纳米α-MnO2催化臭氧氧化降解水中双酚A

采用水热法制备了纳米α-MnO₂催化剂，并通过XRD和SEM技术对催化剂的成分和形貌进行了表征。采用纳米α-MnO₂催化剂催化臭氧氧化降解水中的双酚A（BPA），考察了初始溶液pH、催化剂加入量和反应温度对BPA去除率的影响。实验结果表明，纳米α-MnO₂催化剂催化臭氧氧化降解BPA的最佳工艺条件为：催化剂加入量100 mg/L，初始溶液pH 8.5，反应温度18 ℃。在此最佳条件下处理质量浓度为10 μg/mL的BPA溶液120 min，BPA去除率为96.4%。回收洗涤后第二次使用的催化剂的BPA去除率为80.5%，第三次使用的催化剂的BPA去除率为74.1%，催化剂的活性随重复使用次数的增加而缓慢降低，活性较稳定。

Degradation of Bisphenol A in Water by Nano α-MnO2 Catalytic Ozonation

The nano α-MnO₂ catalyst was prepared by hydrothermal method and characterized by XRD and SEM. Bisphenol A（BPA） in water was degraded by catalytic ozonation on the nano α-MnO₂ catalyst, and the affecting factors were studied. The optimum process conditions are as follows：catalyst dosage 100 mg/L,initial solution pH 8.5,reaction temperature 18 ℃. When the BPA solution with 10 μg/mL of mass concentration was treated under these conditions for 120 min,the BPA removal rate is 96.4%. When the recovered and washed catalyst is reused for the second and third times,the BPA removal rates are 80.5% and 74.1% respectively. It indicates that the activity of the catalyst is relatively stable.