Space station biomining experiment demonstrates rare earth element extraction in microgravity and Mars gravity

Charles S. Cockell, Rosa Santomartino, Kai Finster, Annemiek Waajen, Lorna J. Eades, Ralf Moeller, Petra Rettberg, Felix M. Fuchs, Rob Van Houdt, Natalie Leys, Ilse Coninx, Jason Hatton, Luca Parmitano, Jutta Krause, Andrea Koehler, Nicol Caplin, Lobke Zuijderduijn, Alessandro Mariani, Stefano S Pellari, Fabrizio CarubiaGiacomo Luciani, Michele Balsamo, Valfredo Zolesi, Tasha Nicholson, Claire Marie Loudon, Jeannine Doswald-Winkler, Magdalena Herova, Bernd Rattenbacher, Jennifer Wadsworth, R Craig Everroad, Rene Demets

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Microorganisms are employed to mine economically important elements from rocks, including the rare earth elements (REEs), used in electronic industries and alloy production. We carried out a mining experiment on the International Space Station to test hypotheses on the bioleaching of REEs from basaltic rock in microgravity and simulated Mars and Earth gravity using three microorganisms and a purposely designed biomining reactor. Sphingomonas desiccabilis enhanced mean leached concentrations of REEs compared to non-biological controls in all gravity conditions. No significant difference in final yields was observed between gravity conditions, showing the efficacy of the process under different gravity regimens. Bacillus subtilis exhibited a reduction in bioleaching efficacy and Cupriavidus metallidurans showed no difference compared to non-biological controls, showing the microbial specificity of the process, as on Earth. These data demonstrate the potential for space biomining and the principles of a reactor to advance human industry and mining beyond Earth.
Original languageEnglish
Article number5523
JournalNature Communications
Publication statusPublished - 10 Nov 2020


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