Effect of Calcination Temperature over the Performance of Mn-Ce-O on the Catalytic Ozonation of Olive Mill Wastewater

ABSTRACTThe effect of calcination temperature on Mn-Ce-O 70/30 characteristics, activity and stability was investigated when this catalyst was applied on the catalytic ozonation of a phenolic mixture. Two crystalline phases (cubic CeO2 and tetragonal Mn3O4) were observed by X-ray diffraction analysis, which also showed an increase of crystallinity with temperature. The material prepared at 300 oC was the most efficient regarding TPh (100%), TOC (80%) and COD (62%) removal, as well as revealed to be the one leading to the lowest amount of Mn leached. The generalized kinetic model (GKM) was able to describe mineralization during this catalytic process with relative errors of ±10%.