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采用活性炭纤维作为电-Fenton反应的充氧阴极来降解水中活性艳红染料X3B,运用扫描电镜、紫外可见光谱、总有机碳分析等手段系统考察了电极形貌、底物吸附、铁离子初始价态、曝气等影响因素.实验结果表明,X3B在活性炭纤维表面的吸附符合Langmuir等温吸附模型,而X3B的电-Fenton降解反应则符合准一级反应动力学;通入空气能显著提高X3B的降解反应速率和矿化率,铁离子价态对此则无明显影响;X3B能被有效矿化,210min内矿化率为75.9%,表观电流效率达57.2%.
The activated carbon redox dye X3B was degraded by using activated carbon fiber as electroxidation cathode in electro-Fenton reaction. The morphology of the electrode, the adsorption of substrate and the initial price of iron ion were systematically investigated by scanning electron microscopy, UV-visible spectroscopy and total organic carbon analysis. Aeration and other factors.The experimental results show that the adsorption of X3B on the surface of activated carbon fiber accords with the Langmuir isothermal adsorption model and the electrokinetic-Fenton degradation reaction of X3B accords with the quasi-first order reaction kinetics. Degradation reaction rate and mineralization rate, ferrous ion valence have no significant effect on this; X3B can be effectively mineralized, mineralization rate of 75.9% within 210min, the apparent current efficiency of 57.2%.