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Water
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Application of Electrochemical Technologies in Water and Wastewater Treatment
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Application of Electrochemical Technologies in Water and Wastewater Treatment

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Wastewater Treatment and Reuse".

Deadline for manuscript submissions: closed (30 September 2023) | Viewed by 3256

Special Issue Editor

Dr. Nuno Graça

E-Mail Website
Guest Editor
Laboratory of Separation and Reaction Engineering, Department of Chemical Engineering, Faculty of Engineering, University of Porto, 4099-002 Porto, Portugal
Interests: process intensification; multifunctional reactors; adsorption processes; simulated moving bed reactors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

I invite you to submit a manuscript related to the application of electrochemical technologies in water and wastewater treatment for consideration for publication in a Special Issue of Water.

The scope of this Special Issue will include innovative applications of electrochemical technologies for the treatment of water and wastewater. These applications can include hybrid processes, where the electrochemical technologies are combined with other processes to enhance their performance. Additionally, works related to the mathematical modeling, simulation, and optimization of electrochemical technologies for water and wastewater treatment will be also in the scope of this Special Issue.

Dr. Nuno Graça
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • electrocoagulation
  • electrooxidation
  • electrochemical technologies
  • wastewater
  • hybrid processes
  • modeling

Published Papers (2 papers)

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Research

16 pages, 3019 KiB  
Article
Parametric Mathematical Model of the Electrochemical Degradation of 2-Chlorophenol in a Flow-by Reactor under Batch Recirculation Mode
by Alejandro Regalado-Méndez, Guadalupe Ramos-Hernández, Reyna Natividad, Mario E. Cordero, Luis Zárate, Edson E. Robles-Gómez, Hugo Pérez-Pastenes and Ever Peralta-Reyes
Water 2023, 15(24), 4276; https://doi.org/10.3390/w15244276 - 14 Dec 2023
Cited by 1 | Viewed by 1245
Abstract
2-Chlorophenol (2-CP) is a dangerous organic contaminant found in wastewater. In this work, 2.5 L of a 2-CP solution (1 mol/m3) was electrochemically treated in a flow-by reactor equipped with two boron-doped diamond electrodes (BDD) under batch recirculation mode for a [...] Read more.
2-Chlorophenol (2-CP) is a dangerous organic contaminant found in wastewater. In this work, 2.5 L of a 2-CP solution (1 mol/m3) was electrochemically treated in a flow-by reactor equipped with two boron-doped diamond electrodes (BDD) under batch recirculation mode for a period for 4 h, a current density of 0.14 A/cm2, a volumetric flow rate of 1 L/min, and pH = 7.3. In this work, a parametric mathematical model of the degradation efficiency of 2-CP was developed using an axial dispersion model and a continuous stirred tank for the flow-by reactor (FBR), which was constructed using a shell mass balance considering the dispersion and convection terms and the reservoir tank (CST), which was constructed using a mass balance of 2-CP. The parametric mathematic model of the electrochemical degradation of 2-chlorophenol was numerically resolved by employing the software package COMSOL Multiphysics® V. 5.3, where a mass transfer equation for diluted species and a global differential equation represents the FBR and CST, respectively. The results indicate that the parametric mathematical model proposed in this research fits the experimental results, and this is supported by the index performance values such as the determination coefficient (R2 = 0.9831), the mean square error (MSE = 0.0307), and the reduced root-mean-square error (RMSE = 0.1754). Moreover, the degradation efficiency of 2-CP estimated by the proposed model achieves 99.06%, whereas the experimental degradation efficiency reached 99.99%, a comparative error of 0.93%. This corroborates the predictive ability of the developed mathematical model and the effectiveness of the employed electrooxidation process. Finally, a 0.143 USD/L total operating cost for the electrochemical plant was estimated. Full article
(This article belongs to the Special Issue Application of Electrochemical Technologies in Water and Wastewater Treatment)
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16 pages, 7641 KiB  
Article
Enhanced Electrocatalytic Oxidation of Phenol by SnO2-Sb2O3/GAC Particle Electrodes in a Three-Dimensional Electrochemical Oxidation System
by Yu Pu, Fan Zhao, Yini Chen, Xiangyu Lin, Haoran Yin and Xinhua Tang
Water 2023, 15(10), 1844; https://doi.org/10.3390/w15101844 - 12 May 2023
Cited by 2 | Viewed by 1634
Abstract
In this study, SnO2-Sb2O3/GAC particle electrodes were prepared using the dip-calcination method. The particle electrodes were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET), thermogravimetric test and linear sweep voltammetry (LSV), which [...] Read more.
In this study, SnO2-Sb2O3/GAC particle electrodes were prepared using the dip-calcination method. The particle electrodes were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Brunauer Emmett Teller (BET), thermogravimetric test and linear sweep voltammetry (LSV), which proved that the metal oxide was successfully loaded on the granular activated carbon and exhibited high electrocatalytic activity and thermal stability. The effects of initial pH, electrolytic voltage, electrolyte concentration, initial phenol concentration and particle electrode dosage on the performance of the three-dimensional (3D) electrocatalytic oxidation in phenol degradation were investigated. The results showed that under the optimal conditions, the removal rates of phenol and chemical oxygen demand (COD) were 99.65% and 67.16%, respectively. Finally, it was found that the novel particle electrodes had the ability of stable operation, maintaining high-efficiency operation no less than 15 times, which further highlights their robustness and durability. Full article
(This article belongs to the Special Issue Application of Electrochemical Technologies in Water and Wastewater Treatment)
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