Enhanced mass transport in an electrochemical reactor to promote degradation of organic compounds and improve biodegradability of a mature landfill leachate
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2025-09-16 |
| Journal | Journal of Hazardous Materials |
| Authors | MĂ xim Gibert-Vilas, Yoan PĂ©chaud, Nihal Oturan, Geoffroy Lesage, Laurent Gautron |
| Institutions | Institut Européen des Membranes, Université Gustave Eiffel |
Abstract
Section titled âAbstractâThis study aimed at further developing the electro-oxidation process for partial mineralization of organic pollutants and biodegradability enhancement before subsequent biological treatment. While electro-oxidation using BDD anode is usually limited for such applications by the promotion of organic compounds mineralization rather than fast degradation kinetics, electrodeâs morphology and mass transport/hydrodynamic conditions appeared to be key elements to consider. The use of plate or mesh electrodes in a 1.75 L reactor was first compared for degradation and mineralization of phenol. While similar mineralization kinetics were observed, local mass transport/hydrodynamic conditions at mesh electrodes further promoted phenol degradation and back-diffusion of degradation by-products into the bulk solution. Moreover, mesh electrodes allowed reducing the formation rates of undesired ClOââ» and ClOââ». This reactor configuration was then applied for treatment of a mature landfill leachate with high concentration of recalcitrant organic compounds (TOC = 1.43 gC L<sup>-1</sup>). Partial mineralization (17 %), requiring 21.7 kWh m<sup>-3</sup>, corresponded to a strong increase of biodegradability and average oxidation state of carbon, as well as more than 81 % of fluorophores removal, which appeared as relevant parameter for monitoring such combined process. Besides, competition phenomena associated with oxidation of chlorine and nitrogen compounds were also assessed.
Tech Support
Section titled âTech SupportâOriginal Source
Section titled âOriginal SourceâReferences
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