Electrochemical degradation of indigo carmine, P-nitrosodimethylaniline and clothianidin on a fabricated Ti/SnO2–Sb/Co-βPbO2 electrode: Roles of radicals, water matrices effects and performance

Tien, Hoang Nguyen; Bui, Dinh Nhi; Manh, Tran Duc; Tram, NC Thuy; Ngo, Vu Dinh; Mwazighe, Fredrick M.; Hoang, Hien Y.; Le, Van Thuan

doi:10.1016/j.chemosphere.2022.137352

Cited by 7 publications

(2 citation statements)

References 36 publications

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“…The experiments tested the removal of a solution of 25 mg L −1 of indigo carmine in two water matrices. The concentration was selected based on the literature, i.e., concentrations between 7 and 60 mg for AOP [28,29] and 30 and 60 mg L −1 for adsorption processes [30,31]. In the first investigation phase, the target compound was dissolved in deionised water.…”

Section: Matrix Characterisationmentioning

confidence: 99%

Combination of Photo-Fenton and Granular Activated Carbon for the Removal of Microcontaminants from Municipal Wastewater via an Acidic Dye

Núñez-Tafalla,

Salmerón,

Venditti

et al. 2024

Sustainability

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Combining photo-Fenton and granular activated carbon (GAC) is an alternative to increase the feasibility of using photo-Fenton in full scale. This work is a preliminary study of its viability at natural pH. Both technologies were applied separately and compared with their combination, GAC filtration instead of batch mode, to achieve an approach close to full scale. The target compound considered in this investigation was indigo carmine as a hydroxyl radicals’ probe. The results show that 80% removal of the target compound could be achieved when 20 min of the photo-Fenton treatment time was applied with the optimal dosing of the reagents (5 mg L−1 of iron and 40 mg L−1 of H2O2) working at natural conditions and using ethylenediamine-N,N-disuccinic acid as a chelating agent. Two GAC types, fresh GAC and regenerated, were evaluated on Rapid Small-Scale Columns showing similar breakthroughs and close capacity to adsorb the target compound per gram of GAC. Combining the technologies, with photo-Fenton as the first step and GAC as the second, was performed with 5 min of photo-Fenton treatment time. The 80% removal was maintained during 340 and 170 bed volumes for fresh and regenerated GAC, respectively. Aiming to achieve the maximum reduction of irradiation, 75% of the energy consumption was saved compared to the standalone photo-Fenton process, and the GAC life was extended to a maximum of 7 times.

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Section: Matrix Characterisationmentioning

confidence: 99%

Combination of Photo-Fenton and Granular Activated Carbon for the Removal of Microcontaminants from Municipal Wastewater via an Acidic Dye

Núñez-Tafalla,

Salmerón,

Venditti

et al. 2024

Sustainability

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“…•− -AOPs for contaminated wastewater treatment has been observed, given PMS's advantageous attributes such as high aqueous solubility, subsurface stability, cost-effectiveness, and benign end products [23,37,38]. Additionally, numerous studies have highlighted the significance of direct electron transfer (DET) reactions in contaminant degradation [39][40][41]. Considering the potentially synergistic effects and mechanisms of EAOPs, SAOPs systems, and DET processes in organic pollutant degradation, further attention and comprehensive assessments are warranted.…”

Section: Introductionmentioning

confidence: 99%

Effective Degradation of Metronidazole through Electrochemical Activation of Peroxymonosulfate: Mechanistic Insights and Implications

Liao,

Fang,

Wang

et al. 2024

Energies

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The investigation into the degradation of metronidazole (MNZ), a frequently employed antibiotic, through the electrochemical activation of peroxymonosulfate (PMS) utilizing either boron-doped diamond (BDD) or dimensional stable anode (DSA) as the anode, was conducted in a systematic manner. The enhancement of MNZ removal was observed with increasing current density, PMS dosage, and initial pH. Response surface methodology (RSM), based on a Box–Benken design, was utilized to evaluate the efficiency of MNZ elimination concerning current density (ranging from 11.1 to 33.3 mA/cm2), initial pH (ranging from 3 to 9), PMS dosage (ranging from 1 to 5 mmol·L−1), and reaction time (ranging from 25 to 45 min). The optimal operational conditions for MNZ removal were determined as follows: a current density of 13.3 mA/cm2, a pH of 3.7, a PMS dosage of 2.4 mmol·L−1, and a reaction time of 40 min. Electron paramagnetic resonance (EPR), quenching experiments, and chemical probe experiments confirmed the involvement of •OH, SO4•− and 1O2 radicals as the primary reactive species in MNZ degradation. The presence of HCO3− and H2PO4− hindered MNZ removal, whereas the presence of Cl− accelerated it. The degradation pathways of MNZ were elucidated by identifying intermediates and assessing their toxicity. Additionally, the removal efficiencies of other organic pollutants, such as sulfamethoxazole (SMX), carbamazepine (CBZ), and nitrobenzene (NB), were compared. This study contributes to a comprehensive understanding of MNZ degradation efficiency, mechanisms, and pathways through electrochemical activation of PMS employing BDD or DSA anodes, thereby offering valuable insights for the selection of wastewater treatment systems.

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Chlorobenzene oxidation by electrochemical catalysis with La modified Ti/IrO2-Ta2O5

Yuan,

Chen,

et al. 2024

Applied Catalysis A: General

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Electrochemical degradation of indigo carmine, P-nitrosodimethylaniline and clothianidin on a fabricated Ti/SnO2–Sb/Co-βPbO2 electrode: Roles of radicals, water matrices effects and performance

Cited by 7 publications

References 36 publications

Combination of Photo-Fenton and Granular Activated Carbon for the Removal of Microcontaminants from Municipal Wastewater via an Acidic Dye

Combination of Photo-Fenton and Granular Activated Carbon for the Removal of Microcontaminants from Municipal Wastewater via an Acidic Dye

Effective Degradation of Metronidazole through Electrochemical Activation of Peroxymonosulfate: Mechanistic Insights and Implications

Chlorobenzene oxidation by electrochemical catalysis with La modified Ti/IrO2-Ta2O5

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