol by BDD electrode
Advanced electrochemical oxidation technology based on boron-doped diamond(BDD)electrode is an effective method to solve the problem of difficult degradation of organic pollutants.BDD films are success-fully synthesized by hot filament COD(HFCVD)combined with dynamic boron doped process on WC-Co sub-strate.On this basis,using the prepared WC-Wo/BDD electrode,and taking phenol as the target pollutant,the effects of current density,electrolyte concentration,pH value and initial concentration of phenol on degradation efficiency were investigated.The experimental results showed that,under the condition that the current density was 0.03 A/cm2,1.5 g/L Na2SO4 was used as electrolyte,the treatment of 1 000 mg/L phenol solution could achieve a COD removal rate of nearly 95%within 3 hours whether in acidic or alkaline environment.For phenol solution with concentration less than 500 mg/L,the COD removal rate can be close to 100%in the same time.The electrochemical advanced oxidation technology based on WC-Co/BDD electrode has a remarkable effect on mineralization of phenol.
WC-Co/BDD electrodehot wire chemical vapor depositionphenolcurrent densityelectrolyte concentrationpH value