Ultraviolet‐enhanced Fe⁰‐activated H₂O₂ process for the removal of refractory organic matter from landfill leachate: Performance and mechanism

Water Environment Research, Journal Year: 2025, Volume and Issue: 97(2)

Published: Feb. 1, 2025

Abstract The Fenton‐like process, utilizing zero‐valent iron (Fe 0 ) and hydrogen peroxide (H 2 O ), is employed to degrade refractory organic matter in membrane bioreactor (MBR) effluent derived from landfill leachate. However, the rate‐limiting Fe 2+ /Fe 3+ redox step diminishes treatment efficacy generates substantial sludge. This study elucidates mechanism by which ultraviolet (UV) irradiation augments /H process for removal of MBR effluent. results show that UV‐ enhanced H effectively disrupts aromatic structure compounds, reducing molecular weight, degree polymerization, humification. Compared with efficiency UV 254 , color number, total carbon treated UV/Fe increased 24.16%, 14.62%, 57.46%, respectively. Concurrently, generation sludge was reduced 21.6%. enhancement primarily attributed UV's ability intensify cycle expedite surface corrosion yielding more oxides. accelerates decomposition generating a higher quantity • OH through both homogeneous heterogeneous reactions. removed oxidation OH, as well adsorption precipitation facilitated iron‐based colloids. Practitioner Points promotes dissolve . dosage or influences effect process.

Language: Английский

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Reuse of Sludge from Photo-Fenton Process and Further Application as a Catalyst in Electrochemical Processes for the Treatment of Landfill Leachate

Published: Jan. 1, 2025

This study sought to evaluate the potential of sludge from photo-Fenton advanced oxidative process be transformed into a catalyst for heterogeneous electro-Fenton process. To this end, was dried at 100°C and then heat-treated 600 750°C, which showed that multiferroic structures change according calcination temperature. The results treatment leachate via using under pH 3 condition performed better than without adjustment, achieving, respectively, current densities evaluated (30, 60 90 mA/cm²), COD removal efficiencies 47%, 48% 50% - 15%, 25% 36% TOC 36%, 42% 16%, 20% 30%. However, high value-added products (carboxylic acids) were formed, with possibility selective electroconversion acetic formic acid. heat used on did not enhance its catalytic activity, given similarity when compared those obtained in experiments calcination. From point view decolorization, successful found all conditions evaluated, especially treatments j mA/cm² applied decolorization 80% maximum 94% obtained. proposed has environmental benefits could promising, efficient sustainable path towards circular economy achievement SDGs 6 12.

Language: Английский

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Development of expanded polytetrafluoroethylene hollow fiber membranes for membrane Fenton oxidation in wastewater treatment

Journal of Hazardous Materials, Journal Year: 2025, Volume and Issue: 492, P. 138247 - 138247

Published: April 12, 2025

Language: Английский

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Reuse of sludge from photo-Fenton process and further application as a catalyst in electrochemical processes for the treatment of landfill leachate

Waste Management, Journal Year: 2025, Volume and Issue: 202, P. 114796 - 114796

Published: April 21, 2025

Language: Английский

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Enhancing bimetallic redox cycling by Olsalazine-based MOF to achieve efficient removal of ofloxacin

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 355, P. 129521 - 129521

Published: Sept. 6, 2024

Language: Английский

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