| Summary: | 碩士 === 國立成功大學 === 化學工程學系碩博士班 === 93 === This study combined Fenton’s reagent and light, called Photo-Fenton method, to treat azo dye Reactive Black B and phenol. There were two parts in this study. The first part was to evaluate the effect of pH, light, [Ox]/[Fe3+] molar ratio and dissolved oxygen on photoreduction reaction of ferric ions. The second one was to investigate the optimal operating conditions of pH, initial ferric ion concentration, hydrogen peroxide concentration, [Ox]/[Fe3+] molar ratio, dissolved oxygen and lights for treating Reactive Black B and phenol with Photo-Fenton method.
Results show that the optimal pH value was 3 for ferric ion reducing reaction. Increasing [Ox]/[Fe3+] molar ratio and UV light can accelerate reduction rate. Besides, the reduction rate was higher with N2 bubbling than that with aeration.
The optimal conditions to treat Reactive Black B with Photo-Fenton method were pH＝3 and [H2O2]＝400 mg/L. We found that increasing [Ox]/[Fe3+] molar ratio inhibited the degradation rate of Reactive Black B. The optimal [Ox]/[Fe3+] molar ratio for phenol oxidation were 2. It can be decolorized completely at this condition. Removal of COD and TOC for Black B solution were 86﹪and 86﹪ with Photo-Fenton method and those were 46﹪and 31﹪,respectively with Fenton-like method. Concerning the oxidation of phenol, the removal of COD and TOC for the solution can increase from 63﹪and 33﹪to 98﹪and 88﹪,respectively.
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