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Catalytic wet air oxidation (CWAO) is an efficient wastewater treatment technique. It disposes organics into H2O, CO2 and N2 at high temperature and O2 pressure in a pressure-tight container. However, the high pressure (1-5 MPa) and high temperature (80-180℃) needed for its operation which limits its application in industry widely. Catalyst is the key to a CWAO process, seeking an effective catalyst is the challenge for the study.1. The preparation and characterization of the catalysts for treatment of dye wastewater by CWAO. The results are listed as follows:(1) Using H3PMo12O40 as precursor, we have prepared Zn1.5PMo12O40 composite materials with nanotube structure by impregnation method and biological template. And it was characterized by elements analysis, IR, XRD, UV, SEM and TEM.(2) Using H3PMo12O40 as precursor, we have prepared O/MoO3 composite materials with nanotube structure by impregnation method and biological template. And it was characterized by elements analysis, IR, XRD, UV, SEM and TEM.(3) Using H3PW12O40 as precursor and combined with SiO2, we have prepared ZnO/MoO3/SiO2 composite materials with macroporous structure by sol-gel technology and biological template approach. And it was characterized by elements analysis, IR, XRD, UV, SEM and TEM.(4) Using (NH4)6Mo7O24 as precursor and combined with CeO2, we have prepared MoO3:Ce nanofiber material by electrospining technology. And it was characterized by elements analysis, IR, XRD, UV, SEM and TEM.2. Operation condition was investigated for treatment of dye wastewater by CWAO.For know the specific effect to dispose dye wastewater, we make up relevant simulative Safranin-T (ST) wastewater,under air at room temperature and atmospheric pressure was studied as a model experiment to evaluate CWAO degradation effect.
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