Highly efficient oxidation, as non-thermal regeneration technology, is a promising method to solve the regeneration problem of spent activated carbon (AC) in wastewater treatment. In this study, FeOCl was confined into activated carbon (FeOCl/AC) for catalytic oxidation of contaminants on AC during the regeneration process. The characterization results of FeOCl/AC showed that amorphous FeOCl was distributed in micropores, mesopores and macropores of AC. The methylene blue (MB)-adsorbed FeOCl/AC had a regeneration efficiency of 93.7 % at neutral pH in the presence of H₂O₂, much higher than 46.9 % by Fenton oxidation and 33.7 % by H₂O₂ oxidation. Meanwhile, the spent FeOCl/AC after the adsorption of atrazine, 2,4-dichlorophenol, and ofloxacin had the regeneration efficiencies of 71.5 %, 86.4 %, and 100 %, respectively. Moreover, the regeneration efficiency still reached 87 % in the fifth adsorption-regeneration cycle, and was linearly decreased with the increase of adsorbed amounts of MB. During 6 h regeneration of spent FeOCl/AC, 97 % of adsorbed MB was degraded. Electron paramagnetic resonance and radical trapping experiments indicated that both superoxide and hydroxyl radicals were involved in MB oxidation during the regeneration process.

高效氧化作为非热再生技术，是解决废水处理中废活性炭（AC）再生问题的一种很有前景的方法。在这项研究中，FeOCl 被限制在活性炭 (FeOCl/AC) 中，用于在再生过程中催化氧化 AC 上的污染物。FeOCl/AC的表征结果表明，无定形FeOCl分布在AC的微孔、中孔和大孔中。亚甲基蓝 (MB) 吸附的 FeOCl/AC 在 H ₂ O ₂存在下在中性 pH 条件下的再生效率为 93.7 % ，远高于 Fenton 氧化法的 46.9 % 和 H ₂ O _{2法的 33.7 %}氧化。同时，废FeOCl/AC吸附阿特拉津、2,4-二氯苯酚和氧氟沙星后的再生效率分别为71.5%、86.4%和100%。此外，在第五次吸附-再生循环中再生效率仍达到87%，且随着MB吸附量的增加呈线性下降趋势。在用过的 FeOCl/AC 再生 6 小时期间，97% 的吸附 MB 被降解。电子顺磁共振和自由基捕获实验表明，在再生过程中，超氧化物和羟基自由基都参与了 MB 的氧化。