Electrochemical oxidation (EO) and activated carbon (AC) adsorption are, despite difference in maturation and market dissemination, both well-proven water treatment principles for the abatement of micropollutants. Both technologies suffer some drawbacks as mass transfer limitations (in case of EO) and poor adsorption affinity of some compounds (in case of AC). Granular active carbon may, when placed within an electric field, be polarized generating particulate reactive microelectrodes in bulk solution increasing the overall active electrode area, a concept known as 3D electrochemistry. In this paper, a potential synergy by combining EO and AC was studied in a potentiostatic batch setup at different applied electric field strengths (25–500 V/m), using boron-doped diamond (BDD) as active anode and the hydroxyl radical probe compound p-nitrosodimethylaniline (RNO) and the groundwater contaminants 2-methyl-4-chlorophenoxy acetic acid (MCPA), 2-methyl-4-chlorophenoxy propionic acid (MCPP or mecoprop) and 2,6-benzamide (BAM) as target model contaminants. Synergy was assessed based on comparison of the 3D process with removal kinetics in conventional 2D electrochemical process and pure AC adsorption. In demineralized water model solutions, synergies of 121–126% was found for RNO, MCPA and MCPA at 375 V/m electric field strength and w/w AC:organic ratio of 5:1. For BAM, the synergy was 192%, primarily due to stronger AC adsorption affinity. The study showed interesting perspectives of this treatment concept that needs to be pursued and studied in matrices of higher complexity.

尽管在成熟度和市场传播方面有所不同，但电化学氧化（EO）和活性炭（AC）的吸附均是用于减少微污染物的行之有效的水处理原理。两种技术都有一些缺点，如传质限制（在EO的情况下）和某些化合物的吸附亲和力差（在AC的情况下）。颗粒状活性炭，当放置在电场中时，可能会极化，从而在整体溶液中生成颗粒状反应性微电极，从而增加了整个活性电极的面积，这一概念被称为3D电化学。本文以掺硼金刚石（BDD）作为活性阳极和羟基自由基探针，在不同施加电场强度（25–500 V / m）的恒电位批量设置中，研究了将EO和AC结合使用的潜在协同作用。化合物对亚硝基二甲基苯胺（RNO）和地下水污染物作为目标模型污染物，其中2-甲基-4-氯苯氧基乙酸（MCPA），2-甲基-4-氯苯氧基丙酸（MCPP或甲丙酸）和2,6-苯甲酰胺（BAM） 。基于3D工艺与常规2D电化学工艺中的去除动力学和纯AC吸附的比较，评估了协同作用。在软化水模型解决方案中，在375 V / m电场强度和w / w AC：有机比例为5：1的情况下，RNO，MCPA和MCPA的协同作用为121-126％。对于BAM，协同作用为192％，这主要是由于更强的AC吸附亲和力。研究显示了这种治疗概念的有趣观点，需要在更高复杂性的矩阵中进行研究。