| Summary: | 博士 === 東海大學 === 環境科學與工程學系 === 106 === Heterogeneous catalytic ozonation is a novel type of AOPs to promote the capacity of oxidation. Co3O4 catalyst can catalyze ozone to generate free radicals and then achieve mineralization of dissolved organics effectively in water. Co3O4 could be supported on magnetic Fe3O4/SiO2 for recovery. The presence of Co3O4 catalyst during ozonation at pH 5 as well as Mn-Pd catalyst at pH 11 results in the production of hydroxyl radicals, which acts as strong oxidants and react with organic pollutants. Catalyst which is covered by surface hydroxyl groups will be protonated or deprotonated when pH of solution is below or above pHpzc. Catalytic ozonation of Methylene Blue and Diclofenac had the optimal condition of pH at 5 in accordance with pH of solution closed to pHpzc, which can reach the activity of catalysts to generate more hydroxyl radicals. The surface hydroxyl groups of catalysts will be generated and revealed in solution to be ●OH which is more powerful oxidant. Dosage of from 1.0 increased to 2.0 g/L, the TOC removal had not enhancement apparently. The enhanced generation of H2O2 in the catalytic ozonation has evidence for the development of DCF degradation. The TOC was insignificant decreased after 30 minutes in COP of pH5 and pH11. In SOP of pH5, the maximum yield of H2O2 that was generated 2.28 at 60 minutes and it was the lowest of all reaction.
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