Dye Decomposition Kinetics by UV/H2O2
| Autor: | Chia-Chun Chung, 鍾佳君 |
|---|---|
| Rok vydání: | 2006 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 94 The wastewater from textile industries containing non-biodegradable and toxic organic compounds is one important sources of environmental contamination. Many researches show that advanced oxidation processes (AOPs) can treat organic contaminants by generating hydroxyl radical possessing mighty oxidation ability to decompose the contaminants non-selectively. In order to design an AOP, the reaction kinetic model for the specific pollutant is necessary information. This study aims at investigating the decomposition of acid azo dye by UV/H2O2 process under varying experimental conditions such as agitation speed, hydrogen peroxide concentration, dye concentration, reaction temperature, initial pH, and UV irradiation power. The results show that the dye decomposition rate increases with increasing agitation speed up to 300 rpm and remains constant beyond 300 rpm; the reaction rate increases with increasing initial hydrogen peroxide concentration, initial dye concentration, or temperature to a certain point and then decreases with further increase in the above factors; the reaction rate remains almost constant at lower pH and then decreases with increasing pH; the reaction rate almost linearly increases with increasing UV irradiation power. An empirical rate equation has been developed and used to fit the experimental data successfully. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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