• 关键词：Ce-Mn/Al₂O₃催化剂  非均相类Fenton体系  皮革废水  响应曲面模型

• 基金项目：

• 陈磊
• 华南理工大学环境与能源学院, 广州 510006

• 张杰
• 华南理工大学环境与能源学院, 广州 510006

• 龙琦
• 华南理工大学环境与能源学院, 广州 510006

• 张碗林
• 华南理工大学环境与能源学院, 广州 510006

• 黄瑞敏
• 华南理工大学环境与能源学院, 广州 510006

• 摘要：以浸渍法制备了Ce-Mn/Al₂O₃催化剂，研究该催化剂在H₂O₂非均相类Fenton体系中对皮革废水污染物的催化降解性能.在单因素试验的基础上，以COD去除率为响应值，采用Box-Behnken响应曲面法考察了催化剂投加量、H₂O₂投加量、初始pH、反应时间等4个因素之间的单独作用及交互作用，实验数据用Design-Expert 8.0.6软件进行处理，得到二次响应曲面模型.结果表明，4个独立变量对响应值的影响顺序如下：初始pH > H₂O₂投加量 > 催化剂投加量 > 反应时间，数学模型拟合度高（R_adj²=0.9349），利用该模型预测的最大COD去除率为78.86%，最佳反应条件为：催化剂投加量56.63 g·L^-1，H₂O₂投加量315.15 mg·L^-1，初始pH3.51，反应时间2 h，经实验验证COD去除率为80.94%，与模型预测值偏差2.08%.

• Abstract：The Ce-Mn/Al₂O₃ was prepared with an impregnation method and was used as catalyst in H₂O₂ heterogeneous Fenton-like system for the degradation of pollutants in tannery wastewater. Based on the single factor tests, the Box-Behnken response surface methodology was utilized to evaluate the simple and combined effects of catalyst dosage, H₂O₂ dosage, initial pH and reaction time on the COD removal efficiency. Data analysis was conducted with Design-Expert 8.0.6, and the quadratic response model was developed. The results show that the significance of influence factors follow the order:initial pH > H₂O₂ dosage > catalyst dosage > reaction time. Furthermore, the model well fits the experimental results (R_adj²=0.9349). From the model, the maximum COD removal efficiency was 78.86%, under the optimized condition with a catalyst dosage at 56.63 g·L^-1, H₂O₂ dosage at 315.15 mg·L^-1, initial pH 3.51 and the reaction time of 2 h. The experiment under such condition obtained a COD removal of 80.94%. The experimental value agreed well with the predicted value with 2.08% deviation.

• Key words：Ce-Mn/Al₂O₃ catalyst  heterogeneous Fenton-like system  tannery wastewater  response surface model

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