scholarly journals Review: Clay-Modified Electrodes in Heterogeneous Electro-Fenton Process for Degradation of Organic Compounds: The Potential of Structural Fe(III) as Catalytic Sites

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7742
Author(s):  
Laura Cipriano Crapina ◽  
Liva Dzene ◽  
Jocelyne Brendlé ◽  
Florence Fourcade ◽  
Abdeltif Amrane ◽  
...  
Keyword(s):  
Electron Transfer ◽  
Organic Compounds ◽  
Advanced Oxidation Processes ◽  
Modified Electrodes ◽  
Fenton Process ◽  
Comprehensive Review ◽  
Oxidation Processes ◽  
Industrial Wastewaters ◽  
Catalytic Sites ◽  
Mineral Structure

Advanced oxidation processes are considered as a promising technology for the removal of persistent organic pollutants from industrial wastewaters. In particular, the heterogeneous electro-Fenton (HEF) process has several advantages such as allowing the working pH to be circumneutral or alkaline, recovering and reusing the catalyst and avoiding the release of iron in the environment as a secondary pollutant. Among different iron-containing catalysts, studies using clay-modified electrodes in HEF process are the focus in this review. Fe(III)/Fe(II) within the lattice of clay minerals can possibly serve as catalytic sites in HEF process. The description of the preparation and application of clay-modified electrodes in the degradation of model pollutants in HEF process is detailed in the review. The absence of mediators responsible for transferring electrons to structural Fe(III) and regenerating catalytic Fe(II) was considered as a milestone in the field. A comprehensive review of studies investigating the use of electron transfer mediators as well as the mechanism behind electron transfer from and to the clay mineral structure was assembled in order to uncover other milestones to be addressed in this study area.

scholarly journals Degradation of Abamectin Using the Photo-Fenton Process

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Thiago Augusto de Freitas Matos ◽  
Alexandra Lemos Nunes Dias ◽  
Amanda Di Piazza Reis ◽  
Milady Renata Apolinário da Silva ◽  
Márcia Matiko Kondo
Keyword(s):  
Water Treatment ◽  
Organic Compounds ◽  
Natural Water ◽  
Water Samples ◽  
Advanced Oxidation Processes ◽  
Active Principle ◽  
Fenton Process ◽  
Initial Amount ◽  
Oxidation Processes ◽  
Alternative Procedures

The cultivation of strawberries generally requires substantial use of pesticides, and abamectin is the active principle of one of those most commonly employed. Conventional water treatment does not remove pesticides efficiently, so there is a need to investigate alternative procedures. The use of advanced oxidation processes (AOPs) can achieve good results in removal of toxic organic compounds present in aqueous solutions. The photo-Fenton process, one example of an AOP, was employed to study the degradation of abamectin. Results showed that when natural water samples contaminated with abamectin were treated using the photo-Fenton process, 70% of the initial amount of the compound was removed within 60 minutes of UV irradiation, and 60% mineralization was observed after 180 minutes of reaction.

Effect of advanced oxidation processes on the toxicity of municipal landfill leachates

2004 ◽  
Vol 49 (4) ◽  
pp. 273-277 ◽  
Author(s):  
B. Slomczynska ◽  
J. Wasowski ◽  
T. Slomczynski
Keyword(s):  
Organic Compounds ◽  
Advanced Oxidation Processes ◽  
Vibrio Fischeri ◽  
Advanced Oxidation ◽  
Optimal Conditions ◽  
Toxicity Evaluation ◽  
Landfill Leachates ◽  
Oxidation Processes ◽  
Municipal Landfill ◽  
Pre Treatment

The aim of the present study was to assess the effect of advanced oxidation processes (AOPs) (oxidation ozone and peroxide/ozone) on the toxicity of leachates from municipal landfill for Warsaw, Poland, using a battery of tests. AOPs used to pre-treat leachates were carried out in laboratory conditions after their coagulation with the use of FeCl3. The effects of the pre-treatment of leachates using the method of coagulation with FeCl3 depended on the concentration of organic compounds and with optimal conditions of the process ranged from 40 to 70%. Further pre-treatment of the leachates after coagulation, involving the use of oxidation with O3 and H2O2/O3, did not cause significant decrease of leachate toxicity. The data of this study demonstrated the usefulness of the battery of tests using Daphnia magna, Artemia franciscana, Scenedesmus quadricauda and Vibrio fischeri for the toxicity evaluation of raw and pre-treated leachates.

Recent advances in advanced oxidation processes for removal of contaminants from water: A comprehensive review

2021 ◽  
Vol 146 ◽  
pp. 220-256 ◽  
Author(s):  
Adewale Giwa ◽  
Ahmed Yusuf ◽  
Hammed Abiodun Balogun ◽  
Nonni Soraya Sambudi ◽  
Muhammad Roil Bilad ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Comprehensive Review ◽  
Oxidation Processes ◽  
Recent Advances ◽  
Removal Of Contaminants

Application of Advanced Oxidation Processes to Different Industrial Wastewaters

2003 ◽  
Vol 38 (8) ◽  
pp. 1587-1596 ◽  
Author(s):  
Işıl Akmehmet Balcıoğlu ◽  
Idil Arslan Alaton ◽  
Merih Ötker ◽  
Rüştü Bahar ◽  
Nihal Bakar ◽  
...  
Keyword(s):  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes ◽  
Industrial Wastewaters

Identification of organic compounds in landfill leachate treated by advanced oxidation processes

2017 ◽  
Vol 40 (6) ◽  
pp. 730-741 ◽  
Author(s):  
Ana Paula Jambers Scandelai ◽  
Eliane Sloboda Rigobello ◽  
Beatriz Lopes Corso de Oliveira ◽  
Célia Regina Granhen Tavares
Keyword(s):  
Organic Compounds ◽  
Landfill Leachate ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Oxidation Processes

Degradation of propoxycarbazone-sodium with advanced oxidation processes

2011 ◽  
Vol 11 (1) ◽  
pp. 129-134 ◽  
Author(s):  
A. Dulov ◽  
N. Dulova ◽  
Y. Veressinina ◽  
M. Trapido
Keyword(s):  
Rate Constants ◽  
Advanced Oxidation Processes ◽  
Advanced Oxidation ◽  
Fenton Process ◽  
Oxidation Processes ◽  
First Order ◽  
Order Rate ◽  
Conversion Time ◽  
Pseudo First Order ◽  
Kinetics Of

The degradation of propoxycarbazone-sodium, an active component of commercial herbicide, in aqueous solution with ozone, UV photolysis and advanced oxidation processes: O3/UV, O3/UV/H2O2, H2O2/UV, and the Fenton process was studied. All these methods of degradation proved feasible. The kinetics of propoxycarbazone-sodium degradation in water followed the pseudo-first order equation for all studied processes except the Fenton treatment. The application of schemes with ozone demonstrated low pseudo-first order rate constants within the range of 10−4 s−1. Addition of UV radiation to the processes improved the removal of propoxycarbazone-sodium and increased the pseudo-first order rate constants to 10−3 s−1. The Fenton process was the most efficient and resulted in 5 and 60 s of half-life and 90% conversion time of propoxycarbazone-sodium, respectively, at 14 mM H2O2 concentration. UV treatment and the Fenton process may be recommended for practical application in decontamination of water or wastewater.

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