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) Phytoplankton contributions to the trace element composition of Precambrian banded iron formation. Geological Society of America Bulletin 130, 941- 951
  Konhauser, Kurt O.; Robbins, Leslie J.; Alessi, Daniel S.; Flynn, Shannon L.; Gingras, Murray K.; Martinez, Raul E.; Kappler, Andreas; Swanner, Elizabeth D.; Li, Yi-Liang; Crowe, Sean A.; Planavsky, Noah J.; Reinhard, Christopher T. & Lalonde, Stefan V.
  
• (2018) Microbial anaerobic Fe(II) oxidation – ecology, mechanisms and environmental implications. Environmental Microbiology, 20, 3462-3483
  Bryce, Casey; Blackwell, Nia; Schmidt, Caroline; Otte, Julia; Huang, Yu‐Ming; Kleindienst, Sara; Tomaszewski, Elizabeth; Schad, Manuel; Warter, Viola; Peng, Chao; Byrne, James M. & Kappler, Andreas
  
• (2019) Reusable magnetite nanoparticle – biochar composites for the efficient removal of chromate from water. Scientific Reports
  Alam, Md. Samrat; Bishop, Brendan; Chen, Ning; Safari, Salman; Warter, Viola; Byrne, James M.; Warchola, Tyler; Kappler, Andreas; Konhauser, Kurt O. & Alessi, Daniel S.
  
• (2020) Effect of Microbial Biomass and Humic Acids on Abiotic and Biotic Magnetite Formation. ES&T
  Han, Xiaohua; Tomaszewski, Elizabeth J.; Sorwat, Julian; Pan, Yongxin; Kappler, Andreas & Byrne, James 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.