Peroxymonosulfate activation via heterogeneous catalyst was broadly applied for the treatment of PPCPs. In this work, a novel material of Epigallocatechin-3-gallate (EGCG) fuctionalized Mn₃O₄ nano-octahedra (E@MO) was synthesized and utilized for the degradation of carbamazepine. Various technologies such as X-ray diffraction, Fourier transform-infrared spectroscopy, Scanning electron microscope, Transmission electron microscope, Brunauer-Emmett-Teller and X-ray photoelectron spectroscopy were employed for the characterization of the as-synthesized catalyst. The results depicted that under the conditions of CBZ concentration 5 mg/L, PMS concentration 1 mM, catalyst dosage 0.2 g/L, initial pH 5.8 and 25 °C, the targeted pollutant could be totally degraded in 60 min with a rate constant of 0.0622 min⁻¹. When temperature raised to 45 °C, CBZ was removed completely in 20 min and the rate constant (0.1668 min⁻¹) was 2.59 times than that of 25 °C, implying the degradation process was an endothermic reaction. Scavenging experiments and EPR analysis confirmed the main reactive oxygen species generated in the reaction were sulfate radical (SO₄^•) and hydroxyl radical (^•OH), while SO₄^• serviced as the leading role. Due to the reduction property of EGCG, compared with bare Mn₃O₄, the CBZ degradation was markably enhanced and the degradation reaction were accurately matched with the pseudo first-order kinetics equation. The possible twelve intermediates produced in the decomposition of CBZ were identified by HPLC-MS/MS, their ecotoxicity were evaluated and compared by ECOSAR model. Together with the consequences, the degradation mechanism of CBZ in the E@MO/PMS system was propounded.

通过多相催化剂活化过硫酸盐被广泛应用于 PPCPs 的处理。在这项工作中，表没食子儿茶素-3-没食子酸酯 (EGCG) 功能化 Mn ₃ O ₄的新型材料纳米八面体（E@MO）被合成并用于降解卡马西平。X射线衍射、傅里叶变换红外光谱、扫描电子显微镜、透射电子显微镜、Brunauer-Emmett-Teller和X射线光电子能谱等各种技术用于表征合成的催化剂。结果表明，在CBZ浓度5 mg/L、PMS浓度1 mM、催化剂用量0.2 g/L、初始pH 5.8和25℃条件下，目标污染物可在60 min内完全降解，速率常数为0.0622 分钟^-1。当温度升至 45 °C 时，CBZ 在 20 min 内完全去除，速率常数 (0.1668 min ^-1) 是 25 °C 的 2.59 倍，表明降解过程是吸热反应。清除实验和EPR分析证实反应中产生的主要活性氧物质是硫酸根(SO ₄ ^• )和羟基自由基( ^• OH)，而SO ₄ ^•起主导作用。由于 EGCG 的还原性，与裸 Mn ₃ O _{4 相比}，CBZ降解显着增强，降解反应与伪一级动力学方程准确匹配。通过HPLC-MS/MS鉴定了CBZ分解过程中可能产生的12种中间体，并通过ECOSAR模型对它们的生态毒性进行了评价和比较。连同结果，提出了CBZ在E@MO/PMS系统中的降解机制。