Electrografted anthraquinone to monitor pH at the biofilm-anode interface in a wastewater microbial fuel cell - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Colloids and Surfaces B: Biointerfaces Année : 2022

Electrografted anthraquinone to monitor pH at the biofilm-anode interface in a wastewater microbial fuel cell

Résumé

Electrografted anthraquinone on graphite was used as a probe to monitor the pH change at the biofilm-electrode interface at the anode of a microbial fuel cell inoculated with wastewater. The grafting procedure was optimized so that the pH-dependent electrochemical response of the grafted quinone did not overlay with that of the electroactive biofilm. The variation of the formal potential of the grafted quinone as a function of pH was linear over the pH range 1-10 with a slope of - 64 mV. This allowed to monitor the interfacial pH change over three weeks of biofilm colonization of the electrode. During that time the interfacial pH decreased from neutrality to 5.3 while the anolyte only acidified down to pH 6.2. This finding is relevant as local pH change usually leads to alterations of the bioenergetics process of microbial communities and hence on the performance of bioelectrochemical devices.
Fichier principal
Vignette du fichier
Revised Manuscript hal.pdf (571.89 Ko) Télécharger le fichier
Supporting Information.pdf (578.27 Ko) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03558756 , version 1 (04-02-2022)

Identifiants

Citer

Nazua L Costa, Germaine Olorounto, Estelle Lebègue, F Barriere. Electrografted anthraquinone to monitor pH at the biofilm-anode interface in a wastewater microbial fuel cell. Colloids and Surfaces B: Biointerfaces, 2022, 210, pp.112274. ⟨10.1016/j.colsurfb.2021.112274⟩. ⟨hal-03558756⟩
54 Consultations
91 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More