Fe2O3／Al2O3催化剂制备条件对其催化降解含聚丙烯酰胺废水活性的影响

以Fe2O3为活性组分，γ—Al2O3为载体，采用浸渍法制备了Fe2O3／Al2O3催化剂，并将其用于催化降解模拟聚丙烯酰胺（PAM）废水考察了催化剂制备条件对催化活性的影响，得出最佳制备工艺条件为：以Fe（NO3）3水溶液为浸渍液、活性组分负载量20％、焙烧时间3h、焙烧温度500℃在温度为60℃、pH=7．0、催化剂加入量为2g／L，H2O2的质量浓度为0．6g／L的条件下对质量浓度为400mg／L聚丙烯酰胺废水进行降解，反应90min后废水中聚丙烯酰胺相对分子质量降解率最高可达90％以上，CODcr去除率达86％，显示出了较高的催化活性．Fe2O3／Al2O3催化剂经过多次重复使用，催化活性基本没有降低，使用寿命长．

Effect of Preparation Process for Fe2O3/Al2O3 Catalyst on the Catalytic Activity for Degradation of Wastewater Containing Polyacrylamide

The ferric oxide catalysts were prepared by impregnation method with γ-Al2O3 used as a carrier,Fe2O3 as the active component. The catalysts were used to catalytic oxidation of analogy polyacrylamide （PAM） wastewater. The effects of preparation process for catalyst on the catalytic activity were investigated. It was observed that the optimum conditions for catalyst preparation process：the Fe （NO3）3 aqueous solution for the impregnation fluid ,the active component loading of 20%, the calcination time is 3 h and calcination temperature was 500 ℃. 90% molecular weight of polyacrylamide and 86% CODcr is removed after 90 rain in the presence of 2 g/L Fe2O3/Al2O3 catalyst,0.6 g/L H2O2,at pH = 7.0 and t = 60 ℃. The catalyst showed high catalytic activity. After several time repeat-used ,the catalytic activity has not been reduced.