Electrochemical oxidation of azo dyes in water: a review

Pollution of waters by azo dyes is a major global issue because some azo dyes have carcinogenic and mutagenic effects. Therefore, advanced methods are required to remove those pollutants from wastewater. For instance, electrochemical oxidation processes have been developed using various approaches t...

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Bibliographic Details
Published in:Environmental chemistry letters 2023-10, Vol.21 (5), p.2863-2911
Main Authors: Isaev, Abdulgalim B., Shabanov, Nabi S., Magomedova, Asiyat G., Nidheesh, P. V., Oturan, Mehmet A.
Format: Article
Language:English
Subjects:
Analytical Chemistry
Anodizing
Azo dyes
Carboxylic acids
Carcinogens
Chemistry
Degradation
Degradation products
Design
Design parameters
Dyes
Earth and Environmental Science
Ecotoxicology
Electrochemical oxidation
Electrochemistry
Environment
Environmental Chemistry
Environmental Sciences
Geochemistry
Low molecular weights
Molecular weight
Oxidation
Pollutants
Pollution
Review Article
Toxicity
Wastewater
Water pollution
Water treatment
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Summary:Pollution of waters by azo dyes is a major global issue because some azo dyes have carcinogenic and mutagenic effects. Therefore, advanced methods are required to remove those pollutants from wastewater. For instance, electrochemical oxidation processes have been developed using various approaches to remove azo dyes from wastewater. Here, we review electrochemical processes for the oxidative degradation of azo dyes. Processes include anodic oxidation, electro-Fenton, photo-electro-Fenton, and solar photo-electro-Fenton. The influence of various parameters including process design, design of reactors, and the characteristic degradation products and their toxicity, are discussed. Low molecular weight carboxylic acids are mainly formed as by-products.
ISSN:1610-3653
1610-3661
DOI:10.1007/s10311-023-01610-5