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采用溶胶凝胶法制备了磁性催化剂铁酸钴(C0Fe2O4),借助于X射线衍射(XRD)、扫描电子显微镜(SEM)、BET比表面积、磁滞回线(VSM)等手段对催化剂进行表征.以甲基橙溶液模拟染料废水,开展了C0Fe2O4催化活化过一硫酸氢钾(PMS)降解甲基橙的实验研究.考察了催化剂用量、PMS的浓度、溶液初始pH、反应温度对甲基橙降解效率的影响,得到了反应的最佳条件.当C0Fe2O4浓度为0.16 g/L,PMS浓度2.3 mmol/L,溶液初始pH为3,反应温度为25℃时,甲基橙的降解效率可达89.96％.通过查阅相关文献及X射线光电能谱分析(XPS)推测了甲基橙的降解机理.“,”The magnetic heterogeneous catalyst of cobalt ferrite (C0Fe2O4) was prepared usiag sol-gel method and was characterized by X-ray diffraction (XRD),scanning electron microscope (SEM),BET method and hysteresis loop.The experiment of degradation methyl orange with peroxymonosulfate (PMS) solution catalyzed by C0FE2O4 was conducted in laboratory scale.The effect of the amount of catalysts,the concentration of PMS,the pH of initial solution and the reaction temperature to methyl orange degradation efficiency was investigated,and the optional experimental conditions were obtained.When the concentration of C0Fe2O4 and PMS was 0.16g/L and 2.3mmol/L respectively,the pH of initial solution was 3 and the reaction temperature was 25 ℃,The degradation efficiency of methyl orange could reach at 89.96％ within 2min.Finally,the mechanisms of degradation methyl orange with PMS solution catalyzed by C0Fe2O4 were speculated on the basis of XPS results and literatures.