TY - JOUR
T1 - A novel aerobic mechanism for reductive palladium biomineralization and recovery by escherichia coli
AU - Foulkes, J.M.
AU - Deplanche, K.
AU - Sargent, F.
AU - Macaskie, L.E.
AU - Lloyd, J.R.
PY - 2016/2/25
Y1 - 2016/2/25
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?eid=2-s2.0-84959228782&partnerID=MN8TOARS
U2 - 10.1080/01490451.2015.1069911
DO - 10.1080/01490451.2015.1069911
M3 - Article
SN - 0149-0451
JO - Geomicrobiology Journal
JF - Geomicrobiology Journal
ER -