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Industrially scalable surface treatments to enhance the current density output from graphite bioanodes fueled by real domestic wastewater

Roubaud, Emma and Lacroix, Rémy and Da Silva, Serge and Esvan, Jérôme and Etcheverry, Luc and Bergel, Alain and Basséguy, Régine and Erable, Benjamin Industrially scalable surface treatments to enhance the current density output from graphite bioanodes fueled by real domestic wastewater. (2021) iScience, 24 (3). 102162. ISSN 2589-0042

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Official URL: https://doi.org/10.1016/j.isci.2021.102162

Abstract

Acid and electrochemical surface treatments of graphite electrode, used individually or in combination, significantly improved the microbial anode current production, by +17% to +56%, in well-regulated and duplicated electroanalytical experimental systems. Of all the consequences induced by surface treatments, the modifications of the surface nano-topography preferentially justify an improvement in the fixation of bacteria, and an increase of the specific surface area and the electrochemically accessible surface of graphite electrodes, which are at the origin of the higher performances of the bioanodes supplied with domestic wastewater. The evolution of the chemical composition and the appearance of C-O, C=O, and O=C-O groups on the graphite surface created by combining acid and electrochemical treatments was prejudicial to the formation of efficient domestic-wastewater-oxidizing bioanodes. The comparative discussion, focused on the positioning of the performances, shows the industrial interest of applying the surface treatment method to the world of bioelectrochemical systems.

Item Type:Article
Additional Information:This is an open access article under the CC BY license
HAL Id:hal-03164721
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:Other partners > 6T-MIC Ingenieries (FRANCE)
Other partners > 6T-MIC Ingenieries (FRANCE)

French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
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Deposited On:10 Mar 2021 09:29

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