Reaction kinetics for the degradation of phenol and chlorinated phenols using Fenton's reagent

De, Arijit; Dutta, Binay K.; Bhattacharjee, Sekhar

doi:10.1002/ep.10104

Cited by 21 publications

(11 citation statements)

References 36 publications

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“…However, further increase in the substrate concentration from 500 to 1,000 mg/L provided a degradation efficiency of 94 and 72 %, respectively, after 90 min of irradiation. These results correspond closely to other similar reported work (De et al 2006). Decreasing of degradation efficiency at high concentration may be attributed to the consumption of Fenton reagent before oxidation process completed.…”

Section: Effect Of Irradiation Time and Initial Concentrationsupporting

confidence: 93%

Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

Alalm

Tawfik

2014

Appl Water Sci

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In this study, solar photo-Fenton reaction using compound parabolic collectors reactor was assessed for removal of phenol from aqueous solution. The effect of irradiation time, initial concentration, initial pH, and dosage of Fenton reagent were investigated. H 2 O 2 and aromatic intermediates (catechol, benzoquinone, and hydroquinone) were quantified during the reaction to study the pathways of the oxidation process. Complete degradation of phenol was achieved after 45 min of irradiation when the initial concentration was 100 mg/L. However, increasing the initial concentration up to 500 mg/L inhibited the degradation efficiency. The dosage of H 2 O 2 and Fe ?2 significantly affected the degradation efficiency of phenol. The observed optimum pH for the reaction was 3.1. Phenol degradation at different concentration was fitted to the pseudo-first order kinetic according to Langmuir-Hinshelwood model. Costs estimation for a large scale reactor based was performed. The total costs of the best economic condition with maximum degradation of phenol are 2.54 €/ m 3 .

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Section: Effect Of Irradiation Time and Initial Concentrationsupporting

confidence: 93%

Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

Alalm

Tawfik

2014

Appl Water Sci

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“…A similar study was reported by Anotai et al (2006). De et al (2006) studied degradation of phenol and chlorinated phenols. Quite a few studies were reported on the degradation of residual dyes and dyeing wastewater using the Fenton's reagent.…”

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confidence: 59%

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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“…Fenton systems in particular have been found to be very active for the oxidation of 2-chlorophenol (2-CP), and as a result these have been well-studied [2][3][4]. In the case of heterogeneous Fenton systems, goethite (a-FeOOH) has been shown to catalyze the oxidation of 2-chlorophenol in the presence of hydrogen peroxide [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Temperature Dependence of the Oxidation of 2-Chlorophenol by Hydrogen Peroxide in the Presence of Goethite

Gordon

Marsh

2009

Catal Lett

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The oxidation of 2-chlorophenol by hydrogen peroxide in the presence of goethite has been investigated over the 299-323 K temperature range. Kinetic studies suggest that two different reaction stages exist, and that under the experimental conditions used in this work, each may be modeled as a pseudo-first-order reaction. The first stage involves the dissolution of goethite, based on experiments conducted on the effect of prior stirring time. However, comparison of the apparent activation energy for the first stage with those found in the literature indicates the concomitant oxidation of 2-chlorophenol likely takes places from hydroxyl radicals produced from reaction at the goethite surface, rather than those from a Fenton-based mechanism. The apparent activation energy for the second stage is closer to that for a Fenton-based reaction, suggesting that the second stage mainly involves oxidation of 2-chlorophenol by hydroxyl radicals formed from hydrogen peroxide reacting with the dissolved iron species. Taken together, these results provide further insight towards a molecular-level understanding of the reactivity of chlorinated phenols in the presence of minerals during remediation processes.

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Reaction kinetics for the degradation of phenol and chlorinated phenols using Fenton's reagent

Abstract: Fenton's reaction is an advanced treatment technol-

Cited by 21 publications

References 36 publications

Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

Investigation of optimum conditions and costs estimation for degradation of phenol by solar photo-Fenton process

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

Temperature Dependence of the Oxidation of 2-Chlorophenol by Hydrogen Peroxide in the Presence of Goethite

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