Hydrogen as electron donor for copper removal in bioelectrochemical systems

E. Ntagia, Pau Rodenas Motos, A. ter Heijne, C.J.N. Buisman, T.H.J.A. Sleutels

Research output: Contribution to journalArticleAcademicpeer-review

21 Citations (Scopus)

Abstract

Hydrogen gas is an attractive alternative electron donor since it is produced in large quantities as a side product in the metallurgical industry. Aim of this study was to demonstrate that microbial anodic hydrogen oxidation on a non-catalyzed graphite electrode can be coupled with cathodic copper reduction in a BES to simultaneously recover copper and produce power. The strategy was to first grow an anodic biofilm on acetate, then replace the acetate with hydrogen as electron donor, and finally combine hydrogen oxidation with copper reduction in the cathode. The maximum current density was 1.8 A/m2 at -250 mV anode potential vs Ag/AgCl. When coupled with Cu2+ reduction, the maximum power density was 0.25 W/m2 at a current density of 0.48 A/m2. Anode overpotentials were higher compared to acetate oxidation, probably a result of limited hydrogen solubility and transfer.

Original languageEnglish
Article number41
Pages (from-to)5758-5764
JournalInternational Journal of Hydrogen Energy
DOIs
Publication statusPublished - 2016

Keywords

  • BES
  • Bioelectrochemical system
  • Copper
  • Electron donor
  • Hydrogen

Fingerprint Dive into the research topics of 'Hydrogen as electron donor for copper removal in bioelectrochemical systems'. Together they form a unique fingerprint.

Cite this