Electrochemical oxidation of Methyl Red using Ti/Ru0.3Ti0.7O2 and Ti/Pt anodes

Degradation of the azo dye Acid Red 1 by anodic oxidation and indirect electrochemical processes based on Fenton's reaction chemistry. Relationship between decolorization, mineralization and products

“…The aromatic intermediates include molecules with similar structure to the azo dye (compounds 2-4), as well as naphthalenic (compounds 5-8) and benzenic (compounds 9-12) derivatives coming from the loss or oxidation of functional groups. Acetamide (13) and aniline (14), expected to be released from these degradation reactions, were not detected by LC-MS. The further destruction of the above aromatic products is expected to yield short-chain carboxylic acids [7,8].…”

“…The most typical EAOP is anodic oxidation (AO), where adsorbed hydroxyl radical (M( • OH)) is generated from water discharge by reaction (1) at an anode (M) with high O 2 -overpotential by applying a high current [6,13,[16][17][18][19][20].…”

“…EAOPs are promising and environmentally friendly technologies that are very effective for organics degradation and easily usable and scalable [6][7][8][9][10]. Although some papers have been recently published dealing with the decolorization and removal of several azo dyes by these methods [11][12][13][14][15], much deeper information about the influence of operating parameters and generated products on the degradation processes of a high number of these pollutants is needed to clarify the possible viability of EAOPs for wastewater remediation.…”

Fabrication of cerium-doped lead dioxide anode with improved electrocatalytic activity and its application for removal of Rhodamine B

“…For this reason, oxidation methods have been investigated for the efficient decolorization and degradation of these refractory organic dyes [4]. Electrochemical oxidation (EO) is one of the most attractive methods featuring easy implementation, high efficiency and environmental compatibility [5][6][7][8].…”

Comparative use of anodic oxidation, electro-Fenton and photoelectro-Fenton with Pt or boron-doped diamond anode to decolorize and mineralize Malachite Green oxalate dye

“…AO involves the direct oxidation of organics at the surface of the anode (M) and, when a high current is applied, their much more rapid attack by physisorbed hydroxyl radical (M( OH)) produced from water oxidation as follows [1,[6][7][8][9][10][11]:…”