手机知网 App
24小时专家级知识服务
打 开
手机知网|搜索

UV/TiO_2 and UV/TiO_2-Film for Degradation of Textile Dyes

叶玉莉

  This research focuses on the feasibility and treatment efficiency of Advance Oxidation Process(AOP)-UV/TiO_2 for three different kinds of simulated dye wastewater(FBL,FBB and S-RL).The first part of this study investigates the treatment of simulated dye wastewater with UV/TiO_2 by changing TiO_2 dosages,TiO_2 particle sizes and dye concentrations.The efficiency is measured by color removal and TOC removal.The optimum conditions obtained for treatment of different dye wastewater are different.The treatment of Indanthrene red(FBB) by UV/TiO_2 is the best,with 99.68%of TOC removal percentage and nearly 100%of color removal while treatment of FBL with 96.11%of TOC removal and almost 100%of color removal.The removal efficiency is lowest for S-RL dye solution with 81.88%of TOC and 95.87%for color removal.Both Langmuir adsorption isotherm and modified Langmuir-Hinshelwood kinetic model(modified L-H model) were fitted to the experimental data and were able to correlate the adsorption patterns and the kinetics of the dyes studied.Since the photocatalysts(TiO_2) used are nano-sized powder and is difficult to separate from the wastewater,the second part of this research focuses on the preparation of TiO_2-film on glass-substrate and the treatment of simulated FBL dye wastewater by UV/TiO_2-film oxidation then followed.The experimental results showed the TiO_2-films are suitable only for the dye wastewater treatment in low concentration.……