Abstract: Supported Fe₂O₃/γ-Al₂O₃ catalyst has been prepared by isopyknic impregnation method and characterized by X-ray diffraction(XRD), scanning electron microscopy (SEM) and BET. The process of Fe₂O₃/γ-Al₂O₃ catalytic oxidation used for the advanced treatment of paper-making wastewater has been studied. The influencing factors, such as reaction temperature, catalyst dosage, hydrogen peroxide dosage, etc., on the degradation effectiveness of paper-making wastewater are investigated respectively, and the optimized technological conditions for treating paper-making wastewater by catalytic oxidation have been obtained. When the reactive temperature is 70℃, mass concentration of catalyst dosage 2.5 g/L, mass concentration of hydrogen peroxide dosage 3.7 g/L, pH=8.10, and reaction time 90 min, the COD removing rate from the paper-making wastewater can reach 86.2%, chroma removing rate 98.6% above. The catalyst has high stability, the separate concentration of Fe ions is 0.08 mg/L and its reaction effects can be neglected.

Key words: Fe₂O₃/γ-Al₂O₃, catalytic oxidation, paper-making wastewater

摘要： 以等体积浸渍法制备了负载型Fe₂O₃/γ-Al₂O₃催化剂，分别采用XRD、SEM和BET对催化剂结构进行了表征。研究了Fe₂O₃/γ-Al₂O₃催化氧化深度处理造纸废水的工艺，分别考察了反应温度、催化剂加入量、H₂O₂加入量等因素对造纸废水降解效果的影响，得出较佳的催化氧化处理造纸废水的工艺条件。在反应温度为70℃，催化剂投加质量浓度为2.5 g/L，H₂O₂投加质量浓度为3.7 g/L，pH=8.10，反应时间90 min条件下，造纸废水COD去除率可达86.2%，脱色率达到98.6%以上。催化剂稳定性高，铁离子析出质量浓度为0.08 mg/L，对反应影响可以忽略。

关键词: Fe₂O₃/γ-Al₂O₃, 催化氧化, 造纸废水

CLC Number: 

• X703.1