Effects of membrane cation transport on pH and microbial fuel cell performance

R.A. Rozendal, H.V.M. Hamelers, C.J.N. Buisman

Research output: Contribution to journalArticleAcademicpeer-review

548 Citations (Scopus)

Abstract

Due to the excellent proton conductivity of Nation membranes in polymer electrolyte membrane fuel cells (PEMFCs), Nation has been applied also in microbial fuel cells (MFCs). In literature, however, application of Nafion in MFCs has been associated with operational problems. Nafion transports cation species other than protons as well, and in MFCs concentrations of other cation species (Na+, K+, NH4+, Ca 2+, and Mg2+) are typically 105 times higher than the proton concentration. The objective of this study, therefore, was to quantify membrane cation transport in an operating MFC and to evaluate the consequences of this transport for MFC application on wastewaters. We observed that during operation of an MFC mainly cation species other than protons were responsible for the transport of positive charge through the membrane, which resulted in accumulation of these cations and in increased conductivity in the cathode chamber. Furthermore, protons are consumed in the cathode reaction and, consequently, transport of cation species other than protons resulted in an increased pH in the cathode chamber and a decreased MFC performance. Membrane cation transport, therefore, needs to be considered in the development of future MFC systems
Original languageEnglish
Pages (from-to)5206-5211
JournalEnvironmental Science and Technology
Volume40
Issue number17
DOIs
Publication statusPublished - 2006

Keywords

  • electricity-generation
  • ion
  • nafion(r)
  • conductivity
  • electrodes
  • bacterium
  • glucose
  • state
  • h+

Fingerprint Dive into the research topics of 'Effects of membrane cation transport on pH and microbial fuel cell performance'. Together they form a unique fingerprint.

Cite this