Study on the treatment of azo dye Reactive Black B and phenol by Photo-Fenton method

• Main Authors: Hung-Chih Tsai, 蔡宏志
• Other Authors: Yao-Hui Huang
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/22887989218114157898

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.