Abstract: To overcome some drawbacks of catalytic wet air oxidation（CWAO),higher temperature pressure is required. Mo-Mn-Al-O catalyst was prepared by co-precipitation and impregnation with Mn-Al-O as carrier and molybdate as precursor, and its catalytic activity for degradation of cationic dye wastewater under room temperature and atmospheric pressure was investigated.ICP-OES, BET, XRD and XPS were employed to characterize the Mo-Mn-Al-O catalyst.The results showed that the optimal preparation parameters were as follow：salts concentration was 1.5 mol·L^-1, dipping temperature 55℃, calcination time and temperature 3 h and 400℃ respectively.Furthermore, the degradation performance obtained for cationic dyes in wastewater cationic red GTL, cationic red X-GRL, cationic yellow X-GL and cationic blue X-BL showed that the catalytic activity of Mo-Mn-Al-O catalyst was good when amount of Mo-Mn-Al-O catalyst was 2.72 g·L^-1, it can be removed 74.8% of cationic red GTL and 64.5% of TOC after 1 h oxidation.

Key words: Mo-Mn-Al-O catalyst, cationic dye wastewater, catalytic wet air oxidation

摘要： 以Mn-Al-O为载体，钼酸盐为活性成分的前驱体，采用共沉淀-浸渍法制备出Mo-Mn-Al-O催化剂，使用ICP-OES、BET、XRD和XPS方法对其进行表征，研究其在常温常压下催化湿式氧化阳离子型染料废水的催化活性。实验结果表明，Mo的浸渍浓度为1.5 mol·L^-1、浸渍温度为55℃、焙烧时间为3 h和焙烧温度为400℃下制备出的Mo-Mn-Al-O催化剂对阳离子红GTL、阳离子红X-GRL、阳离子黄X-GL和阳离子蓝X-BL都有较好的催化性能。特别是，当催化剂投加量为2.72 g·L^-1时，反应1 h后对阳离子红GTL的脱色率和TOC去除率分别达到74.8%和64.5%。

关键词: Mo-Mn-Al-O催化剂, 阳离子型染料废水, 催化湿式氧化