Spurenelement-Signaturen von Magnetite produziert durch eisenmetabolisierende Bakterien

• Antragsteller: Professor Dr. Andreas Kappler; Professor Ronny Schönberg, Ph.D.
• Fachliche Zuordnung: Mineralogie, Petrologie und Geochemie
• Förderung: Förderung von 2016 bis 2019
• Projektkennung: Deutsche Forschungsgemeinschaft (DFG) - Projektnummer 287174037

• Erstellungsjahr: 2021

Zusammenfassung der Projektergebnisse

In summary, we have used this project to investigate several important issues relevant to the interactions between iron-metabolizing bacteria and iron minerals. Through this work, we were able to show that (1) green rust can be oxidized by Fe(II)-oxidizing bacteria, leading to the precipitation of short Fe(III) (oxyhydr)oxides; (2) microbial biomass inhibits abiotic transformation of ferrihydrite to magnetite but that biotic transformation is simply slowed; (3) the Zn and Ni trace element content of magnetite in ancient iron formations could potentially be used as a biomarker to identify microbiological processes.

Projektbezogene Publikationen (Auswahl)

• (2018) Microbial anaerobic Fe(II) oxidation – ecology, mechanisms and environmental implications. Environmental Microbiology, 20, 3462-3483
  Bryce, C., Blackwell, N., Schmidt, C., Otte, J., Huang, Y., Kleindienst, S., Tomaszewski, E., Schad, M., Warter, V., Peng, C., Byrne, J.M., Kappler, A.
  
• (2018) Phytoplankton contributions to the trace element composition of Precambrian banded iron formation. Geological Society of America Bulletin 130, 941- 951
  Konhauser, K.O., Robbins, L.J., Alessi, D.S., Flynn, S.L., Gingras, M.K., Martinez, R.E., Kappler, A., Swanner, E.D., Li, Y.L., Crowe, S.A., Lalonde, S.V.
  
• (2019) Reusable magnetite nanoparticle – biochar composites for the efficient removal of chromate from water. Scientific Reports
  Alam, S., Bishop, B., Chen, N., Safari, S., Warter, V., Byrne, J.M., Warchola, T., Kappler, A., Konhauser, K.O., Alessi, Daniel
  
• (2020) Effect of Microbial Biomass and Humic Acids on Abiotic and Biotic Magnetite Formation. ES&T
  Han, X., Tomaszewski, E., Sorwat, J., Pan, Y., Kappler, A., Byrne, J.M.
  
• (2020) Oxidation of green rust by anoxygenic phototrophic Fe(II)-oxidizing bacteria. Geochemical Perspectives Letters, 12, 52-57
  Han, X., Tomaszewski, E.J., Sorwat, J., Pan, Y., Kappler, A., Byrne, J.M.