负载型金属催化剂的制备及印染废水的催化氧化处理

采用浸渍沉淀法制备负载型金属催化剂，考察了载体种类、活性组分种类、活性组分配比（n（Fe2+）∶n（Mn2+））、浸渍液浓度（以Mn2+计）、煅烧温度和煅烧时间对催化剂性能的影响。实验结果表明：活性炭负载FexOy-MnOx型催化剂具有较高的活性；将在浸渍液浓度0.5 mol/L（以Mn2+计）、n（Fe2+）∶n（Mn2+）=1∶2、煅烧温度250 ℃，煅烧时间8 h条件下制备的催化剂用于印染废水（COD=584 mg/L、色度500倍）的处理，在臭氧流量0.8 L/min、废水pH 7、催化剂加入量40 g/L、反应时间60 min的条件下，印染废水COD的去除率为83.2%；该催化剂具有良好的稳定性，连续使用6次后的COD去除率仍可达到61.1%。

Preparation of Supported Metal Catalyst and Its Use in Treatment of Dyeing Wastewater

The supported metal catalyst was prepared by impregnation-deposition method. The factors affecting the catalyst performance were studied. The experimental results?show?that：The catalytic?activity of the activated?carbon-supported?Fe_xO_y/MnO_x?catalyst?is high；When the catalyst is prepared under the conditions of Mn²⁺ concentration in the impregnating solution 0.5 mol/L,n(Fe²⁺)∶n(Mn²⁺)=1∶2,calcination temperature 250 ℃ and calcination time 8 h,and is used to tread the dyeing wastewater with 584 mg/L of COD and 500 of chroma under the conditions of ozone flow rate 0.8 L/min,wastewater pH 7,catalyst dosage 40 g/L and reaction?time 60 min,the COD removal rate is 83.2%；After used for 6 times,the COD removal rate can still reach 61.1%,which indicates that the stability of the catalyst is good.