The Galvano-Fenton process: Experimental insights and numerical mechanistic investigation applied to the degradation of acid orange 7

Gasmi, Intissar; Kerboua, Kaouther; Haddour, Naoufel; Hamdaoui, Oualid; Alghyamah, Abdulaziz; Buret, François

doi:10.1016/j.electacta.2021.137897

Cited by 6 publications

(6 citation statements)

References 39 publications

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“…Graedel et al used a rate constant of 7.2 × 10 5 M −1 s −1 ; this rate constant was reported in the Russian literature but for the reaction expressed as the above electron-transfer process. Others also represented the reaction with this stoichiometry, [113][114][115] but they used the rate constant of…”

Section: Kinetics Of Reduction Of Homentioning

confidence: 99%

“…Two publications with this reaction use mass-action kinetics for the forward process with a rate constant of 1 × 10 7 M −1 s −1 as derived from the work of Rush and Bielski. 113,114 Another publication uses a rate constant of 7.2 × 10 8 M −1 s −1 , but the source of this value is unclear. 112 The reverse process is formally a 4th-order reaction and obviously not an elementary step.…”

Section: Kinetics Of Reduction Of Omentioning

confidence: 99%

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The principle of detailed balancing, the iron-catalyzed disproportionation of hydrogen peroxide, and the Fenton reaction

Stanbury

2022

Dalton Trans.

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Section: Kinetics Of Reduction Of Homentioning

confidence: 99%

Section: Kinetics Of Reduction Of Omentioning

confidence: 99%

The principle of detailed balancing, the iron-catalyzed disproportionation of hydrogen peroxide, and the Fenton reaction

Stanbury

2022

Dalton Trans.

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“…We have recently patented an advanced Fenton process (called Galvano–Fenton (GF)), which assist the Fenton reaction by a galvanic corrosion of iron plates [ 20 ]. This new process ensures effective degradation of organic pollutants by continuous in situ production of catalyst without any energy consumption [ 21 , 22 ]. Herein, we describe a new approach to convert the Galvano–Fenton process to a source of electrical power, which increases the efficiency of the Fenton reaction and reduces running costs.…”

Section: Introductionmentioning

confidence: 99%

A Novel Energy-from-Waste Approach for Electrical Energy Production by Galvano–Fenton Process

et al. 2021

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A novel approach allowing the production of electrical energy by an advanced oxidation process is proposed to eliminate organic micropollutants (MPs) in wastewaters. This approach is based on associating the Galvano–Fenton process to the generation of electrical power. In the previous studies describing the Galvano–Fenton (GF) process, iron was directly coupled to a metal of more positive potential to ensure degradation of organic pollutants without any possibility of producing electrical energy. In this new approach, the Galvano–Fenton process is constructed as an electrochemical cell with an external circuit allowing recovering electrons exchanged during the process. In this study, Malachite Green (MG) dye was used as a model of organic pollutant. Simultaneous MG degradation and electrical energy production with the GF method were investigated in batch process. The investigation of various design parameters emphasis that utilization of copper as a low-cost cathode material in the galvanic couple, provides the best treatment and electrical production performances. Moreover, these performances are improved by increasing the surface area of the cathode. The present work reveals that the GF process has a potential to provide an electrical power density of about 200 W m−2. These interesting performances indicate that this novel Energy-from-Waste strategy of the GF process could serve as an ecological solution for wastewater treatment.

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“…More recently, a novel process based on the combination of a galvanic cell and Fenton reaction, namely the Galvano-Fenton process [25], has been experimentally and numerically investigated for its performance in terms of the catalyst formation and regeneration [26] and the degradation of acid orange 7 [27]. The basic mechanism of the Galvano-Fenton process is illustrated in Figure 1d.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Galvanic Generation of Fe2+ Catalyst and Spontaneous Energy Release in the Galvano-Fenton Technique: A Numerical Investigation of Phenol’s Oxidation and Energy Production and Saving

Kerboua¹,

Hamdaoui

Haddour

et al. 2021

Catalysts

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The present paper investigates the potential of the Galvano-Fenton process as an advanced technique in terms of the simultaneous oxidation of a model pollutant, phenol, and the energy release and saving as compared to conventional electrochemical techniques, namely, Fenton, Fenton-like, and Electro-Fenton. A numerical model describing the electrochemical, electrolytic, and phenol’s mineralization reactions is presented. Simulations are conducted to predict the kinetics of ferrous and ferric ions, radicals’ formation, and phenol degradation along with released power. Parametric analysis and comparisons are also performed between the basic configuration of the Galvano-Fenton process and its upgraded version integrating a pre-immersion stage of the electrodes in the electrolyte equivalent to 25% of the total experiment’s duration. The ratio of the initial concentration of H2O2 to the concentration of the released/added Fe2+ catalyst is varied from 10 to 30. The effect of phenol concentration is inspected over the range of 0.188 to 10 mg/L as well. Compared to conventional Fenton-based techniques, the Galvano-Fenton process demonstrated a higher performance by reaching 1.34% of degradation efficiency per released J. This is associated with the generation of hydroxyl radicals of 0.047 nM/released J with initial concentrations of hydrogen peroxide and phenol of 0.187 mM and 2 µM, respectively. Moreover, the integration of the pre-immersion stage allowed the overcoming the barrier of the null degradation rate at the initial instant.

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The Galvano-Fenton process: Experimental insights and numerical mechanistic investigation applied to the degradation of acid orange 7

Cited by 6 publications

References 39 publications

The principle of detailed balancing, the iron-catalyzed disproportionation of hydrogen peroxide, and the Fenton reaction

The principle of detailed balancing, the iron-catalyzed disproportionation of hydrogen peroxide, and the Fenton reaction

A Novel Energy-from-Waste Approach for Electrical Energy Production by Galvano–Fenton Process

Simultaneous Galvanic Generation of Fe2+ Catalyst and Spontaneous Energy Release in the Galvano-Fenton Technique: A Numerical Investigation of Phenol’s Oxidation and Energy Production and Saving

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