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

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  • معلومة اضافية
    • Contributors:
      Institut des Sciences Chimiques de Rennes (ISCR); Université de Rennes (UR)-Institut National des Sciences Appliquées - Rennes (INSA Rennes); Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Ecole Nationale Supérieure de Chimie de Rennes (ENSCR)-Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS); Chimie Et Interdisciplinarité : Synthèse, Analyse, Modélisation (CEISAM); Institut de Chimie - CNRS Chimie (INC-CNRS)-Centre National de la Recherche Scientifique (CNRS)-Nantes université - UFR des Sciences et des Techniques (Nantes univ - UFR ST); Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Sciences et technologie; Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ); Région Bretagne is thanked for funding a postdoc position under the Stratégie d′Attractivité Durable Program 2016 (project 9621).
    • بيانات النشر:
      HAL CCSD
      Elsevier
    • الموضوع:
      2022
    • Collection:
      Université de Rennes 1: Publications scientifiques (HAL)
    • نبذة مختصرة :
      International audience ; 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.
    • Relation:
      info:eu-repo/semantics/altIdentifier/pmid/34894599; hal-03558756; https://hal.science/hal-03558756; https://hal.science/hal-03558756/document; https://hal.science/hal-03558756/file/Revised%20Manuscript%20hal.pdf; PUBMED: 34894599
    • الرقم المعرف:
      10.1016/j.colsurfb.2021.112274
    • الدخول الالكتروني :
      https://hal.science/hal-03558756
      https://hal.science/hal-03558756/document
      https://hal.science/hal-03558756/file/Revised%20Manuscript%20hal.pdf
      https://doi.org/10.1016/j.colsurfb.2021.112274
    • Rights:
      info:eu-repo/semantics/OpenAccess
    • الرقم المعرف:
      edsbas.9DD78E8