After reaction with permanganate or ferrate, the resulted Mn-loaded and Fe-loaded biochar (MnOx/biochar and FeOx/biochar) exhibited excellent catalytic ozonation activity. O₃ (2.5 mg/L) eliminated 48% of atrazine (ATZ, 5 μM) within 30 min at pH 7.0, while under identical conditions, ozonation efficiency of ATZ increased to 83% and 100% in MnOx/biochar and FeOx/biochar (20 mg/L) heterogeneous catalytic systems, respectively. Radical scavenger experiment and electron paramagnetic resonance (EPR) analysis confirmed that hydroxyl radical (•OH) was the dominant oxidant. Total Lewis acid sites on MnOx/biochar and FeOx/biochar were 3.5 and 4.1 times of that on the raw biochar, which induced enhanced adsorption of O₃ and its subsequent decomposition into •OH. Electron transfer via redox pairs on MnOx/biochar and FeOx/biochar was observed by cyclic voltammetry scans, which also functioned in the improved catalytic capacity. Degradation pathways of ATZ in MnOx/biochar and FeOx/biochar ozonation systems were proposed, with 34.6% and 44.8% of dechlorination effect accomplished within 30 min of reaction, which was improved by 4.1 and 5.3 times compared to pure ozonation. After 12-hour treatment, acute toxicity of ATZ oxidation products was reduced from 38.3% of pure ozonation system to 14.5% and 6.3% of activated ozonation systems with MnOx/biochar and FeOx/biochar, respectively. Mn-loaded biochar and Fe-loaded biochar have great potential for heterogeneous catalytic ozonation of polluted water.

与高锰酸盐或高铁酸盐反应后，生成的锰负载和铁负载生物炭（MnOx /生物炭和FeOx /生物炭）表现出极好的催化臭氧化活性。在pH 7.0的情况下，O ₃（2.5 mg / L）在30分钟内消除了48％的A去津（ATZ，5μM），而在相同条件下，在MnOx /生物炭和FeOx /生物炭中，ATZ的臭氧化效率分别提高至83％和100％ （20 mg / L）均相催化系统。自由基清除剂实验和电子顺磁共振（EPR）分析证实，羟基自由基（•OH）是主要氧化剂。MnOx /生物炭和FeOx /生物炭上的总路易斯酸位分别是生生物炭上的3.5和4.1倍，这导致O _3的吸附增强并随后分解为•OH。通过循环伏安扫描观察到了经由氧化还原对在MnOx /生物炭和FeOx /生物炭上的电子转移，这也有助于提高催化能力。提出了ATZ在MnOx /生物炭和FeOx /生物炭臭氧化系统中的降解途径，在30分钟的反应时间内完成了34.6％和44.8％的脱氯效果，与纯臭氧化相比分别提高了4.1和5.3倍。经过12小时的处理后，使用MnOx /生物炭和FeOx /生物炭分别将ATZ氧化产物的急性毒性从纯臭氧处理系统的38.3％降低到活化臭氧处理系统的14.5％和6.3％。锰负载生物炭和铁负载生物炭在污水的非均相催化臭氧氧化方面具有巨大潜力。