Abstract
Aerobically grown E. coli cells reduced Pd(II) via a novel mechanism using formate as the electron donor. This reduction was monitored in real-time using extended X-ray absorption fine structure. Transmission electron microscopy analysis showed that Pd(0) nanoparticles, confirmed by X-ray diffraction, were precipitated outside the cells. The rate of Pd(II) reduction by E. coli mutants deficient in a range of oxidoreductases was measured, suggesting a molybdoprotein-mediated mechanism, distinct from the hydrogenase-mediated Pd(II) reduction previously described for anaerobically grown E. coli cultures. The potential implications for Pd(II) recovery and bioPd catalyst fabrication are discussed.
Original language | English |
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Pages (from-to) | 230-236 |
Number of pages | 7 |
Journal | Geomicrobiology Journal |
Volume | 33 |
Issue number | 3-4 |
Early online date | 25 Feb 2016 |
DOIs | |
Publication status | Published - 15 Mar 2016 |
Keywords
- Biomineralization
- Escherichia coli
- palladium nanoparticles
ASJC Scopus subject areas
- Earth and Planetary Sciences (miscellaneous)
- Microbiology
- Environmental Science(all)
- Environmental Chemistry