Electro-oxidation of a Commercial Formulation of Glyphosate on Boron-Doped Diamond Electrodes in a Pre-pilot-Scale Single-Compartment Cell

Electrochemical degradation of surfactants in domestic wastewater using a DiaClean® cell equipped with a boron-doped diamond electrode

“…Furthermore, Armijos-Alcocer et al (2017) achieved the maximum rate of degradation of this surfactant at 40 mA cm −2 . On the contrary, Carrera-Cevallos et al (2021) reported that an increase in current density does not necessarily lead to a rise in the oxidation rate because the characteristics of the wastewater and mass transport limitations also affect the efficiency of the process. Nevertheless, the results reported in the aforementioned works were obtained using synthetic wastewater.…”

“…2and dissolved oxygen) that favors the electrogeneration of HORS, which are able to oxidize organic matter present in the aqueous medium until its complete mineralization (reactions 1, 2, and 3) (Armijos-Alcocer et al, 2017;Moreira et al, 2017;De Battisti & Martínez-Huitle, 2018;Espinoza-Montero et al, 2020;Carrera-Cevallos et al, 2021;He et al, 2022). On BDD, the direct electro-oxidation (EO) of organic compounds (R) occurs according to reaction (1), and the indirect/mediated oxidation occurs via HORS, electrogenerated on the anode, such as the physisorbed hydroxyl radical BDD ( • OH) (reactions (2) and ( 3)) and other HORS species as given in the following reactions:…”

“…These species can be radical (e.g., hydroxyl radicals ( • OH), sulfate radical ( ), carbonate radical ( ), superoxide ion ( ), singlet oxygen ( 1 O 2 )) or non-radical (e.g., chlorine species chlorine (Cl 2 ), hypochlorous acid (HClO), hypochlorous ion (ClO − ), and chlorine dioxide (ClO 2 ); peroxydisulfate ( ) and peroxydicarbonate ) anions and hydrogen peroxide (H 2 O 2 )) ( Espinoza-Montero et al, 2022 ; Soliu Oladejo Ganiyu et al, 2021 ). In real wastewaters, we can find a great variety of inorganic ions (e.g., Cl − , HCO 3 − /CO 3 2- , SO 4 2- and dissolved oxygen) that favors the electrogeneration of HORS, which are able to oxidize organic matter present in the aqueous medium until its complete mineralization (reactions 1, 2, and 3) ( Armijos-Alcocer et al, 2017 ; Moreira et al, 2017 ; De Battisti & Martínez-Huitle, 2018 ; Espinoza-Montero et al, 2020 ; Carrera-Cevallos et al, 2021 ; He et al, 2022 ). On BDD, the direct electro-oxidation (EO) of organic compounds (R) occurs according to reaction (1), and the indirect/mediated oxidation occurs via HORS, electrogenerated on the anode, such as the physisorbed hydroxyl radical BDD ( • OH) (reactions (2) and (3)) and other HORS species as given in the following reactions: …”

“…Nevertheless, the nature of anode materials plays an important role in the treatment efficiency, degradation mechanism, and selectivity ( Espinoza et al, 2021 ; He et al, 2022 ). The BDD has demonstrated high efficacy compared to other types of electrodes owing to its wide electrochemical potential window, good chemical/electrochemical stability, and strong corrosion resistance ( Armijos-Alcocer et al, 2017 ; Espinoza-Montero et al, 2013 , 2022Rabbani et al, 2017 ) because of which this diamond electrode has been recognized as the most efficient and ideal anode material, which has been extensively investigated for the degradation of organic contaminants in aquatic environments ( C. Dartsch & Pupunat, 2017 ; Carrera-Cevallos et al, 2021 ; Espinoza-Montero et al, 2022 ; He et al, 2022 ; Oturan & Oturan, 2018 ).…”

Study of The Performance of A Cylindrical Flow-Through Electro-Fenton Reactor Using Different Arrangements of Carbon Felt Electrodes: Degradation of Amoxicillin In Aqueous Solution

“…Due to its physicochemical proprieties such as low LogKow value, low volatility, high stability, high polarity and complex chemical structure (Table 1), the AMX is a persistent compound which may result in eco-toxicological effects and human health affectations (Jones et al 2002) and therefore, AMX is one of the 19 compounds in the watch list of substances being monitored by the European Union (Commission Implementing Decision (EU) 2015). In the context of the interest to develop efficient EAOPs for the degradation of commercial formulations of biorecalcitrant compounds (Murillo-Sierra et al 2018;de Matos et al 2020;Carrera-Cevallos et al 2021), the aim of this work was to evaluate the performance on the degradation of AMX of a flow-through electro-Fenton reactor equipped with carbon felt electrodes. First, residence time distribution was investigated.…”