pH-Dependent reactivity of oxidants formed by iron and copper-catalyzed decomposition of hydrogen peroxide

Lee, Hongshin; Lee, Hye-Jin; Sedlak, David L.; Lee, Chang Ha

doi:10.1016/j.chemosphere.2013.01.073

Cited by 182 publications

(99 citation statements)

References 28 publications

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“…However, in some of these publications have been proposed the formation of different oxidant species in dependence of reaction conditions (pH, reagents concentration, redox potential, etc.) (45)(46)(47)(48)(49) . Lee et al (48) and Bataineh et al (49) propose the pH as the main factor but these results are not concluding.…”

Section: Fe(iv) and Singlet Oxygen In Fenton Reactionmentioning

confidence: 99%

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Fenton Reaction Driven by Iron Ligands

Salgado

Melín

Contreras

et al. 2013

J. Chil. Chem. Soc.

107

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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: Fe(iv) and Singlet Oxygen In Fenton Reactionmentioning

confidence: 99%

“…(45)(46)(47)(48)(49) . Lee et al (48) and Bataineh et al (49) propose the pH as the main factor but these results are not concluding. Recently, the singlet oxygen ( 1 O 2 ) have been postulated between the oxidant compounds generated by Fenton reaction (50,51) (9)(10)(11).…”

Section: Fe(iv) and Singlet Oxygen In Fenton Reactionmentioning

confidence: 99%

Fenton Reaction Driven by Iron Ligands

Salgado

Melín

Contreras

et al. 2013

J. Chil. Chem. Soc.

107

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“…Earlier studies suggested that Cu(III) species are the major reactive oxidants produced by the Cu(II)/H2O2 system under neutral and alkaline pH conditions [6,7,19], and that  OH may be dominantly produced under lower pH conditions [6,7]. However, more recently, Lee et al suggested that Cu(III) species are dominantly produced regardless of pH in the Cu(II)/H2O2 system, and that they exhibit  OH-like reactivity [8].…”

Section: Nature Of Reactive Oxidantsmentioning

confidence: 99%

“…However, the rate of H2O2 decomposition continued to increase with increasing pH from 7 to 12 ( Figure 3b). In addition, RB5 (believed to be more vulnerable to oxidation [6,7]) was employed as a reference target compound to investigate the pH effect. Contrary to phenol, RB5 was degraded faster under alkaline pH conditions (Figure 3c), exhibiting a similar trend to the H2O2 decomposition ( Figure 3b).…”

Section: Effects Of Cu(ii) Hco3 − H2o2 Doses and Solution Phmentioning

confidence: 99%

Enhanced Oxidation of Phenol by Copper-catalyzed Fenton-like Reaction in the Presence of Bicarbonate

Kim¹,

Lee²,

Park³

et al. 2018

Journal of Advanced Oxidation Technologies

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In this study, the copper-catalyzed Fenton-like reaction in the presence of bicarbonate (i.e., the Cu(II)/HCO3 − /H2O2 system) was examined for the phenol degradation. The rate of phenol degradation by the copper-catalyzed Fenton-like reaction ([Cu(II)]0 = 0.1 mM, [H2O2]0 = 10 mM, pH = 10) was accelerated by 17-fold in the presence of 50 mM HCO3 − . The rate of phenol degradation by the Cu(II)/HCO3 − /H2O2 system increased with increasing doses of Cu(II) and HCO3 − , but showed an optimal value for the H2O2 dose and pH at 5 mM and 10, respectively. The Cu(II)/HCO3 − /H2O2 system was selective in degrading phenolic compounds; benzoic acid was resistant to degradation. Cu(III) species (likely complexed forms with carbonate) are believed to be the reactive oxidants responsible for the phenol degradation by the Cu(II)/HCO3 − /H2O2 system. Meanwhile, aerating CO2 gas successfully accelerated the phenol degradation by the copper-catalyzed Fenton-like reaction, implying that CO2 aeration can be a practical option to supply bicarbonate when implementing the Cu(II)/HCO3 − /H2O2 system.

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“…• OH or Fe[IV]), by the reaction with Fe(II) (i.e., the Fenton reaction; reaction 3) in which [24][25][26][27].…”

Section: Chemistry Of Iron-induced Oxygen Activationmentioning

confidence: 99%

Oxidation of organic contaminants in water by iron-induced oxygen activation: A short review

Lee

2015

Environmental Engineering Research

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Reduced forms of iron, such as zero-valent ion (ZVI) and ferrous ion (Fe[II]), can activate dissolved oxygen in water into reactive oxidants capable of oxidative water treatment. The corrosion of ZVI (or the oxidation of (Fe [II]) forms a hydrogen peroxide (H2O2) intermediate and the subsequent Fenton reaction generates reactive oxidants such as hydroxyl radical (• OH) and ferryl ion (Fe[IV]). However, the production of reactive oxidants is limited by multiple factors that restrict the electron transfer from iron to oxygen or that lead the reaction of H2O2 to undesired pathways. Several efforts have been made to enhance the production of reactive oxidants by iron-induced oxygen activation, such as the use of iron-chelating agents, electron-shuttles, and surface modification on ZVI. This article reviews the chemistry of oxygen activation by ZVI and Fe(II) and its application in oxidative degradation of organic contaminants. Also discussed are the issues which require further investigation to better understand the chemistry and develop practical environmental technologies.

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pH-Dependent reactivity of oxidants formed by iron and copper-catalyzed decomposition of hydrogen peroxide

Cited by 182 publications

References 28 publications

Fenton Reaction Driven by Iron Ligands

Fenton Reaction Driven by Iron Ligands

Enhanced Oxidation of Phenol by Copper-catalyzed Fenton-like Reaction in the Presence of Bicarbonate

Oxidation of organic contaminants in water by iron-induced oxygen activation: A short review

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