Electro-Fenton degradation of a ternary pharmaceutical mixture and its application in the regeneration of spent biochar

Puga, Antón; Moreira, Manuela M.; Figueiredo, Sónia; Delerue–Matos, Cristina; Pazos, Marta; Rosales, Emílio; Sanromán, M.A.

doi:10.1016/j.jelechem.2021.115135

Cited by 25 publications

(6 citation statements)

References 46 publications

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“…However, it is important to highlight that the amount of iron lixiviated to the solution corresponds to iron concentrations between 0.006-0.061 mM, which are far below those used in the homogeneous EF treatment in this study (0.25 mM) and other optimal values reported in the literature by several authors (typically in the range of 0.3-1.0 mM) [44][45][46][47][48]. This would suggest that the heterogeneous catalysis is the predominant mechanism.…”

Section: Heterogeneous Catalysismentioning

confidence: 68%

Exploring the use of carbon materials as cathodes in electrochemical advanced oxidation processes for the degradation of antibiotics

Poza-Nogueiras¹,

Gomis‐Berenguer²,

Pazos³

et al. 2022

Journal of Environmental Chemical Engineering

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Section: Heterogeneous Catalysismentioning

confidence: 68%

Exploring the use of carbon materials as cathodes in electrochemical advanced oxidation processes for the degradation of antibiotics

Poza-Nogueiras¹,

Gomis‐Berenguer²,

Pazos³

et al. 2022

Journal of Environmental Chemical Engineering

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“…Simultaneously, the EF system, through the generation of highly reactive hydroxyl radicals, provides an efficient means to degrade recalcitrant pollutants (Puga et al, 2021). The integration of these technologies, coupled with the electrode material comparison, aims to create a robust and synergistic system that not only effectively treats the wastewater but also considers the economic viability and environmental impact associated with electrode material selection.…”

Section: Introductionmentioning

confidence: 99%

Electrode material impact on microbial fuel cell and electro‐Fenton systems for enhanced slaughterhouse wastewater treatment: A comparative study of graphite and titanium

Mkilima,

Saspugayeva,

Tussupova

et al. 2024

Water Environment Research

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The treatment of slaughterhouse wastewater is a complex task demanding careful consideration due to its challenging nature. Therefore, exploring more sustainable treatment methods for this particular type of wastewater is of utmost significance. This research focused on the impact of electrode materials, specifically graphite and titanium, on the efficiency of microbial fuel cells (MFCs) and electro‐Fenton systems in treating slaughterhouse wastewater. Both graphite and titanium electrodes displayed increasing current density trends, with titanium outperforming graphite. Titanium showed superior electron transfer and current generation (2.2 to 21.2 mA/m2), while graphite ranged from 2.4 to 18.9 mA/m2. Titanium consistently exhibited higher power density, indicating better efficiency in converting current to power (0.059 to 22.68 mW/m2), compared to graphite (0.059 to 12.25 mW/m2) over the 48‐h period. In removal efficiency within the MFC system alone, titanium exhibited superior performance over graphite in key parameters, including zinc (45.5% vs. 37.19%), total hardness (39.32% vs. 29.4%), and nitrates (66.87% vs. 55.8%). For the electro‐Fenton system with a graphite electrode, the removal efficiency ranged from 34.1% to 87.5%, with an average efficiency of approximately 56.2%. This variability underscores fluctuations in the efficacy of the graphite electrode across diverse wastewater treatment scenarios. On the other hand, the electro‐Fenton system employing a titanium electrode showed removal efficiency values ranging from 26.53% to 89.99%, with an average efficiency of about 68.4%. The titanium electrode exhibits both a comparatively higher and more consistent removal efficiency across the evaluated scenarios. On the other hand, the integrated system achieved more than 90% removal efficiency from most of the parameters. The study underscores the intricate nature of slaughterhouse wastewater treatment, emphasizing the need for sustainable approaches.Practitioner Points Microbial fuel cell (MFC) and electro‐Fenton were investigated for slaughterhouse wastewater treatment. The MFC microbial activity started to decrease after 24 h. The integrated system achieved up to 99.8% removal efficiency (RE) for total coliform bacteria. Up to 99.4% of RE was also achieved for total suspended solids (TSS). The integrated system highly improved RE of the pollutants.

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“…These processes based on the in-situ generation of powerful reactive species, in this case hydroxyl radicals, aim essentially at degrading and mineralizing organic compounds. There are several advanced oxidation process (AOPs) among which there are anodic oxidation [14][15][16][17][18], Sono-Fenton [19], Fenton-like [20], electro-Fenton [21][22][23][24], ozonation [25,26] and Fenton [27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Degradation of Pharmaceuticals from Simulated and Real Hospital Wastewater applying Conventionnal Fenton Process: Optimization conditions and application

Appia

Ouattra

2023

Preprint

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This study concerns the treatment of simulated and real hospital wastewater enriched in amoxicillin (AMX), ceftriaxone (CTX) and telebrix (TLX) by the Fenton process. The initial concentration of the compound, the molar ratio [H2O2]/[Fe2+]=k and the pH were used to determine the optimal conditions on the simulated wastewater. Then comes the study of the effects of inorganic ions, temperature and degradation of CTX and TLX. Chemical oxygen requirements (COD) and amoxicillin concentrations were used to monitor the experiments. The results obtained indicate that the optimum degradation (78.86%) is obtained at 0.5mM from the initial concentration, k=2 and pH=3. For instance, it has been found that the Fenton process does not degrade pharmaceuticals with the same efficacy. Furthermore, inorganic ions and high temperature reduce the performance of conventional Fenton. Moreover, this process hardly degrades (37.05%) real hospital wastewater, which contain inorganic ions in terms of COD removal. However, the successive addition of Fenton reagents provides a better COD removal rate for the treatment of this actual wastewater (88.96%). On the other hand, alternatives such as increasing the molar ratio as well as decreasing the quantities of Fenton reagents while keeping k constant did not have a positive effect on the removal rate of the actual wastewater. The formation of intermediate compounds was shown by comparison of the evolution of the concentration of the compound and the COD.

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Electro-Fenton degradation of a ternary pharmaceutical mixture and its application in the regeneration of spent biochar

Cited by 25 publications

References 46 publications

Exploring the use of carbon materials as cathodes in electrochemical advanced oxidation processes for the degradation of antibiotics

Exploring the use of carbon materials as cathodes in electrochemical advanced oxidation processes for the degradation of antibiotics

Electrode material impact on microbial fuel cell and electro‐Fenton systems for enhanced slaughterhouse wastewater treatment: A comparative study of graphite and titanium

Degradation of Pharmaceuticals from Simulated and Real Hospital Wastewater applying Conventionnal Fenton Process: Optimization conditions and application

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