Dipartimento di Ingegneria Meccanica, Chimica, e dei Materiali, Università degli Studi di Cagliari, Via Marengo 2, 09123, Cagliari, Italy.
Dipartimento di Ingegneria Meccanica, Chimica, e dei Materiali, Università degli Studi di Cagliari, Via Marengo 2, 09123, Cagliari, Italy.
Chemosphere. 2020 Jun;248:125938. doi: 10.1016/j.chemosphere.2020.125938. Epub 2020 Jan 21.
An experimental investigation is here presented on the photo-electrochemical removal of Methyl Orange (MO), selected as a model of the organic dyes, contained in wastewaters. The process is carried out in an electrochemical flow reactor, in which titania nanotubular electrode is irradiated with a simulated solar light. Design of Experiments (DOE) technique is used to plan the experimental campaign and investigate on the single and combined effects of applied current, electrolyte flow rate, and initial MO concentration, on the specific reaction rate. The results of the DOE analysis, also combined with the study of the distribution of the intermediate products, confirm a reaction mechanism mediated by OH radicals; high applied current and low reactant concentration resulted as favourable conditions to achieve high specific reaction rate of color removal.
本文对光电化学去除废水中的甲基橙（MO）进行了实验研究。MO 被选为有机染料的模型化合物。该过程在电化学流动反应器中进行，其中二氧化钛纳米管电极受到模拟太阳光的照射。实验设计（DOE）技术用于规划实验，并研究电流、电解质流速和初始 MO 浓度对特定反应速率的单一和综合影响。DOE 分析的结果，结合中间产物分布的研究，证实了一种由 OH 自由基介导的反应机制；高电流和低反应物浓度是实现高比色去除反应速率的有利条件。
