The performance of an electrochemical process for the regeneration of granular activated carbon (GAC) was evaluated using boron-doped diamond (BDD) anodes. Three different configurations were tested in the reactor: fluidized bed, packed bed with a divided cell and packed bed with an undivided cell. The GAC used was previously saturated with a synthetic solution of methylene blue (MB). The effects of three operational parameters were evaluated: current density, initial pH and reaction time, and NaCl as the electrolyte. Regeneration efficiencies (REs) of up to 76 % ± 2 were achieved with a current density of 6 mA cm⁻² during 24 h of reaction, and a specific electric energy consumption of 1530 kW h ton^-1 of GAC was obtained. The best results were obtained using the packed bed reactor with a divided cell and the GAC in the cathodic compartment. The present results were attributed to an improvement in the desorption caused by the local alkaline pH in the cathodic compartment, to the contribution of the electrochemical oxidation by the hydroxyl radical, and, in parallel, to the chemical oxidation of the organic compounds by the oxidizing species formed from the chloride ion. It was also found that the electrochemical regeneration process has a negative effect on the GAC integrity after three cycles of continuous regeneration.

使用掺硼金刚石（BDD）阳极评估了用于再生颗粒状活性炭（GAC）的电化学过程的性能。在反应器中测试了三种不同的配置：流化床，带分隔室的填充床和带未分隔室的填充床。使用的GAC预先用亚甲基蓝（MB）的合成溶液饱和。评估了三个操作参数的影响：电流密度，初始pH和反应时间以及NaCl作为电解质。在反应24小时内，电流密度为6 mA cm ^-2时，再生效率（REs）达到76％±2 ，单位电耗为1530 kW h ton ^-1获得GAC。使用带分隔室的填充床反应器和阴极室中的GAC可获得最佳结果。本发明的结果归因于由阴极室中的局部碱性pH引起的解吸的改善，归因于羟基自由基的电化学氧化的贡献，并且同时归因于有机化合物通过氧化的化学氧化。由氯离子形成的物种。还发现，在连续再生的三个循环之后，电化学再生过程对GAC的完整性具有负面影响。