Recent advances on the use of active anodes in environmental electrochemistry

Malpass, Geoffroy Roger Pointer; Motheo, Artur J.

doi:10.1016/j.coelec.2021.100689

Cited by 33 publications

(8 citation statements)

References 59 publications

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“…Several reviews had shown the BDD electrodes to be equally or more efficient in removal and mineralization of the most pollutants when compared to Ti‐based mixed metal oxide anodes, IrO 2 , Ti/Pt, or RuO 2 anodes (Mousset et al . 2021; Pointer Malpass and de Jesus Motheo 2021), nevertheless they also reported that the formation of toxic disinfection byproducts (such a chlorate and perchlorate) is more prominent at BDDE, which must be addressed prior to any large‐scale applications. Especially since establishing the correct experimental and operating conditions is crucial to minimize the formation of these unwanted byproducts while simultaneously maximizing the disinfection action (Martínez‐Huitle and Brillas 2021).…”

Section: Resultsmentioning

confidence: 99%

Impact of electrolyte solution on electrochemical oxidation treatment of Escherichia coli K-12 by boron-doped diamond electrodes

Budil

Szabó

Lišková

et al. 2022

Letters in Applied Microbiology

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We studied the disinfection efficacy of boron‐doped electrodes on Escherichia coli‐contaminated water‐based solutions in three different electrolytes, physiological solution (NaCl), phosphate buffer (PB), and phosphate buffer saline (PBS). The effect of the electrochemical oxidation treatment on the bacteria viability was studied by drop and spread plate cultivation methods, and supported by optical density measurements. We have found that bacterial suspensions in NaCl and PBS underwent a total inactivation of all viable bacteria within 10 min of the electrochemical treatment. By contrast, experiments performed in the PB showed a relatively minor decrease of viability by two orders of magnitude after 2 h of the treatment, which is almost comparable with the untreated control. The enhanced bacterial inactivation was assigned to reactive chlorine species, capable of penetrating the bacterial cytoplasmic membrane and killing bacteria from within.

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Section: Resultsmentioning

confidence: 99%

Impact of electrolyte solution on electrochemical oxidation treatment of Escherichia coli K-12 by boron-doped diamond electrodes

Budil

Szabó

Lišková

et al. 2022

Letters in Applied Microbiology

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“…However, in the last five years, progress in the development of this technology slowed down, and no relevant challenges were identified except the search for synergistic combinations between electrochemical technology and other technologies looking for the activation of oxidants during the electrolytic process, especially with photochemical and sonochemical technologies. − Also, the search for new applications and the expansion of the possibilities of treating liquid to gaseous waste through electrochemically assisted reactive absorption processes was also set as a new objective, something that has been successfully addressed. − …”

Section: Introductionmentioning

confidence: 99%

Design, Validation, and Fabrication of a Tailored Electrochemical Reactor Using 3D Printing for Studies of Commercial Boron-Doped Diamond Electrodes

Vernasqui,

Montiel,

Gomes Ferreira

et al. 2024

Ind. Eng. Chem. Res.

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Boron-doped diamond (BDD) electrodes are the most effective and resistant electrodic materials to perform advanced oxidation processes. Having a reactor that can provide adequate hydrodynamic conditions is mandatory to use these electrodes effectively. In this work, the diamond anode electrochemical reactor (E3L-DAER) is designed to fulfill this necessity. Several features are included to improve its efficiency, like conic inlet/outlet, flow enhancers, and a reduced interelectrode gap. The fluid dynamic validation has been performed using computer fluid dynamics (CFD) calculations, residence time distribution (RDT) curves, and mass transfer analysis. The reactor has been made using a threedimensional (3D) printing stereolithography (SLA) technique, which allows us to build chemical-resistant reactors with nonstandard and tailored features in a cheap and fast way. The obtained results demonstrate that the designed reactor has the required fluid dynamics properties to perform reliable BDD electrode studies and applications. Finally, a BDD electrode was used to test the production of different oxidants such as persulfate, peroxophosphate, and chlorine-derived species.

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“…Electrochemical-based technologies have attracted increasing attention as substitutes for conventional methods of treating effluents that contain toxic and persistent organic pollutants in wastewater [1,5]. The efficacy of electrochemical techniques has been widely documented in the literature covering a wide range of techniques [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Experimental design for combined abatement of organic compounds present in urine

et al. 2023

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Organic compounds contained in urine, such as urea and creatinine, can compete with pharmaceuticals for the electro‐generated oxidants during electrochemical treatment. In addition, urine has a large amount of chloride ions, creating opportunities to produce chlorine and aqueous‐free chlorine species via electrolysis. The aim of the present study is to analyze artificial urine as a supporting electrolyte, while studying the removal of the organic components present (urea and creatinine) by employing an experimental design approach. A 2³ factorial design was employed to evaluate the efficiency of the photo‐assisted sonoelectrochemical (EC/UV/US) process. Operating conditions were optimized using response surface methodology (MRS), namely: 11.44 mL min−1 flow, 1.940 A at 160 min. The pH was analyzed and a predominance of HOCl (pH < 7.0) can be observed. Response surface methodology was used to investigate the effects and interactions of flow rate, time, and current to track the removal efficiency of organic compounds contained in artificial urine (TOC, creatinine, and urea). Over prolonged electrolysis, the EC/US/UV process achieved removal of TOC (25.7%), creatinine (68.2%), and urea (33.3%), due to the large contribution of highly reactive radical species (•OH, •Cl, ClO−).

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Recent advances on the use of active anodes in environmental electrochemistry

Cited by 33 publications

References 59 publications

Impact of electrolyte solution on electrochemical oxidation treatment of Escherichia coli K-12 by boron-doped diamond electrodes

Impact of electrolyte solution on electrochemical oxidation treatment of Escherichia coli K-12 by boron-doped diamond electrodes

Design, Validation, and Fabrication of a Tailored Electrochemical Reactor Using 3D Printing for Studies of Commercial Boron-Doped Diamond Electrodes

Experimental design for combined abatement of organic compounds present in urine

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