Study on Treatment of Phenolic Solutions by the Fenton-Like process

• Main Authors: Yao-Sheng Huang, 黃耀盛
• Other Authors: none
• Format: Others
• Language: zh-TW
• Published: 2005
• Online Access: http://ndltd.ncl.edu.tw/handle/20991723072792199307

碩士 === 嘉南藥理科技大學 === 環境工程與科學系暨研究所 === 93 === Catalysts with various metals supported on γ-Al2O3 were used to implement the catalytic wet peroxide oxidation (CWPO) of phenolic wastwater. The performance was evaluated and the catalytst was characterized. For the catalytsts used, the Cu/γ-Al2O3 performed best. Using Cu/γ-Al2O3, activation energy of phenol oxidation can be noticeably lowed, rendering to milder operating conditions and lower cost. Blank tests revealed that with only H2O2 or catalytsts, rate of phenol oxidation was negligible. On the other hand, at the conditions of 0.25 g/L 15-5% wt Ce-Cu/γ-Al2O3 catalytsts, 1200ppm H2O2 and 40℃reaction temperature, 500mg/L phenol could attain 90% phenol coversion and 50% COD removal after 3 hours CWPO reaction. Note that activity of regenerated catalytsts is lower than that of fresh one, may be caused by the deposit of carbonaceous compounds and leaching of active Cu2+ ion. Nevertheless, regeneration of used catalytst can partly remove the deposited carbon and leaching of Cu2+ ion is singnifcatly reduced when the regenerated catalytst was used . Cataysis via leached Cu2+ can not be ruled out. In this study,the suitable operating conditions are concluded as follows: catalytst loading: 0.25g/L~0. 5g/L; H2O2 loading: 800~1200ppm; reaction temperature:40~60℃;pH valuve:3~5