Exploiting stable and high-performance catalysts is a challenge in remediating organic pollutants (OPs) during advanced oxidation. Herein, this study reported MnFe₂O₄ decorated biochar (MnFe₂O₄/BC) as an adsorptive-catalyst for peroxymonosulfate (PMS) activation to degrade OPs. BC as support not only increased the stability and dispersibility but also decreased the particle diameter of MnFe₂O₄. We demonstrated various OPs (50 mL, 20 mg·L⁻¹) (including malachite green, bisphenol A, methylene blue, sulfamethoxazole, tetracycline, and thiacloprid) was synergistically adsorbed and oxidized within 10 min with the introduction of PMS (0.65 mM) in the MnFe₂O₄/BC system. The degradation efficiency was more than 95% after recycling six times. Results of discrete Fourier transform revealed that PMS was preferentially adsorbed on BC doping sites (−4.31 eV to −3.85 eV) and MnFe₂O₄ parts (−9.67 eV), and then the adsorbed–PMS was activated. These results confirmed that oxidation occurs through radical–induced and non–radical pathways in the MnFe₂O₄/BC system. Overall, the MnFe₂O₄/BC showed efficient performance, also this work provides a new insight for understanding of the PMS activation mechanism.

开发稳定和高性能的催化剂是在高级氧化过程中修复有机污染物 (OPs) 的挑战。在此，本研究报道了 MnFe ₂ O ₄修饰的生物炭 (MnFe ₂ O ₄ /BC) 作为过氧单硫酸盐 (PMS) 活化的吸附催化剂以降解 OPs。_{BC作为载体不仅提高了稳定性和分散性，而且降低了MnFe 2} O ₄的粒径。我们证明了各种 OPs（50 mL，20 mg·L ^-1）（包括孔雀石绿、双酚 A、亚甲蓝、磺胺甲恶唑、四环素和噻虫啉）在引入 PMS (0.65 mM) 后 10 分钟内被协同吸附和氧化在锰铁₂ O ₄ /BC体系。循环使用6次后降解效率在95%以上。离散傅里叶变换的结果表明，PMS 优先吸附在 BC 掺杂位点（-4.31 eV 至 -3.85 eV）和 MnFe ₂ O ₄部分（-9.67 eV），然后吸附的-PMS 被激活。_{这些结果证实，氧化通过 MnFe 2} O ₄ /BC 系统中的自由基诱导和非自由基途径发生。总体而言，MnFe ₂ O ₄ /BC 表现出高效的性能，这项工作也为理解 PMS 激活机制提供了新的见解。