| Summary: | 碩士 === 國立宜蘭大學 === 環境工程學系碩士班 === 98 === Particles are often too small to be separated from a reaction system and recycled, especially in wastewater treatment via a catalytic ozonation process. Thus, the objective of this study was to prepare a magnetic catalyst (SiO2/Fe3O4) that can be recycled by magnetic force. The effects of the characteristics of the magnetic catalyst, pH values, catalyst dosage, and initial concentration of Reactive Black 5 (RB5) on mineralization efficiency of the magnetic catalyst/H2O2/O3 process were also investigated. The mineralization efficiency of RB5 under various conditions followed the sequence: SiO2/Fe3O4/H2O2/O3 > SiO2/Fe3O4/O3 >Fe3O4/O3 ≈H2O2/O3 >O3 > SiO2/Fe3O4/H2O2. The recovery efficiency of the suspension SiO2/Fe3O4 by magnetic force was still > 90% for reuse. Given the results of our reuse and recovery experiments, the magnetic catalyst shows considerable promise for use in water treatment.
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