The Role of Electrochemical Technology in Wastewater Treatment

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Chemical Processes and Systems".

Deadline for manuscript submissions: 31 August 2024 | Viewed by 417

Special Issue Editor


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Guest Editor
School of Sciences and Engineering, São Paulo State University (UNESP), Campus Tupã, São Paulo, SP, Brazil
Interests: wastewater treatment; advanced oxidative electrochemical; electrochemical processes; electroanalysis; water analysis

Special Issue Information

Dear Colleagues,

Electrochemical technology is a promising option for preventing and minimizing industrial pollution problems caused by wastewater. This technology can be used alongside conventional treatment methods or even replace them, especially in cases of recalcitrant effluents. Electrochemical treatment is considered a “clean process” as it only uses electrons as a reactant, and it also has other advantages, including high energy efficiency; easy handling (relatively simple equipment); safety (operates under ambient temperature and pressure conditions); and versatility.

It is an attractive alternative for the treatment of effluents containing organic compounds through direct or indirect electrooxidation reactions, based on the elimination of pollutants directly on the anode surface and/or the production of hydroxyl radical, a strong and non-selective oxidant, which reacts with most organic compounds very quickly. Advanced oxidative processes based on electrochemical technology are called Advanced Electrochemical Oxidative Processes (EAOPs). The combination of these processes has shown that degradation rates are higher when compared to the degradation rates of individual processes. As a major advantage, EAOPs use as inputs the energy necessary to carry out electrolysis and that used by the UV radiation source, with the only reactants being electrons and photons.

Therefore, we invite you to submit original research to this  Special Issue of Processes, entitled “The Role of Electrochemical Technology in Wastewater Treatment”.

Prof. Dr. Juliane Cristina Forti
Guest Editor

Manuscript Submission Information

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Keywords

  • electrocatalysis
  • eletrooxidation
  • photoelectrochemical
  • advanced electrochemical oxidative processes
  • metal oxides
  • boron-doped diamond (BDD)
  • carbon nanotubes
  • electrogeneration of hydrogen peroxide

Published Papers (1 paper)

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Research

14 pages, 1574 KiB  
Article
Electrochemical Processes Used to Degrade Thiamethoxam in Water and Toxicity Analyses in Non-Target Organisms
by Juliane C. Forti, Pedro E. M. Robles, Yasmin S. Tadayozzi, Maiara A. F. Demori, Felipe A. Santos, Fernando F. Putti and Eduardo F. Vicente
Processes 2024, 12(5), 887; https://doi.org/10.3390/pr12050887 - 27 Apr 2024
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Abstract
Pesticides ensure greater productivity in less time; however, they spread beyond the perimeters to which they are applied to reach non-target organisms, thereby affecting plant, animal, and human health. Thiamethoxam (TMX) is considered to be one of the main agents responsible for poisoning [...] Read more.
Pesticides ensure greater productivity in less time; however, they spread beyond the perimeters to which they are applied to reach non-target organisms, thereby affecting plant, animal, and human health. Thiamethoxam (TMX) is considered to be one of the main agents responsible for poisoning bees and potentially contaminating surface and groundwater. Conventional water-treatment protocols are unable to degrade thiamethoxam; therefore, electrochemically advanced oxidative processes (EAOPs) have become promising alternatives owing to their ease of operation and cost-effectiveness. Herein, we examined the use of EAOPs to oxidize thiamethoxam in commercial Actara® and analyzed treatment efficiencies through phytotoxicity studies using cucumber and maize seeds as bioindicators. In addition, the cost of each process was analyzed based on the resulting current efficiency. The treated solutions were used to germinate seeds that were analyzed for total protein, hydrogen peroxide, lipid peroxidation (MDA), superoxide dismutase (SOD), and catalase (CAT) activities. EAOPs were found to effectively oxidize TMX, with more than 50% degraded and 80% COD removed under all treatment conditions, even when the commercial product was used. The photoelectro-Fenton process using 10 mg L−1 FeSO4 and 100 mg L−1 H2O2 exhibited the best results, with 79% of the TMX degraded and 83% of the COD removed, additionally exhibiting the lowest estimated operating cost (USD 1.01 dm−3). Higher enzymatic SOD and CAT activities, total protein content, and H2O2 concentration were observed; however, no significant changes in MDA were recorded. This treatment protocol effectively oxidizes TMX and reduces its phytotoxicity in maize and cucumber seedlings. Full article
(This article belongs to the Special Issue The Role of Electrochemical Technology in Wastewater Treatment)
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