| Summary: | 碩士 === 中原大學 === 化學工程研究所 === 106 === Since industrial revolution, technology has continuously improved, and the population has grown tremendously. The problem of water pollution is getting worse. The Fenton Process is the most commonly method used in factories to do the water treatment. It has the advantage of lower cost and more effective than other water treatment processes. However, this process still has a problems of secondary pollution. The Fe2+ will produce the Fe (OH)3 through the reaction or the pH value change. This problem is not only reduces the effectiveness of this process, but also disobeys the main purpose of water treatment to reduce pollution.
Advanced Oxidation Processes (AOPs), which follow the Fenton Process, uses catalyst react with oxidants to generate free radicals with a high redox potential. AOPs use this advantage to degrade and remove pollutants from waste water. The advanced oxidation processes also combine the concept of a heterogeneous catalyst to avoid secondary pollution.
In this experiment, we use epoxide-initiated gelation method to prepare the CuFe2O4 spinel metal oxide aerogel. The CuFe2O4 metal oxide is a material often used to catalyze hydrogen peroxide. Spinel structure also has good photocatalytic, electrical and magnetic properties. Moreover, it can generate smaller energy gap oxides, combined with the characteristics of metal oxides, and provide catalysts with better advanced oxidation processes performance. In addition, high specific surface area and high porosity of aerogel can further enhance the above advantages. In this study we also compare iron oxide aerogel and traditional precipitation methods of spinel CuFe2O4 nanoparticle. We also discuss other operating parameters, including: dye concentration, oxidant concentration, catalyst concentration, lighting conditions, type of dye, and pH value in system. Finally, in a 10 ml /10 ppm of rhodamine B, 3.5 wt % of hydrogen peroxide and 3800 ppm of CuFe2O4 spinel metal oxide aerogel as a catalyst, then the performance of an advanced oxidation processes with high efficiency and stability.
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