摘要：

以γ-Al₂O₃为载体,采用浸渍-焙烧法制备了Fe₂O₃/Al₂O₃催化剂,并将其用于催化降解模拟酸性大红-3R染料废水。对于质量浓度为1 000 mg/L的高浓度酸性大红-3R染料废水,最佳的处理工艺条件为:温度60℃、pH=3.0、H₂O₂投加质量浓度9.4 g/L、催化剂投加质量浓度1.5 g/L。在此工艺条件下酸性大红染料废水的降解率为99%,COD_Cr的去除率>83%。而对于质量浓度≤100 mg/L的酸性大红-3R染料废水在此条件下的降解速率接近100%。且催化剂连续使用6次后仍有较高的催化活性。

关键词: Fe₂O₃/Al₂O₃催化剂, 催化降解, 酸性大红-3R

Abstract:

The ferric oxide catalysts have been prepared by the dipping-calcinations method with γ-Al₂O₃ used as a carrier.The catalysts are used for catalyzing/degrading simulated acidic scarlet -3R dyeing wastewater.When the mass concentration of the highly concentrated acidic scarlet-3R wastewater is 1 000 mg/L,the best treating conditions are as follows: Temperature=60 ℃,pH=3,H₂O₂ dosage concentration=9.4 g/L and catalyst dosage mass concentration=1.5 g/L.Under these conditions,the degradation rate of this kind of wastewater is 99%,and the removal rate of COD_Cr is higher than 83%.But when the mass concentration of the wastewater is less than 100 mg/L,the degradation rate is near 100%.After the catalyst is reused more than 6 times,it still has higher catalyzing activity.

Key words: Fe₂O₃ /Al₂O₃ catalyst, catalytic degradation, acidic scarlet-3R

中图分类号: 

• X703