Reaction kinetics of hydrogen peroxide with copper and iron in seawater

Moffett, James W.; Zika, Rod G.

doi:10.1021/es00162a012

Cited by 384 publications

(255 citation statements)

References 23 publications

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“…There are different approach to explain this effect (1,2,(7)(8)(9) . Moffet and Zika (10) figure 1-inset). This mean that [Fe(OH)] + is the most reactive specie for Fenton reaction but its concentration is very lower to be main specie involves in Fenton reaction.…”

Section: Iron Speciation and Fenton Reactionmentioning

confidence: 99%

“…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). This species is stronger oxidant than triplet oxygen (52,53) .…”

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: Iron Speciation and Fenton Reactionmentioning

confidence: 99%

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

View full text Add to dashboard Cite

show abstract

“…Because hydrogen peroxide can act as either an oxidant or a reductant, the suite of reactions involving hydrogen peroxide in natural waters is quite extensive. Hydrogen peroxide influences the redox chemistry of natural waters in several potentially important ways; by altering the speciation of trace metals in natural waters (Moffett and Zika, 1987), by changing the fate of pollutants, and potentially influencing the biological activity of the microbial community (Obernosterer et al, 2001). To fully characterize and model the effects of hydrogen peroxide and organic peroxides in natural waters, additional information regarding the mechanisms of production and loss in natural systems is needed, in particular the factors influencing the photochemical production of peroxides, for example DOC concentration, humic acid or fulvic acid content.…”

Section: Introductionmentioning

confidence: 99%

Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

et al. 2005

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“…In addition, biological (Wilson et al 2000b) and trace metal mediated production in darkness (Moffett and Zika 1987), as well as wet and dry deposition (Miller and Kester 1994), can contribute to the H 2 O 2 concentration in natural waters.…”

Section: Introductionmentioning

confidence: 99%

Hydrogen peroxide distribution, production, and decay in boreal lakes

Häkkinen¹,

Anesio²,

Granéli³

2004

Can. J. Fish. Aquat. Sci.

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Abstract:The distribution, production, and decay of hydrogen peroxide (H 2 O 2 ) were studied in 10 boreal lakes of differing physical-chemical characteristics. Diurnal and vertical fluctuations in H 2 O 2 concentration were followed in the lakes by sampling at six depths three times per day. In addition, incubations of water filtered through 0.2-µm mesh were made under artificial irradiation to study the abiotic production and decay of H 2 O 2 . H 2 O 2 concentrations after 8 h of artificial irradiation were significantly correlated with neither absorption coefficients at 320 nm nor with dissolved organic carbon (DOC) concentrations. However, H 2 O 2 concentration increased rapidly with DOC concentration among lakes with DOC concentrations below 10 mg·L -1 . The H 2 O 2 concentration after exposure to ultraviolet radiation was positively related to the half-life of H 2 O 2 , which in turn was negatively correlated with iron and manganese concentrations (r 2 = 0.68 and 0.70, respectively). In situ H 2 O 2 concentrations at the surface of the water column ranged between 30 and 1041 nmol·L -1 and were largely determined by the decay rates of H 2 O 2 and the mixing depth of the water column.

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Reaction kinetics of hydrogen peroxide with copper and iron in seawater

Cited by 384 publications

References 23 publications

Fenton Reaction Driven by Iron Ligands

Fenton Reaction Driven by Iron Ligands

Photochemical production of hydrogen peroxide and methylhydroperoxide in coastal waters

Hydrogen peroxide distribution, production, and decay in boreal lakes

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