摘要：

采用超声浸渍法制备出La/Co/γ-Al₂O₃复合催化剂，与微波催化氧化技术联用，应用于杀螟丹模拟废水COD的降解；采用XRD、TEM、SEM、BET对催化剂进行表征，结果表明，Co/γ-Al₂O₃经La改性后团聚现象得到改善，活性组分能较为分散地负载在载体表面。实验结果表明，在pH为5.5，微波功率为450 W，催化剂投加量为0.5 g，H₂O₂投加量为0.25 mL时，La/Co/γ-Al₂O₃的催化活性最高可达88.2%，在回收再用实验中，表现出良好的稳定性。

关键词: La复合催化剂, 杀螟丹废水, 微波催化氧化, 回收再用

Abstract:

La/Co/γ-Al₂O₃ composite catalyst was prepared by ultrasonic impregnation method. It was applied to degrade COD in the simulated wastewater of cartaps in combination with microwave catalytic oxidation technology. The catalyst was characterized by XRD, TEM, SEM, BET. The results showed that the agglomeration phenomenon of Co/γ-Al₂O₃ after La modification was improved, and the active component could be dispersed on the surface of the carrier. The experimental results showed that the catalytic activity of La/Co/γ-Al₂O₃ could reach up to 88.2% at pH 5.5, microwave power 450 W, catalyst dosage 0.5 g and hydrogen peroxide dosage 0.25 mL. In the recycling experiment, the catalyst showed good stability.

Key words: La composite catalyst, cartap wastewater, microwave catalytic oxidation, recycling

中图分类号: 

• X703.1