Enhancing the electrochemical oxidation of acid-yellow 36 azo dye using boron-doped diamond electrodes by addition of ferrous ion

Villanueva-Rodríguez, Minerva; Hernández-Ramírez, Aracely; Peralta‐Hernández, Juan M.; Bandala, Erick R.; Quiroz-Alfaro, Marco A.

doi:10.1016/j.jhazmat.2008.12.137

Cited by 55 publications

(23 citation statements)

References 48 publications

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“…Several electrochemical advanced oxidation processes (EAOPs), including electro-oxidation (EO, also called electrochemical oxidation or anodic oxidation) and processes based on Fenton's reaction like electro-Fenton (EF), have been recently utilized to efficiently destroy azo dyes [4,[11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. EAOPs are easy to handle and very versatile, also presenting high energy efficiency, great effectiveness to oxidize organic pollutants and environmental compatibility.…”

Section: Introductionmentioning

confidence: 99%

Evidence of Fenton-like reaction with active chlorine during the electrocatalytic oxidation of Acid Yellow 36 azo dye with Ir-Sn-Sb oxide anode in the presence of iron ion

Aguilar

Brillas

Salazar

et al. 2017

Applied Catalysis B: Environmental

117

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The degradation of 2.5 L of Acid Yellow 36 solutions at pH 3.0 by electro-oxidation (EO) has been studied in a flow plant with a reactor containing an Ir-Sn-Sb oxide anode and a stainless steel cathode. The anode was prepared onto Ti by the Pechini method and characterized by SEM-EDX and XRD. It showed a certain ability to electrocatalyze both, the generation of adsorbed OH from water oxidation in sulfate medium and, more largely, the production of active chlorine in a mixed electrolyte containing Cl − ion. The EO treatment of the dye solution in the latter medium led to a rapid decolorization because active chorine destroyed the colored by-products formed, but color removal was much slower in pure NaClO 4 or Na 2 SO 4 due to the limited formation of OH. In contrast, greater mineralization was obtained in both pure electrolytes since the by-products formed in the presence of Cl − became largely persistent. The effect of liquid flow rate, current density and dye content on the EO performance in the mixed electrolyte was examined. The drop of absorbance and dye concentration obeyed a pseudo-first-order kinetics. Interestingly, the decolorization rate, dye concentration decay and TOC removal were enhanced upon catalysis with 1.0 mM Fe 2+. Such better performance can be accounted for by the formation of OH in the bulk from the electro-Fenton-like reaction between electrogenerated HClO and added Fe 2+. Even larger mineralization was achieved by the photoelectro-Fenton-like process upon irradiation of the solution with UVA light due to photolysis of some refractory intermediates. Maleic and acetic acids were detected as final short-chain linear carboxylic acids. The loss of Cl − and the formation of ClO 3 − , ClO 4 − , SO 4 2− , NO 3 − and NH 4 + were evaluated as well.

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Section: Introductionmentioning

confidence: 99%

Evidence of Fenton-like reaction with active chlorine during the electrocatalytic oxidation of Acid Yellow 36 azo dye with Ir-Sn-Sb oxide anode in the presence of iron ion

Aguilar

Brillas

Salazar

et al. 2017

Applied Catalysis B: Environmental

117

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“…In these environmentally friendly techniques, Å OH are generated directly on the anode surface (anodic oxidation) or indirectly through Fenton reaction in bulk of the solution (electro-Fenton). In anodic oxidation, they are formed at the anode surface by water oxidation using a high O 2 -overvoltage electrode such as PbO 2 [25], RuO 2 based mixed metal oxides [16] or boron-doped diamond (BDD) [26][27][28][29][30][31][32][33][34][35][36]:…”

Section: Introductionmentioning

confidence: 99%

Oxidation/mineralization of 2-Nitrophenol in aqueous medium by electrochemical advanced oxidation processes using Pt/carbon-felt and BDD/carbon-felt cells

Oturan¹,

Hamza

Ammar

et al. 2011

Journal of Electroanalytical Chemistry

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“…Typical examples of widely used anodes include Fe [27], steel [28,29], Al [30], Dimensionally Stable Anodes (DSA) composed of mixtures of Ti, Ir, Ru, Sn, Pb and/or Sb oxides [31][32][33], Pt [29,34] or Tisupported Pt [35], granular activated carbon [14], activated carbon fiber (ACF) [15], glassy carbon [16], graphite [17], polypyrrole [18], perovskite-like BaPb 0.9 Sb 0.1 O 3 [19] and BDD deposited mainly on Si [20], Ti [21] or Nb [7] substrates. These electrodes could be used either for direct (occurring at the surface of the anode) or for indirect oxidation processes such as the homogeneous reaction of organic pollutants with strong oxidants (like active chlorine [36], or hydroxyl radicals via Fenton's reaction [37]).…”

Section: Introductionmentioning

confidence: 99%

Electrochemical degradation of Reactive Red 120 using DSA and BDD anodes

et al. 2010

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Electrochemical oxidation of an azo dye (Reactive Red 120) was studied in acidic media (1 M HClO 4 ) using DSA type (Ti/IrO 2 -RuO 2 ) and boron doped diamond (BDD) anodes. Ti/IrO 2 -RuO 2 exhibited low oxidation power with high selectivity to organic intermediates and low TOC removal (10% at 25°C and 40% at 80°C). On the other hand BDD was found to be suitable for total mineralization of the organic loading to CO 2 . In both cases, the decoloration of the solution was almost 100% achieved very quickly with BDD (2 Ah L -1 ) but only after long treatment with Ti/IrO 2 -RuO 2 (25 Ah L -1 ). The instantaneous current efficiency (ICE) was up to 0.13 in the case of Ti/IrO 2 -RuO 2 and up to 0.45 in the case of BDD.

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Enhancing the electrochemical oxidation of acid-yellow 36 azo dye using boron-doped diamond electrodes by addition of ferrous ion

Cited by 55 publications

References 48 publications

Evidence of Fenton-like reaction with active chlorine during the electrocatalytic oxidation of Acid Yellow 36 azo dye with Ir-Sn-Sb oxide anode in the presence of iron ion

Evidence of Fenton-like reaction with active chlorine during the electrocatalytic oxidation of Acid Yellow 36 azo dye with Ir-Sn-Sb oxide anode in the presence of iron ion

Oxidation/mineralization of 2-Nitrophenol in aqueous medium by electrochemical advanced oxidation processes using Pt/carbon-felt and BDD/carbon-felt cells

Electrochemical degradation of Reactive Red 120 using DSA and BDD anodes

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