CATALYTIC OZONATION USING TITANIUM DIOXIDE MODIFIED PEROVSKITE IN IBUPROFEN REMOVAL AND REVERSE OSMOSIS CONCENTRATE TREATMENT

Abstract

A TiO2-modified LaMnO3 was synthesized and applied in IBP degradation and ROC treatment. 31% higher IBP mineralization and 20% higher ROC COD removal were achieved with TiO2-modified LaMnO3 compared to raw LaMnO3. The enhancement was attributed to increased surface area and promoted the generation of surface active sites (hydroxyl groups, Mn3+/Mn4+ pairs, and oxygen vacancies). These enhancements facilitated ozone adsorption onto the surface of the catalyst and generation of reactive oxygen species. TiO2-modified LaMnO3 also exhibited good stability with less leaching and higher tolerance of various operational conditions and water matrix. Applying the catalyst in real ROC treatment by catalytic ozonation reached 75% COD and 64% DOC removal under optimal conditions. Considering the energy consumed, TiO2-modified LaMnO3 is a promising catalyst in catalytic ozonation for real applications.