The reactor design and comparison of Fenton, electro-Fenton and photoelectro-Fenton processes for mineralization of benzene sulfonic acid (BSA)

Ting, Wang-Ping; Lu, Ming‐Chun; Huang, Yen‐Chieh

doi:10.1016/j.jhazmat.2007.12.031

Cited by 116 publications

(39 citation statements)

References 30 publications

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“…Unfortunately, very little quantitative information on the complex interplay that is likely to occur between H 2 O 2 , Fe (II) and Fe(III) species, HO 2 and OH in the E-Fenton system is available with this lack of detailed understanding seriously compromising our ability to optimize the performance of the EFenton system. As such, we focus in this work on obtaining a better understanding and, to the extent possible, quantification of the interactions between soluble and surface Fe(II) and Fe(III) species and reactive oxygen species (H 2 O 2 , HO 2 and OH) occurring in the E-Fenton process.…”

Section: Cathodementioning

confidence: 99%

“…Under acidic conditions, this homogeneous Fenton reaction generates hydroxyl radicals ( OH) that can non-selectively oxidize most organics to non-toxic products [1]. Due to the relative ease of handing the reagents involved in this process and the effective performance that can be achieved at low cost, homogeneous Fenton reactions have been widely applied in water and wastewater treatment [2,3]. However, the classical Fenton process produces large amounts of ferric oxyhydroxide sludge with the formation of this solid byproduct inhibiting the catalytic role of iron in generating OH [4].…”

Section: Introductionmentioning

confidence: 99%

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Kinetic Modeling of the Electro-Fenton Process: Quantification of Reactive Oxygen Species Generation

Qiu

et al. 2015

Electrochimica Acta

119

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A B S T R A C TIn this study, Electro-Fenton (E-Fenton) reactions at pH 3.0 were initiated by cathodic generation of H 2 O 2 , with subsequent production of OH following the addition of Fe(II) or Fe(III) ions into the system. The variation in concentrations of H 2 O 2 , Fe(II), total Fe and OH following addition of Fe ions into the E-Fenton system was investigated over a range of conditions. A kinetic model incorporating the key processes operating in the E-Fenton system was developed with particular attention given to (i) cathodic generation of H 2 O 2 and anodic formation of OH, (ii) production of OH via homogeneous Fenton reactions, and (ii) surface reactions including electro-sorption of Fe ions and cathodic reduction of Fe(III) to Fe(II) species resulting in the enhancement of production of OH via surface-located Fenton reactions. 2015 Z. Published by Elsevier Ltd. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/).

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Section: Cathodementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling of the Electro-Fenton Process: Quantification of Reactive Oxygen Species Generation

Qiu

et al. 2015

Electrochimica Acta

119

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“…The enhancement of the degradation rate of this process respect to the EF (when the solution is irradiated) is well recognized 26,27 . Among the dyes commonly used in Chile, we can find the Acid Violet 7 (AV7) and Reactive Black 5 (RB5) (Fig.…”

Section: Introductionmentioning

confidence: 96%

Degradation of Acid Violet 7 and Reactive Black 5 in Water by Electro-Fenton and Photo Electro-Fenton By

Salazar

Ureta-Zañartu

2012

J. Chil. Chem. Soc.

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The mineralization of solutions containing azo dyes Acid Violet 7 (AV7) and Reactive Black 5 (RB5) in aqueous solutions using electro-Fenton (EF) and Photo electro-Fenton (PEF) methods were determined. The electrochemical system includes a glassy carbon mesh electrode (cathode) with a concentric outer steel mesh as anode. The optimized parameters were: 0.01 mM of Fe 2+ ions, and 250 mA of applied current at pH 3. All experiments were made at 35ºC. The degradation was evaluated by color removal and total organic carbon (TOC) decay for solutions of 250 mg L -1 of both cases. The results indicate that the system achieves a degradation efficiency for both dyes proposed, being observed a quickly decolorization of the solutions and the complete transformation of organic compounds to carbon dioxide. The efficiency process and decoloration kinetic constant were evaluated. Generated carboxylic acids such oxalic, oxamic, citric and maleic were found by ion exclusion chromatography. A comparison of the electrochemical system with respect to Fenton`s and Photo-Fenton reaction was also performed.

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“…ions are produced by an electrolytic technique using iron electrodes, it is called an electro-Fenton (EF) process. The EF process has attracted much attention due to its characteristic low cost, facile operation, and high efficiency [10]. The Fenton process has been proven successful in the degradation of various types of organic compounds without producing any toxic substances in aquatic environments, and the whole process is very efficient and cost-effective compared to conventional chemical methods [11].…”

Section: Introductionmentioning

confidence: 99%

A comparative study on the removal of phenol from aqueous solutions by electro–Fenton and electro–persulfate processes using iron electrodes

et al. 2015

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This study examined the removal of phenol from aqueous solutions through electro-Fenton and electro-persulfate processes using iron electrodes. The effect of operational parameters such as initial pH, current density, initial concentration of phenol, hydrogen peroxide dose, and persulfate (PS) concentration on the removal of phenol were investigated. The results showed that the efficiency of phenol removal was directly related to the initial concentrations of hydrogen peroxide and PS, and was inversely correlated with a highly alkaline pH and elevated concentration of phenol. The efficiency of phenol removal was significantly increased by increasing PS and H 2 O 2 concentrations from 0.1 to 0.4 mM, but there was little influence on removal efficiency with greater quantities of PS and H 2 O 2 . Ultimately, phenol was almost completely removed after 45 min in both processes.

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The reactor design and comparison of Fenton, electro-Fenton and photoelectro-Fenton processes for mineralization of benzene sulfonic acid (BSA)

Cited by 116 publications

References 30 publications

Kinetic Modeling of the Electro-Fenton Process: Quantification of Reactive Oxygen Species Generation

Kinetic Modeling of the Electro-Fenton Process: Quantification of Reactive Oxygen Species Generation

Degradation of Acid Violet 7 and Reactive Black 5 in Water by Electro-Fenton and Photo Electro-Fenton By

A comparative study on the removal of phenol from aqueous solutions by electro–Fenton and electro–persulfate processes using iron electrodes

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