Magnetic Fe–Mn oxides composite prepared by a chemical co-precipitation method was used as a heterogenous peroxydisulfate (PDS) catalyst for the decomposition of aniline. The catalyst was investigated by X-ray diffraction (XRD) while morphologies of powders were monitored by scanning electron microscope (SEM) and transmission electron microscopy (TEM). The catalytic performance was evaluated including the PDS concentration, catalyst dosages, solution pH value, reaction temperature and reusability. Furthermore, the mechanism of the composite activating PDS was explored through free radical quenching experiment. The result demonstrated that the degradation process kinetic well correlated to the pseudo-first order reaction kinetics. The pseudo-first order rate constant was markedly influenced by the catalyst loading and reaction temperature. The catalyst exhibited good stability, which favored the catalyst to be reused from aquatic environment.

通过化学共沉淀法制备的磁性Fe-Mn氧化物复合材料用作苯胺分解的非均相过氧二硫酸盐（PDS）催化剂。通过X射线衍射（XRD）研究催化剂，同时通过扫描电子显微镜（SEM）和透射电子显微镜（TEM）监测粉末的形态。评估了催化性能，包括PDS浓度，催化剂用量，溶液pH值，反应温度和可重复使用性。此外，通过自由基猝灭实验探索了复合材料活化PDS的机理。结果表明，降解过程动力学与拟一级反应动力学相关。拟一级反应速率常数受催化剂负载量和反应温度的影响很大。