Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton’s Reaction Chemistry

Brillas, Enric; Sirés, Ignasi; Oturan, Mehmet A.

doi:10.1021/cr900136g

Cited by 2,841 publications

(2,035 citation statements)

References 332 publications

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“…The main ROS, responsible for the high oxidizing power of the Fenton reaction, is not clear. Some authors claim that the principal reactive species is •OH, while others propose a ferryl specie (Fe 4+ or [FeO] 2+ ) (1,2) . Recently, have been proposed that the kind of reaction species produced depends mainly of pH and the iron composition of the coordination sphere.…”

Section: •-mentioning

confidence: 99%

“…This includes the hydroxyl radical (•OH) participation(1). This compound is the most reactive ROS (reactive oxygen specie) known (5) , have a standard redox potential of 2,8 V (2) and consequently a low selectivity. The Fe 3+ reacts with H 2 O 2 producing perhydroxyl radical (HO 2 •).…”

Section: Ros Generated By Fenton Reactionmentioning

confidence: 99%

“…The Fe 3+ reacts with H 2 O 2 producing perhydroxyl radical (HO 2 •). This reaction is named "Fenton like" (2). The HO 2 •, presents lower oxidant capacity than others ROS, but participate in the Fe 3+ reduction to Fe 2+ (3) to keep the •OH production by (1).…”

Section: Ros Generated By Fenton Reactionmentioning

confidence: 99%

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Fenton Reaction Driven by Iron Ligands

Salgado

Melín

Contreras

et al. 2013

J. Chil. Chem. Soc.

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One of the most important sources of reactive oxygen species (ROS) in biological systems is the Fenton reaction. In this, the Fe 2+ or Fe 3+ reacts with H 2 O 2 to produce ROS as the hydroxyl radical (•OH), superoxide radical (O 2 •-) and singlet oxygen ( 1 O 2 ). The main ROS, responsible for the high oxidizing power of the Fenton reaction, is not clear. Some authors claim that the principal reactive species is •OH, while others propose a ferryl specie (Fe 4+ or [FeO] 2+ ) (1,2) . Recently, have been proposed that the kind of reaction species produced depends mainly of pH and the iron composition of the coordination sphere. This is highlighted for Fe 3+ , because in mono and (some) bis-complexes Fe 3+ is reduced to Fe 2+ and there are some positions occupied by water or hydroxide ligands, readily to be exchanged by H 2 O 2 . On the other hand, in tris-complexes there are not any positions occupied by water or hydroxide, avoiding the formation of peroxo-complexes, necessary for Fenton or Fenton like reaction.The 1,2-dihydroxybenzenes (DHBs) have been described as modulators of Fenton reaction. The DHBs driven Fenton reaction have been used for environmental applications as an advanced oxidation process. Furthermore, these systems participate in different biological process, as the wood biodegradation by fungi and oxidative stress in neurodegenerative diseases.In this review, the effect of 1,2-dihydroxybenzenes on the activated species production by the Fenton and Fenton like reaction will be discussed and its participation in different systems.

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Section: •-mentioning

confidence: 99%

Section: Ros Generated By Fenton Reactionmentioning

confidence: 99%

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Fenton Reaction Driven by Iron Ligands

Salgado

Melín

Contreras

et al. 2013

J. Chil. Chem. Soc.

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“…However, when the catalyst addition is further increased to 1.5 g/L, the degradation of MO does not improve but slightly decreases. This may be due to the agglomeration of nanoparticles and the scavenging of hydroxyl radicals or other radicals by Fe species through the undesirable reactions (2) and (3) [20-21]: ≡Fe 2+ + OH·→ ≡Fe 3+ + OH - (2) ≡Fe 2+ + ·OOH → ≡Fe 3+ + OOH - (3) The degradation of MO by Fe 3 O 4 -BT is dramatically improved with increasing reaction temperature, as seen from Fig. 8.…”

Section: Catalytic Behaviormentioning

confidence: 99%

Magnetically Recoverable Fe3O4-Modified Bentonite as a Heterogeneous Catalyst of H2O2 Activation for Efficient Degradation of Methyl Orange

Yuan¹

2017

Pol. J. Environ. Stud.

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“…Therefore, it has been gradually applied to the pretreatment or mineralization of bio-refractory or toxic organic wastewater [10]. The electrocatalytic oxidation was first introduced by Stolte et al to the oxidative degradation of BMIM based ILs [11].…”

Section: Introductionmentioning

confidence: 99%

AuPd/Fe3O4-based three-dimensional electrochemical system for efficiently catalytic degradation of 1-butyl-3-methylimidazolium hexafluorophosphate

Qin

Sun

Liu

et al. 2015

Electrochimica Acta

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Keywords: three-dimensional system AuPd/Fe 3 O 4 ionic liquids kinetic study degradation mechanism A B S T R A C T Ionic liquids (ILs) have been reported to be toxic and harmful to aquatic and terrestrial organisms, thus it is imperative to remove the residual ILs in various effluents. In this work, a three-dimensional (3D) electrocatalytic system with synthesized AuPd/Fe 3 O 4 nanoparticles (NPs) as particle electrodes (PEs) was established for the degradation of typical 1-butyl-3-methylimidazolium ([BMIM]) based ILs. The assynthesized AuPd/Fe 3 O 4 possessed preferable electrochemical properties for in situ supplement of H 2 O 2 and renewable Fe species. This 3D electrocatalytic system exhibited excellent performance with 100% removal rate of BMIM in 90 min under 120 mA, pH 3, and 1 g/L dosage of AuPd/Fe 3 O 4 NPs. Kinetics study revealed that the degradation rule of BMIM well followed the anodic Fenton treatment (AFT) model, in which the variation of the degradation rate was positively correlated with that of dissolved Fe 2+ , while significantly differed from the evolution of H 2 O 2 . Particularly, the appearance of the H 2 O 2 inflection point suggested the optimal effectiveness of AuPd/Fe 3 O 4 -based 3D electrocatalysis. During this electrocatalytic process, the active HO was produced over the AuPd/Fe 3 O 4 PEs, thereby initiated the highly efficient degradation of BMIM into 1-butyl-3-methyl-2,4,5-trioxoimidazolidine, 1-butyl-3-methylurea and N-butyl-formamide as main intermediates. The electrocatalytic stability of the AuPd/Fe 3 O 4 PEs over seven times further indicated the potential applicability for organic wastewater treatment.

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Electro-Fenton Process and Related Electrochemical Technologies Based on Fenton’s Reaction Chemistry

Cited by 2,841 publications

References 332 publications

Fenton Reaction Driven by Iron Ligands

Fenton Reaction Driven by Iron Ligands

Magnetically Recoverable Fe3O4-Modified Bentonite as a Heterogeneous Catalyst of H2O2 Activation for Efficient Degradation of Methyl Orange

AuPd/Fe3O4-based three-dimensional electrochemical system for efficiently catalytic degradation of 1-butyl-3-methylimidazolium hexafluorophosphate

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