The effect of dye’s chemical structure and solubility on electrochemical oxidation for dye degradation

• Main Authors: Wen-Chun Teng, 鄧文俊
• Other Authors: Luke Chen
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/59645529131995156987

碩士 === 淡江大學 === 水資源及環境工程學系碩士班 === 100 === The objective of this study is to find the effect of dye solubility and chemical structure on its degradation with electrochemical oxidation process. To find this effect can provide guideline for the choice of electrochemical process in the treatment of various dyes according to their solubility and chemical structure. In this study, the color degradation of ten dyes with various solubility and three different chemical structures, namely azo, disazo and anthraquinone were tested in electrochemical oxidation process. The tests include direct and indirect electrochemical oxidation for dye color degradation. Some COD degradation was also tested for specific dyes to explain the discrepancy in solubility dominant over chemical structure effect on dye degradation theory proposed in this study. This study concluded that the electrochemical oxidation process in the degradation of dyes is affected by its solubility more than by its chemical structure. When compared the degradation of dye with different chemical structure, the azo dye is degraded quicker than the disazo dye does, and the anthraquinone dye is the most difficult to be degraded. For those dyes with high solubility, there is no obvious difference in their degradation efficiency for all types of chemical structures. To discern the degradation variation for dyes with high solubility, the reaction kinematic constants for dyes with different chemical structures were compared. The comparison concludes that similar degradation efficiency sequence that the azo dye is quicker than disazo dye and then anthraquinone dye was found as before.