Biosorption of rare earth elements by different microorganisms in acidic solutions

verfasst von
Anja Breuker, Simon F. Ritter, Axel Schippers
Abstract

Acidic solutions from metal bioleaching processes usually contain mixtures of metals in different concentrations which need to be separated and concentrated in downstream processing. Aim of this study was to explore and compare biosorption of rare earth elements (REE) by different microorganisms in acidic solutions. Biosorption of REE by bacteria and fungi showed element selective biosorption. The gram-positive bacterium Bacillus subtilis showed a higher selectivity to ytterbium (Yb) and lutetium (Lu) than the gram-negative bacteria Leisingera methylohalidivorans and Phaeobacter inhibens. In contrast, the tested fungi (Catenulostroma chromoblastomyces, Pichia sp.) showed a preference for the middle rare earth elements. Algae exhibited a low biosorption performance. Additionally, for B. subtilis and one yeast (Pichia sp.), better results were achieved with living than dead biomass. This study compares for the first time biosorption of different microorganisms at standardized conditions at low pH und application related conditions.

Externe Organisation(en)
Bundesanstalt für Geowissenschaften und Rohstoffe (BGR)
Typ
Artikel
Journal
Metals
Band
10
Seiten
1-14
Anzahl der Seiten
14
ISSN
2075-4701
Publikationsdatum
15.07.2020
Publikationsstatus
Veröffentlicht
Peer-reviewed
Ja
ASJC Scopus Sachgebiete
Allgemeine Materialwissenschaften
Elektronische Version(en)
https://doi.org/10.3390/met10070954 (Zugang: Offen)