Assessing the performance of electrochemical oxidation using DSA® and BDD anodes in the presence of UVC light

Sánchez-Montes, Isaac; Pérez, J.F.; Sáez, Cristina; Rodrigo, Manuel A.; Cañizares, Pablo; Aquino, José M.

doi:10.1016/j.chemosphere.2019.124575

Cited by 47 publications

(21 citation statements)

References 39 publications

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“…Complete mineralization of glyphosate was also confirmed by the production of NO 3 − and PO 4 3− ions close to the stoichiometric amounts as predicted by the theoretical equation. Additionally, energy consumption as low as 1.25 kWh•g −1 was attained [73].…”

Section: Photoelectrocatalytic Treatment Processmentioning

confidence: 96%

“…Despite that the large-application of EO technology is under development, it has some advantages such as easy operation, environmentally friendly, easy automation, and also could be attractive from an economic point of view because they can use renewable energy from wind and solar sources. However, high cost of electrodes, possibly low conductivity of effluent, electrode fouling, corrosion phenomena, and the possible formation of intermediaries with bigger impact in water ecosystems or human health are some facts that could be considered as disadvantages of process, but also are some challenges to make effort in order to develop a better water treatment technology [73].…”

Section: Electrochemical Oxidation Processmentioning

confidence: 99%

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Technologies Employed in the Treatment of Water Contaminated with Glyphosate: A Review

et al. 2020

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Glyphosate [N-(phosphonomethyl)-glycine] is a herbicide with several commercial formulations that are used generally in agriculture for the control of various weeds. It is the most used pesticide in the world and comprises multiple constituents (coadjutants, salts, and others) that help to effectively reach the action’s mechanism in plants. Due to its extensive and inadequate use, this herbicide has been frequently detected in water, principally in surface and groundwater nearest to agricultural areas. Its presence in the aquatic environment poses chronic and remote hazards to human health and the environment. Therefore, it becomes necessary to develop treatment processes to remediate aquatic environments polluted with glyphosate, its metabolites, and/or coadjutants. This review is focused on conventional and non-conventional water treatment processes developed for water polluted with glyphosate herbicide; it describes the fundamental mechanism of water treatment processes and their applications are summarized. It addressed biological processes (bacterial and fungi degradation), physicochemical processes (adsorption, membrane filtration), advanced oxidation processes—AOPs (photocatalysis, electrochemical oxidation, photo-electrocatalysis, among others) and combined water treatment processes. Finally, the main operating parameters and the effectiveness of treatment processes are analyzed, ending with an analysis of the challenges in this field of research.

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Section: Photoelectrocatalytic Treatment Processmentioning

confidence: 96%

Section: Electrochemical Oxidation Processmentioning

confidence: 99%

Technologies Employed in the Treatment of Water Contaminated with Glyphosate: A Review

et al. 2020

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“…The subsequent photo-activation of active chlorine by the homolytic rupture of HClO is described by Eq. (15) ( García-Espinoza et al., 2020 ; Sánchez-Montes et al., 2020 ).

…”

Section: Indirect Oxidationmentioning

confidence: 99%

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

et al. 2021

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Disinfection is usually the final step in water treatment and its effectiveness is of paramount importance in ensuring public health. Chlorination, ultraviolet (UV) irradiation and ozone (O 3 ) are currently the most common methods for water disinfection; however, the generation of toxic by-products and the non-remnant effect of UV and O 3 still constitute major drawbacks. Photo-assisted electrochemical advanced oxidation processes (EAOPs) on the other hand, appear as a potentially effective option for water disinfection. In these processes, the synergism between electrochemically produced active species and photo-generated radicals, improve their performance when compared with the corresponding separate processes and with other physical or chemical approaches. In photo-assisted EAOPs the inactivation of pathogens takes place by means of mechanisms that occur at different distances from the anode, that is: (i) directly at the electrode’s surface (direct oxidation), (ii) at the anode’s vicinity by means of electrochemically generated hydroxyl radical species (quasi-direct), (iii) or at the bulk solution (away from the electrode surface) by photo-electrogenerated active species (indirect oxidation). This review addresses state of the art reports concerning the inactivation of pathogens in water by means of photo-assisted EAOPs such as photo-electrocatalytic process, photo-assisted electrochemical oxidation, photo-electrocoagulation and cathodic processes. By focusing on the oxidation mechanism, it was found that while quasi-direct oxidation is the preponderant inactivation mechanism, the photo-electrocatalytic process using semiconductor materials is the most studied method as revealed by numerous reports in the literature. Advantages, disadvantages, trends and perspectives for water disinfection in photo-assisted EAOPs are also analyzed in this work.

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“…Este fenómeno se atribuye a que en procesos de EO con electrolitos como el NaCl y electrodos de DDB se producen altos niveles de cloro activo electro generado, especie que posee propiedades oxidativas, sin embargo este fenómeno disminuye cuando se presenta una incidencia de luz UV (Hurwitz, Pornwongthong, Mahendra, & Hoek,2014;Sánchez-Montes et al, 2020).…”

Section: Instituto Mexicano De Tecnología Del Aguaunclassified

“…Efecto de la luz UV en la electro-oxidación de diclofenaco: a) ausencia de luz y b) presencia de luz UV. en soluciones con un pH de entre 6 y 7 provoca una disminución en la eficiencia del proceso (Hurwitz et al, 2014;Sánchez-Montes et al, 2020).…”

Section: Instituto Mexicano De Tecnología Del Aguaunclassified

Tratamiento del diclofenaco en solución acuosa mediante electro-oxidación utilizando electrodos de DDB

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Castañeda

Linares

et al. 2021

Tecnol. cienc. agua

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The consumption of pharmaceutical products such as non-steroidal antiinflammatories, including 2-[2-(2,6-dichloroanilino) phenyl] acetic acid, better known as diclofenac, has been increasing due to its easy acquisition, as a consequence the environment has had repercussions since it is excreted through the urine, causing a potential risk to be discharged into water bodies and creating persistence in the environment and in the processes of wastewater treatment. Therefore, it is necessary to use alternative processes of advanced oxidation because they have proven to be efficient in the degradation of xenobiotic compounds. The objective of this research was to apply an electro-oxidation system and photoelectro-oxidation by boron-doped diamond (BDD) electrodes using a BDD-BDD configuration to determine the operation variables for the oxidation of diclofenac in aqueous solution. The optimal conditions of the study were: current intensity of 1 A (current density (J) = 25.29 A / m 2 ), the pH of the sample (5-6); NaCl as supporting electrolyte, in the absence of UV light, and treatment time of 360 minutes. The removal efficiency of diclofenac was 97.8 %, the TOC, COD showed efficiencies of 64.4 % and 89.3 %, respectively, whereas the biochemical oxygen demand (BOD5) decrease after of treatment. The degradation kinetic of diclofenac was adjusted to a pseudo first order model, with a half-life time of 63.89 minutes and a k = 1.08 x 10 -2 min -1 . The removal percentages of diclofenac using liquid chromatography (HPLC) were 99.64 %, 98.76 % and 95.15 % for the concentrations of 150, 50 and 10 mg/l, respectively. 2021, Instituto Mexicano de Tecnología del AguaOpen Access bajo la licencia CC BY-NC-SA 4.0

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Assessing the performance of electrochemical oxidation using DSA® and BDD anodes in the presence of UVC light

Cited by 47 publications

References 39 publications

Technologies Employed in the Treatment of Water Contaminated with Glyphosate: A Review

Technologies Employed in the Treatment of Water Contaminated with Glyphosate: A Review

Photo-assisted electrochemical advanced oxidation processes for the disinfection of aqueous solutions: A review

Tratamiento del diclofenaco en solución acuosa mediante electro-oxidación utilizando electrodos de DDB

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