期刊
CHEMOSPHERE
卷 248, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2020.125938
关键词
Advanced oxidation; Photo-electrochemical degradation; Azo-dyes; Design of experiments; TiO2 nanotubes
资金
- P.O.R. SARDEGNA F.S.E. 2014-2020 -Asse III Istruzione e Formazione, Obiettivo Tematico: 10, Obiettivo Specifico: 10.5, Azione dell'accordo di Partenariato:10.5.12 Avviso di chiamata per il finanziamento di Progetti di ricerca e Anno 2017
- Sotacarbo S. p.A CEEP-2 Project [CUP D83C17000370002]
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 center dot OH radicals; high applied current and low reactant concentration resulted as favourable conditions to achieve high specific reaction rate of color removal. (C) 2020 Elsevier Ltd. All rights reserved.
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