Abstract Photocatalytic degradation/decolorization of Basic Blue 41 dye assisted by UV radiation has been studied over TiO2-Fe3O4 supported by bentonite. In this experiment, photocatalytic decolorization process was performed continuously; where dye feed solution was supplied to a coated-ceramic vessel. The influence of the initial concentration, pH, and flow rate of the dye feed solution on the degradation efficiency process was examined in this study. The results showed that the increase in the dye concentration and flow rate reduces decolorization efficiency. The highest decolorization efficiency was at pH of 5.5. The kinetic study of this photo-decolorization indicated that under the experimental condition, the photocatalytic kinetic process followed first-order kinetics on the basis of Langmuir–Hinshelwood heterogeneous reaction mechanism, where the reaction rate constant, namely kr, is 0.7707 and the adsorption rate constant, namely K, is 0.01298.

中文翻译：

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连续体系中使用 TiO2-Fe3O4-膨润土涂层对碱性蓝 41 进行光催化脱色

摘要 研究了在膨润土负载的 TiO2-Fe3O4 上紫外光辅助下碱性蓝 41 染料的光催化降解/脱色。本实验中光催化脱色过程连续进行；其中染料进料溶液被供应到涂层陶瓷容器中。本研究考察了染料进料溶液的初始浓度、pH 值和流速对降解效率过程的影响。结果表明，染料浓度和流速的增加降低了脱色效率。pH 值为 5.5 时脱色效率最高。这种光脱色的动力学研究表明，在实验条件下，光催化动力学过程遵循Langmuir-Hinshelwood多相反应机理的一级动力学，