Three-dimensionally (3D) electrochemical oxidation, as an advanced oxidation technology for wastewater treatment, has been widely used due to its many advantages. Granular material filled between two-dimensional electrodes as particle electrode is one of the key factors for high treatment efficiency. In order to improve the catalytic activity of granular activated carbon (GAC) as particle electrode for phenol degradation, the multi-component catalysts were supported on GAC by coprecipitation–calcination method. The effect of the supported component, working parameters (initial pH, electrolyte concentration and usage voltage) on the removal efficiency of chemical oxygen demand (COD) was investigated in detail. For the two-dimensional electrochemical oxidation, the COD removal efficiency is only 56.9% with only 32.0% of current efficiency. The COD removal rates for the 3D electrochemical oxidation with different particle electrodes are all greatly improved, especially for the Sn/Mn/Ce supported GAC. Its corresponding COD removal and current efficiency reach to about 75.6 and 72.6%, respectively.

作为一种先进的废水处理氧化技术，三维（3D）电化学氧化由于具有许多优势而被广泛使用。填充在二维电极之间的颗粒材料作为颗粒电极是提高处理效率的关键因素之一。为了提高颗粒状活性炭（GAC）作为颗粒电极降解苯酚的催化活性，通过共沉淀-煅烧法将多组分催化剂负载在GAC上。详细研究了负载组分，工作参数（初始pH，电解质浓度和使用电压）对化学需氧量（COD）去除效率的影响。对于二维电化学氧化，COD去除效率仅为56.9％，电流效率仅为32.0％。使用不同粒子电极进行3D电化学氧化的COD去除率都得到了极大的提高，尤其是对于Sn / Mn / Ce负载的GAC。其相应的COD去除率和电流效率分别达到约75.6和72.6％。