Bisphenol-S removal via photoelectro-fenton/H2O2 process using Co-porphyrin/Printex L6 gas diffusion electrode

Cordeiro-Junior, Paulo Jorge Marques; Martins, Alysson Stefan; Pereira, George Bueno Santana; Rocha, Fábio R.P.; Rodrigo, Manuel A.; Lanza, Marcos R.V.

doi:10.1016/j.seppur.2021.120299

Cited by 21 publications

(2 citation statements)

References 47 publications

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“…The composition and configuration of the GDE can enhance the conversion of current and oxygen into H 2 O 2 . Several studies have shown that, through the modification of the carbon matrix, one can improve selectivity for two-electron transfers from O 2 to hydrogen peroxide. , For instance, Lu et al. used tert -butyl-anthraquinone to modify various carbon-based materials (including carbon aerogel, carbon nanotube (CNT), carbon black, and graphene-doped carbon black) in a GDE cathode; in all of the cases investigated, the modification of the material led to an increase in CE compared to the unmodified material, with the maximum CE reaching up to 95% …”

Section: Results and Discussionmentioning

confidence: 99%

Insights into Hydrodynamic and Operational Conditions for Scalable Hydrogen Peroxide Electrosynthesis Applications

da Silva Souto,

Souza,

Cordeiro Junior

et al. 2023

Ind. Eng. Chem. Res.

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This study focuses on the development and application of an electrochemical flow reactor (EFR) based on a gas diffusion electrode (GDE) for in situ hydrogen peroxide production via the oxygen reduction reaction. Existing literature lacks comprehensive investigations into GDE-based EFR hydrodynamics and their correlation with electrochemical effects. To help fill this gap in the literature, response surface methodology (RSM) was employed in the present study in order to analyze the hydrodynamic behavior of a GDE-based EFR. The study used the flow rate and interelectrode gap as RSM variables for the analysis of hydrodynamic behavior. Residence time distribution (RTD) was used to assess hydraulic effects, and the results were compared with H 2 O 2 kinetics, where relevant insights were obtained relative to hydraulic and electrochemical effects in the system. The findings of the study point to the importance of hydrodynamic residence time in the EFR and its impact on H 2 O 2 production. Through RSM analysis, the electrochemical conditions (energy consumption, applied current, and oxygen efficiency) of the EFR were evaluated using variables such as current density, O 2 flow rate, and conductivity. The resulting regression equation accurately predicted in situ H 2 O 2 production cost, which was found to align well with the experimental results. The study compared a single-pass system with a common recirculating system in EFRs, where the former exhibited a 32.4% increase in H 2 O 2 electrogeneration efficiency compared to the latter. In summary, this study provides valuable insights into GDE-based EFR hydrodynamics through RSM-based modulation of the operating conditions. The findings of this study help in the scaling of EFR technology and the improvement of H 2 O 2 production efficiency.

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Section: Results and Discussionmentioning

confidence: 99%

Insights into Hydrodynamic and Operational Conditions for Scalable Hydrogen Peroxide Electrosynthesis Applications

da Silva Souto,

Souza,

Cordeiro Junior

et al. 2023

Ind. Eng. Chem. Res.

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“…A negative correlation or a reduction of the relative efficiency was observed with the increase of H2O2 concentration beyond the optimal amount. This behavior might be described by the parasitic interaction of H2O2 with OH -, the competitive electrochemical oxidation of H2O2 on the anode surface, that also releases the weaker oxidant HO2 -, and the evolution of oxygen from H2O2 [16][17].…”

Section: (C) Effect Of [H2o2]: [Fe 2+ ] On Dichloromethane Degradationmentioning

confidence: 99%

Degradation of Dichloromethane Containing Laboratory Wastewater Using Photoelectric Fenton Process

C. Rubi,

C. Cabiles,

C. Reyes

et al. 2023

JSMPM

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Conducting laboratory experiments in educational institutions has been linked with the increased amount of chemical waste disposed in the environment. The excessive usage and disposal of Dichloromethane (DCM) has been attributed to financial and environmental concerns. This present study aimed to treat the DCM containing laboratory wastewater using Photoelectric Fenton(PEF) process. The PEF treatment was done at varying ultraviolet (UV) light intensity (3, 6 and 9 Watts), sacrificial anode (Al, Cu and TiO2), and oxidizing agent (OA) loading ratio (1.13, 3.76, and 6.39 w/w) under 30oC and 1 atm. Results have shown that the highest degradation (99.82%) of DCM was obtained at 9 Watts of UV light intensity, 3.76 w/w [H2O2]: [Fe2+] OA loading ratio, and with TiO2coated with IrO2 and RuO2as the anode. It was detected that higher UV light intensity favors the degradation efficiency when using the TiO2coated with IrO2and RuO2 anode. On the other hand, higher OA loading ratios proved to negatively affect the process as high concentrations of H2O2become ineffectual for the degradation of organics. Finally, analysis of variance (ANOVA) showed the positive correlation between degradation efficiency and UVA light intensity. This confirmed the applicability of the PEF process in degrading of recalcitrant pollutants in wastewater, thus showing potential for mitigating its environmental impact as an eco-friendly and cost-effective approach of wastewater treatment.

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Using Au NPs anchored on ZrO2/carbon black toward more efficient H2O2 electrogeneration in flow-by reactor for carbaryl removal in real wastewater

Kronka

Fortunato

Mira

et al. 2023

Chemical Engineering Journal

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Bisphenol-S removal via photoelectro-fenton/H2O2 process using Co-porphyrin/Printex L6 gas diffusion electrode

Cited by 21 publications

References 47 publications

Insights into Hydrodynamic and Operational Conditions for Scalable Hydrogen Peroxide Electrosynthesis Applications

Insights into Hydrodynamic and Operational Conditions for Scalable Hydrogen Peroxide Electrosynthesis Applications

Degradation of Dichloromethane Containing Laboratory Wastewater Using Photoelectric Fenton Process

Using Au NPs anchored on ZrO2/carbon black toward more efficient H2O2 electrogeneration in flow-by reactor for carbaryl removal in real wastewater

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