Department of Safety, Health and Environmental Engineering, National Kaohsiung First University of Science and Technology, Taiwan.
J Environ Manage. 2018 Jan 15;206:507-515. doi: 10.1016/j.jenvman.2017.10.042. Epub 2017 Nov 8.
Three commonly used dyes, Acid Red-114 (AR-114), Reactive Black-5 (RB-5), and Disperse Black EX-SF (DB-EX-SF), were treated in a pH-neutral liquid with ultraviolet (UV) light by two reactive methods: photocatalysis with titanium dioxide (TiO), and/or chemocatalysis with hydrogen peroxide (HO) as the oxidant and various ferrous-based electron mediators as catalysts. Important factors for dye oxidation were determined through bifactorial experiments. The optimum combinations and doses of the three key reagents, namely TiO, HO, and EDTA-Fe, were also determined. The degradation kinetics of the studied dyes at their optimum doses reveal that the oxidation reactions are pseudo-first-order in nature, and that certain dyes are selectively degraded more by one method than the other. The overall results suggest that co-treatment using more than one oxidative method is beneficial for the treatment of wastewater from dyeing processes.
三种常用染料，酸性红 114（AR-114）、活性黑 5（RB-5）和分散黑 EX-SF（DB-EX-SF），在中性 pH 值的液体中用两种反应方法进行处理：用二氧化钛（TiO）进行光催化，和/或用双氧水（HO）作为氧化剂和各种亚铁基电子介体作为催化剂进行化学催化。通过双因素实验确定了染料氧化的重要因素。还确定了三种关键试剂，即 TiO、HO 和 EDTA-Fe 的最佳组合和剂量。在最佳剂量下，研究的染料的降解动力学表明，氧化反应本质上是准一级反应，某些染料被一种方法比另一种方法更有选择性地降解。总体结果表明，使用多种氧化方法联合处理有利于处理染色过程产生的废水。
