Effect of humic acids on the Fenton degradation of phenol

Vione, Davide; Merlo, F.; Maurino, Valter; Minero, Claudio

doi:10.1007/s10311-004-0086-3

Cited by 72 publications

(42 citation statements)

References 12 publications

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“…5). Such an effect of H 2 O 2 concentration was reported by other researchers as well (Martinez et al 2003;Vione et al 2004). At a high concentration, H 2 O 2 acts as a scavenger of OH radicals with simultaneous generation of oxygen that does not help in the degradation process.…”

Section: Effect Of H 2 Omentioning

confidence: 51%

“…This type of two-step kinetics consisting of a fast organic destruction in the first step followed by a slower second step is not uncommon for the Fenton's reaction. It has been observed for instance in the degradation of phenol (Vione et al 2004) and attributed to the transition from an Fe(II)-driven degradation to an Fe(III)-controlled one. The first step of Fenton's degradation is driven by Eq.…”

Section: Effect Of Initial Concentration Of Meamentioning

confidence: 94%

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Degradation of Monoethanolamine in Aqueous Solution by Fenton’s Reagent with Biological Post-treatment

Harimurti

Dutta²,

Ariff

et al. 2009

Water Air Soil Pollut

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Alkanolamines in the wastewater from gas treating plants are not readily biodegradable. In this work, we have investigated the effectiveness of the Fenton's reagent (H 2 O 2 -Fe 2+ ) to treat monoethanolamine (MEA) as a model compound in simulated wastewater. Degradation studies were carried out in a jacketed glass reactor. The effects of concentrations of ferrous sulfate, hydrogen peroxide, and the pH of a solution on the rate of reaction were determined. A pH of 3 was found to be the optimum. The degradation reaction proceeds very fast at the beginning but slows down significantly at a longer time. A larger fractional degradation of the organics in solution was observed if the initial chemical oxygen demand (COD) of the feed solution was high. Gradual addition of H 2 O 2 to the reaction mixture increased the COD removal by about 60% compared to one-time addition of the reagent at the beginning of the process. A rate equation for mineralization of the amine was developed on the basis of a simplified mechanistic model, and the lumped value of the rate constant for COD removal was determined. A partially degraded MEA solution as well as "pure" MEA was subjected to biological oxidation by activated sludge. The former substrate degraded much faster. The degradation rate and biomass generation data could be fitted by the Monod kinetic equations.

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Section: Effect Of H 2 Omentioning

confidence: 51%

Section: Effect Of Initial Concentration Of Meamentioning

confidence: 94%

Degradation of Monoethanolamine in Aqueous Solution by Fenton’s Reagent with Biological Post-treatment

Harimurti

Dutta²,

Ariff

et al. 2009

Water Air Soil Pollut

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“…In some cases the reduction of Fe(III) could be enhanced by quinones, aromatic additives and even humic acids. These compounds, despite their action as OH • scavengers, would be able to enhance degradation by accelerating the slow step of the process [20][21][22]. Also the transformation intermediates of a given substrate, or the substrate itself, could play a role in the process of Fe(III) reduction.…”

Section: Treatment Studies With Fenton's Oxidationmentioning

confidence: 99%

Degradation of diethanolamine by Fenton's reagent combined with biological post-treatment

Dutta¹,

Harimurti²,

Ariff³

et al. 2010

Desalination and Water Treatment

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Abstract:Effectiveness of the Fenton's reagent for partial degradation of diethanolamine (DEA) prior to biological treatment is investigated. The effects of the major process parameters on the time evolution of COD, an indicator of the extent of degradation, were measured. The DEA concentration ranged from 800 to 16,000 ppm, in consideration of the COD of real effluents of natural gas processing plants. The initial reaction rate was a strong function of the feed amine concentration. About 70-80% of the ultimate COD removal could be achieved within three minutes. The pH of the medium was varied over 1-4; the best results were obtained at pH 3.The effectiveness of a hybrid scheme of advanced oxidation followed by biodegradation was explored. Activated sludge from a local wastewater treatment pond was used. Fast COD removal of the partially degraded DEA was achieved within a day. Biodegradation of pure DEA was much slower, apparently because of the acclimatization time of the microbes.

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“…By virtue of OH radical production, Fenton and photo-Fenton reactions are well known to oxidize many organic compounds, including pesticides, phenols, polynuclear aromatic hydrocarbons, and polychlorinated biphenyls [Fukushima et al, 2000;Vione et al, 2004;Pignatello et al, 2006;Kochany and Lipczynska-Kochany, 2007]. As such, Fenton reactions are used to treat contaminated soils and water [Pignatello et al, 2006].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the Fe(II) oxidation step (Reaction 1) can be accelerated in the presence of carboxylate ligands, whose complexes with Fe(II) react faster than Fe(II)-aqueous complexes [Sedlak and Hoigné, 1993;Voelker and Sulzberger, 1996;Fukushima and Tatsumi, 2001]. Accordingly, humic substances, which contain a high density of quinoid units and carboxylate groups, have been shown in many instances to hasten the destruction of organic pollutants via both dark and photoFenton reactions in aqueous systems by catalyzing Fe redox reactions [Voelker and Sulzberger, 1996;Fukushima et al, 2000;Vione et al, 2004;Kochany and LipczynskaKochany, 2007]. Non-CO 2 degradation byproducts of the organic pollutants may become incorporated into the humic substances, or the humic substances themselves may be partly oxidized by the OH radicals generated in Reaction 1 [Fukushima et al, 2000].…”

Section: Introductionmentioning

confidence: 99%

Atmospheric HULIS enhance pollutant degradation by promoting the dark Fenton reaction

Moonshine¹,

Rudich²,

Katsman³

et al. 2008

Geophysical Research Letters

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[1] Humic-like substances (HULIS) in the atmosphere are ubiquitous macromolecular substances that comprise a major fraction of the organic component of atmospheric aerosols. In this study we report that HULIS extracted from collected wood burning and urban pollution atmospheric particles enhance aqueous phase oxidation of model organic contaminants (pyrene and phenol), by promoting the dark Fenton reaction under atmospherically relevant conditions. The paucity of radical sources at night makes this reaction, which is not accounted for in cloud chemistry models, potentially quite important for understanding and quantifying in-cloud degradation of organic pollutants, and for understanding Fe oxidation state speciation in atmospheric waters. Citation: Moonshine, M., Y. Rudich, S. Katsman, and E. R. Graber (2008), Atmospheric HULIS enhance pollutant degradation by promoting the dark Fenton reaction, Geophys.

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Effect of humic acids on the Fenton degradation of phenol

Cited by 72 publications

References 12 publications

Degradation of Monoethanolamine in Aqueous Solution by Fenton’s Reagent with Biological Post-treatment

Degradation of Monoethanolamine in Aqueous Solution by Fenton’s Reagent with Biological Post-treatment

Degradation of diethanolamine by Fenton's reagent combined with biological post-treatment

Atmospheric HULIS enhance pollutant degradation by promoting the dark Fenton reaction

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