Electrochemical degradation of Orange G in K&lt;sub&gt;2&lt;/sub&gt;SO&lt;sub&gt;4&lt;/sub&gt; and KCl medium

Hamous, Hanene; Khenifi, Aicha; Bouberka, Zohra

doi:10.4491/eer.2019.174

Cited by 16 publications

(7 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In contrast, in the study of Silva et al, which showed the first-order removal of TOC, EE/M exhibited far greater variations with time (31–37%) than EE/O (6–11%) . However, by high current operations for utilizing the oxidant generation reaction, pollutant removal generally follows first-order kinetics in most EOPs, where the use of EE/O is practically appropriate. − More details about the dependences of EE/O and EE/M on the operating parameters (including initial organic load and j ) are provided in the subsequent sections.…”

Section: Performance Evaluation Of Eopsmentioning

confidence: 99%

Electrochemical Oxidation Processes for the Treatment of Organic Pollutants in Water: Performance Evaluation Using Different Figures of Merit

Lee

Seo

et al. 2022

ACS EST Eng.

View full text Add to dashboard Cite

Electrochemical oxidation processes (EOPs) have gained attention as promising technologies for the removal of refractory organic pollutants in water and wastewater. Although many reviews have been reported on EOPs, to date, no review has been mainly focused on the energy efficiencies of EOPs. Accordingly, herein, EOPs for the treatment of organic pollutants in water and wastewater are reviewed, and the performances of different EOPs in terms of energy efficiencies are evaluated using various figures of merit. The basic principles of EOPs are briefly introduced, and indicators for the performance evaluation of EOPs are analyzed based on the fundamentals and statistical databases of EOPs obtained from the literature. Electrical energy per order (EE/O) and electrical energy per mass (EE/M) have been widely used to measure the energy efficiencies of EOPs. However, statistical analysis indicates that EE/O is a more suitable index in this regard than EE/M because it better represents the kinetics of pollutant degradation by EOPs, thereby mitigating the influence of the initial organic load on the performance evaluation of EOPs. EOPs modified using Fenton's reagent or external supplies of energy (or chemicals) exhibit higher energy efficiencies than those of anodic oxidation processes due to the existence of additional reactions or synergistic mechanisms for the generation of reactive oxidants. In addition to the evaluation of the energy efficiencies of different types of EOPs, the effects of electrode materials and electrolysis conditions, such as current density, pH, anions, and additive concentrations, on the energy efficiencies of EOPs are discussed. We believe that our review will provide useful information and insights for choosing the optimal types and conditions of EOPs for pollutant removal.

show abstract

Section: Performance Evaluation Of Eopsmentioning

confidence: 99%

Electrochemical Oxidation Processes for the Treatment of Organic Pollutants in Water: Performance Evaluation Using Different Figures of Merit

Lee

Seo

et al. 2022

ACS EST Eng.

View full text Add to dashboard Cite

show abstract

“…Its high chemical resistance to corrosion as well as its stability in very aggressive environments have favored its use in the electrochemical degradation of pollutants [28]. Hamous et al [29] reported the anodic oxidation of Orange G (75 mg.L −1 ) azo dye using platinum electrode. After 240 minutes of electrolysis, maximum color removal efficiency of 68.35% in K2SO4 (0.1 M) and 100% in KCl (0.1 M) were obtained at 50 mA.cm −2 current density.…”

Section: Platinummentioning

confidence: 99%

Electrode material in electrochemical decolorization of dyestuffs wastewater: A review

et al. 2021

View full text Add to dashboard Cite

Tеxtile wastewater contains a variety of contaminants that are known to be hazardous. Synthetic dyes are one of the hazardous pollutants in the textile industry that are resistant to the photo/bio dеgradation. They cannot be dеstroyed under conventional wastewater treatment. This document presents a review on the electrochemical treatment of wastеwater containing synthetic organic dyes by anodic oxidation for environmental protection. The mechanisms of еlectrochemical oxidation in anodic oxidation processes are well explained. A largе number of electrodes have been tested by this method. Therefore, this papеr aims to summarize and discuss the most important and rеcent results available in the literature on anode application for the rеmoval of synthetic dyestuffs. Finally, the prospects of the process for futurе research are suggested.

show abstract

“…Their data showed that carbon fiber had higher activity than graphite and the removal efficiency is proportional to the applied current . The selection of the proper electrolyte solution is also a significant factor in the electrochemical reactions . The wastewater has various ions, such as Cl – , CO 3 2– , and HCO 3 – , that can rapidly interact with the produced OH • , inhibiting pollutant destruction .…”

Section: Introductionmentioning

confidence: 99%

Development of a New Process for PhenolIn SituOxidation Using a Bifunctional Cathode Reactor

Yousif

Abdullah

2023

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Removal of organic and hazardous pollutants from wastewater by electro-Fenton technology is effective and attractive. However, the low productivity of hydrogen peroxide (H2O2) and its narrow pH working range reduce the possibility of its use in industrial processes. An advanced oxidation process is proposed for phenol removal from wastewater in a developed double-layer-cathode trickle-bed electrochemical reactor (TBER). In this technology, a powerful and environmentally benign oxidant, H2O2, is electroproduced by oxygen electrochemical reduction and then employed to oxidize phenol in wastewater. The cathode in the TBER consists of a double layer composed of a carbon black and poly(tetrafluoroethylene) mixture pasted on a stainless steel mesh to form a high-porosity electrode (C-PTFE-SSM). The highest H2O2 concentration of 46.56 mM was found after 50 min of electrolysis in a potassium hydroxide (KOH) electrolyte solution at a constant voltage. The effects of operating parameters such as the applied voltage, electrolyte and gas flow rates, temperatures, and phenol initial concentration on phenol oxidation were systematically optimized. Phenol was successfully oxidized in the developed reactor with a conversion efficiency of 98.65% under the best operating conditions. A kinetic study was also investigated for the proposed oxidation system at different temperatures. The process was designed to be cost-effective because the catalyst used is carbon black and to on-site produce an ecofriendly oxidant H2O2 and simultaneously oxidize phenol. The cathode was also designed to provide an efficient O2 mass transfer and to avoid any expected byproducts in addition to avoiding the use of ferric ions, which are considered to be a dangerous pollutant for water. It was also designed to be scalable and multiuse, which will be our next development reports including the treatment of phenols and organic compounds, the removal of dyes and antibiotics, the oxidation of ethanol and methanol, and the production of ammonia and perchlorate.

show abstract

Electrochemical degradation of Orange G in K<sub>2</sub>SO<sub>4</sub> and KCl medium

Cited by 16 publications

References 31 publications

Electrochemical Oxidation Processes for the Treatment of Organic Pollutants in Water: Performance Evaluation Using Different Figures of Merit

Electrochemical Oxidation Processes for the Treatment of Organic Pollutants in Water: Performance Evaluation Using Different Figures of Merit

Electrode material in electrochemical decolorization of dyestuffs wastewater: A review

Development of a New Process for PhenolIn SituOxidation Using a Bifunctional Cathode Reactor

Contact Info

Product

Resources

About