Heterogeneous electro-Fenton system using Fe-MOF as catalyst and electrocatalyst for degradation of pharmaceuticals

Fdez-Sanromán, Antía; Pazos, Marta; Sanromán, M. Angeles; Rosales, Emilio

doi:10.1016/j.chemosphere.2023.139942

Cited by 10 publications

(1 citation statement)

References 54 publications

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“…These data demonstrate that the main degradation route of TC is through the generation of free radicals formed from heterogeneous Fenton-like reactions between the Fe 3+ of Basolite ® F300 and H 2 O 2 at the catalyst surface described by reaction (6). The reduction in ≡Fe 3 induced by a Fenton-like reaction (7) results in the regeneration of ≡Fe 2+ that reacts with hydrogen peroxide to form hydroxyl radicals in an ongoing heterogeneous redox cycle that contributes to an overall degradation of TC [40,41].…”

Section: Degradation Of Tc By Electrochemical Methodsmentioning

confidence: 84%

Metal–Organic Framework Fe-BTC as Heterogeneous Catalyst for Electro-Fenton Treatment of Tetracycline

Fisher,

dos Santos,

Garcia-Segura

2024

Catalysts

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This study explores the use of the iron-containing metal–organic framework (MOF), Basolite®F300, as a heterogeneous catalyst for electrochemically-driven Fenton processes. Electrochemical advanced oxidation processes (EAOPs) have shown promise on the abatement of recalcitrant organic pollutants such as pharmaceuticals. Tetracyclines (TC) are a frequently used class of antibiotics that are now polluting surface water and groundwater sources worldwide. Acknowledging the fast capability of EAOPs to treat persistent pharmaceutical pollutants, we propose an electrochemical Fenton treatment process that is catalyzed by the use of a commercially available MOF material to degrade TC. The efficiency of H2O2 generation in the IrO2/carbon felt setup is highlighted. However, electrochemical oxidation with H2O2 production (ECO-H2O2) alone is not enough to achieve complete TC removal, attributed to the formation of weak oxidant species. Incorporating Basolite®F300 in the heterogeneous electro-Fenton (HEF) process results in complete TC removal within 40 min, showcasing its efficacy. Additionally, this study explores the effect of varying MOF concentrations, indicating optimal removal rates at 100 mg L−1 due to a balance of kinetics and limitation of active sites of the catalysts. Furthermore, the impact of the applied current on TC removal is investigated, revealing a proportional relationship between current and removal rates. The analysis of energy efficiency emphasizes 50 mA as the optimal current, however, balancing removal efficiency with electrical energy consumption. This work highlights the potential of Basolite®F300 as an effective catalyst in the HEF process for pollutant abatement, providing valuable insights into optimizing electrified water treatment applications with MOF nanomaterials to treat organic pollutants.

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