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.