Experimental and Modelling Approach for the Comparison of Fenton and Electro-Fenton Processes. Preliminary Results

2006 ◽  
Vol 9 (1) ◽  
Author(s):  
Truong Giang Le ◽  
Alain Bermond
Keyword(s):  
Hydrogen Peroxide ◽  
Oxygen Reduction ◽  
Organic Compounds ◽  
Fenton Reaction ◽  
Experimental Approach ◽  
Fenton Process ◽  
Iron Salt ◽  
Preliminary Results ◽  
Modelling Approach

AbstractThe Electro-Fenton is one of the processes based on the Fenton reaction, which have been investigated to improve the efficiency of classical Fenton treatment. The Electro-Fenton has been shown to be efficient in the degradation of many organic compounds. However, generally there is no true estimation of its efficiency compared to that of the classical Fenton process. This study aimed to compare the two processes using an experimental approach and modelling. First of all, degradation of hydrogen peroxide (externally applied) was studied. It was shown that the Electro-Fenton process needs smaller quantities of iron (5 times less) than the Fenton to decompose the same quantity of hydrogen peroxide. The Electro-Fenton process may also produce hydrogen peroxide in situ (oxygen reduction). This leads to an important reduction in the consumption of chemicals (hydrogen peroxide, small quantities of iron salt). Finally, a study of the degradation of phenol, when hydrogen peroxide was electrogenerated has shown the greater efficiency of Electro-Fenton compared to the Fenton process.

Electrocatalytic Activity of Three Carbon Materials for the In-situ Production of Hydrogen Peroxide and Its Application to the Electro-Fenton Heterogeneous Process

2016 ◽  
Vol 14 (4) ◽  
pp. 843-850 ◽  
Author(s):  
Orlando García-Rodríguez ◽  
Jennifer A. Bañuelos ◽  
Arturo Rico-Zavala ◽  
Luis A. Godínez ◽  
Francisco J. Rodríguez-Valadez
Keyword(s):  
Hydrogen Peroxide ◽  
Electrocatalytic Activity ◽  
Lower Cost ◽  
Carbon Materials ◽  
Carbon Cloth ◽  
Fenton Process ◽  
Toc Removal ◽  
Iron Salts ◽  
Production Of Hydrogen

Abstract The in-situ generation of hydrogen peroxide in the electro-Fenton process is paramount. For this reason, in this research the electrocatalytic activity of three carbon materials was evaluated in the reaction of oxygen reduction via two electrons. Furthermore, in order to eliminate the use of iron salts in solution (homogeneous process), the iron was electrodeposited on the surface of the carbon material and was applied in a heterogeneous electro-Fenton process for the degradation of methyl orange dye. The largest amount of generated H2O2 was achieved with the Carbon Felt (CF) electrode (460 mg L−1) without iron after 60 minutes. The electrodes with electrodeposited iron were characterized by SEM and EDS, which showed that the surface of the Carbon Sponge (CS) electrode had the largest amount of iron (23.84 %). However, the CF electrode showed a greater and faster degradation of the dye (98 %) after 30 minutes of treatment. The CF material was the best and most-viable choice of material compared to the CS and Carbon Cloth (CC) for industrial application in electro-Fenton processes, due to its greater catalytic activity in the production of H2O2, uniform distribution of iron, more efficient TOC removal and lower cost per cm2 of material.

Oxygen Reduction Reaction on Graphene in an Electro-Fenton System: In Situ Generation of H2O2for the Oxidation of Organic Compounds

ChemSusChem ◽  
2016 ◽  
Vol 9 (10) ◽  
pp. 1194-1199 ◽  
Author(s):  
Chen-Yu Chen ◽  
Cheng Tang ◽  
Hao-Fan Wang ◽  
Cheng-Meng Chen ◽  
Xiaoyuan Zhang ◽  
...  
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Organic Compounds ◽  
Reduction Reaction ◽  
Oxidation Of Organic Compounds ◽  
In Situ Generation ◽  
Fenton System

Electrodeposition of PANI/MWCNT nanocomposite on stainless steel with enhanced electrocatalytic activity for oxygen reduction reaction and electro-Fenton process

2017 ◽  
Vol 41 (13) ◽  
pp. 5995-6003 ◽  
Author(s):  
Rasoul Babaei-Sati ◽  
Jalal Basiri Parsa
Keyword(s):  
Stainless Steel ◽  
Oxygen Reduction Reaction ◽  
Cathode Material ◽  
Oxygen Reduction ◽  
Electrocatalytic Activity ◽  
Cost Effective ◽  
Reduction Reaction ◽  
Fenton Process

A more efficient and cost-effective cathode material for in situ electrogeneration of H2O2 and electro-Fenton process is prepared.

A Novel Route for Waste Water Treatment: Photo-Assisted Fenton Degradation of Naphthol Green B

2008 ◽  
Vol 73 (5) ◽  
pp. 679-689 ◽  
Author(s):  
Anil Kumar ◽  
Mukesh Paliwal ◽  
Rameshwar Ameta ◽  
Suresh C. Ameta
Keyword(s):  
Hydrogen Peroxide ◽  
Atmospheric Pressure ◽  
Fenton Reaction ◽  
Reaction Rate ◽  
Waste Water Treatment ◽  
Photochemical Degradation ◽  
Fenton Process ◽  
Fenton Reagent ◽  
Reaction Conditions ◽  
Naphthol Green B

This study was conducted to assess the removal of the Naphthol Green B dye from aqueous medium using the photo-Fenton process. The Fenton reagent, a mixture of hydrogen peroxide and Fe3+ ions, was used to generate the hydroxyl radical (•OH) that degrades the dye. Experiments were conducted at laboratory temperature and atmospheric pressure to examine the effect of reaction conditions such as the concentration of Fe3+ ions, the dye and hydrogen peroxide, pH, and light intensity on the reaction rate. The progress of the photochemical degradation was monitored spectrophotometrically. The optimum photochemical degradation conditions were determined. Naphthol Green B was completely degraded into CO2 and H2O. A tentative mechanism for photochemical bleaching of the dye by the photo- Fenton reaction has been proposed.

scholarly journals Combined AOPs for Formaldehyde Degradation Using Heterogeneous Nanostructured Catalysts

Nanomaterials ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 148
Author(s):  
Renato Bonora ◽  
Carlo Boaretti ◽  
Laura Campea ◽  
Martina Roso ◽  
Alessandro Martucci ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Photocatalytic Activity ◽  
Fenton Reaction ◽  
Advanced Oxidation Processes ◽  
Heterogeneous Systems ◽  
Nanostructured Catalysts ◽  
Fenton Process ◽  
Oxidation Processes ◽  
Polymeric Nanofibers ◽  
Formaldehyde Degradation

In this paper we studied the combination of advanced oxidation processes (AOPs), i.e., TiO2-based photocatalysis and photo-Fenton process, on the degradation of aqueous solutions containing a low (90 ppm) concentration of formaldehyde. Heterogeneous nanostructured catalysts, supported on polymeric nanofibers, were used; for comparison, some homogeneous or partly heterogeneous systems were also analyzed. Furthermore, to make the process more sustainable (in terms of costs and safety) no hydrogen peroxide was added to the system. The results showed that the combination of AOPs gave a synergy since the presence of iron was beneficial in promoting the photocatalytic activity of TiO2 while TiO2 was beneficial in promoting the photo-Fenton reaction. Moreover, very good results were obtained using fully heterogeneous nanostructured catalysts (based on TiO2 and FeSO4), without the need to add H2O2.

Self-evolved hydrogen peroxide boosts photothermal-promoted tumor-specific nanocatalytic therapy

2019 ◽  
Vol 7 (22) ◽  
pp. 3599-3609 ◽  
Author(s):  
Shanshan Gao ◽  
Xiangyu Lu ◽  
Piao Zhu ◽  
Han Lin ◽  
Luodan Yu ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Fenton Reaction ◽  
Rational Design ◽  
Tumor Therapy ◽  
Two Dimensional ◽  
Highly Efficient

Highly efficient nanocatalytic tumor therapy has been achieved by in situ self-supplied H2O2-triggered and photothermally-promoted Fenton reaction by the rational design of two-dimensional composite nanoreactors.

scholarly journals Co-Catalytic Action of Faceted Non-Noble Metal Deposits on Titania Photocatalyst for Multielectron Oxygen Reduction

Catalysts ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 1145
Author(s):  
Peng Wang ◽  
Bunsho Ohtani
Keyword(s):  
Photocatalytic Activity ◽  
Oxygen Reduction ◽  
Organic Compounds ◽  
Reduction Reaction ◽  
Catalytic Action ◽  
Oxygen Reduction Reactions ◽  
Anatase Titania ◽  
Rutile Titania ◽  
Titania Photocatalyst

In order to clarify the reason of often reported low photocatalytic activity of rutile titania compared to that of anatase titania and the sluggish kinetics for oxygen reduction of rutile titania, in this study, faceted copper(I) oxide (Cu2O) particles (FCPs), i.e., cube, cuboctahedron and octahedron, were deposited onto rutile particles by an in-situ wet chemical method, and the co-catalytic action of FCPs was studied in the oxidative decomposition of acetic acid. The oxygen reduction reaction kinetics of bare and FCP-loaded titania samples in photodecomposition of organic compounds were investigated by light-intensity dependence measurement. FCPs serve as the specific sites (sink) which accumulate excited electrons to drive multielectron oxygen reduction reactions, as the counter reaction in photodecomposition of organic compounds by positive holes, which significantly improves the photocatalytic activity of rutile titania particles.

scholarly journals Simultaneous in situ generation of hydrogen peroxide and Fenton reaction over Pd–Fe catalysts

2010 ◽  
Vol 12 (44) ◽  
pp. 14673 ◽  
Author(s):  
Mohammad S. Yalfani ◽  
Sandra Contreras ◽  
Jordi Llorca ◽  
Montserrat Dominguez ◽  
Jesus E. Sueiras ◽  
...  
Keyword(s):  
Hydrogen Peroxide ◽  
Fenton Reaction ◽  
Fe Catalysts ◽  
In Situ Generation
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