Cathodic microarc plasma electrolysis (CMPE) method was employed to degrade phenol in wastewater. The effects of electrode material, bath voltage, initial pH value and supporting electrolyte on phenol degradation were investigated. The plasma discharge was characterized by Optical emission spectroscopy (OES). The phenol concentration and its main intermediate products were determined by high performance liquid chromatography (HPLC). The chemical oxygen demand (COD) and its removal efficiency were also evaluated. The results illustrated that the Ti cathode degraded phenol more effectively than the Pt cathode due to the higher electron temperature in plasma discharge envelope and catalytic properties on Ti cathode. The electron temperature increased with increasing of bath voltage, which promoted the degradation of the phenol. Higher voltage enhanced the production and decomposition of intermediate products forward. For the pH value of electrolyte, alkaline condition was preferred to neutral and acidic conditions to improve degradation efficiency. Meanwhile, the chloride ion in the electrolyte promoted the ring-cleave reaction enormously.

采用阴极微弧等离子体电解（CMPE）法降解废水中的苯酚。研究了电极材料，浴电压，初始pH值和支持电解质对苯酚降解的影响。通过光发射光谱法（OES）表征等离子体放电。苯酚浓度及其主要中间产物通过高效液相色谱法（HPLC）测定。还评估了化学需氧量（COD）及其去除效率。结果表明，Ti阴极比Pt阴极更有效地降解了苯酚，这是由于等离子体放电外壳中较高的电子温度和在Ti阴极上的催化性能。电子温度随着浴电压的升高而升高，从而促进了苯酚的降解。更高的电压促进了中间产品的生产和分解。对于电解质的pH值，碱性条件优于中性和酸性条件以提高降解效率。同时，电解质中的氯离子极大地促进了开环反应。