Isolation and Investigation of Natural Rare Earth Metal Chelating Agents From Calothrix brevissima—A Step Towards Unraveling the Mechanisms of Metal Biosorption.
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biomass with chromatographic methods for the first time. Molecular characterization showed that the isolated compounds are most likely polysaccharides comprised of arabinose, xylose, mannose, galactose and glucose. FT-IR analysis revealed functional groups involved in the binding mechanism of Tb are likely sulfate- and to a lesser extend hydroxyl-groups. The binding specificity of the isolated compounds was investigated with different metal solutions. Here, ions of the alkali and alkaline earth metals Na, K, Mg and Ca showed no competition for Tb-binding even at 10-fold excess concentration. Ions of the elements Co and Pb on the other hand replaced Tb at higher concentrations. Addition of the isolated compounds significantly reduced the precipitation of Eu at pH-values between 6.7 and 9.5, indicating that the interaction between the isolated chelators and Rare Earth Metals is stable even at high pH-values.
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Bioleaching or biomining employs microbes such as Acidithiobacillus ferrooxidans that can bind and recover metals, bypassing the need for high temperatures and toxic chemicals.
“One alternative is bioleaching or biomining, which employs microbes such as Acidithiobacillus ferrooxidans that can bind and recover metals, bypassing the need for high temperatures and toxic chemicals [87–90].”
From The potential of biofuels from first to fourth generation (2023) · cites this paper as [90]
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- Authors
- Jurkowski, W., Paper, M., & Brück, T. B.
- Affiliations
- Technical University of Munich (DE)
- Corresponding author
- Brück, Thomas B.
- ORCID
- Brück, Thomas B.
- Venue
- Frontiers in Bioengineering and Biotechnology
- Publisher
- Frontiers Media SA
- Published
- 2022-02-10
- Volume
- 10
- Pages
- 833122-833122
- ISSN
- 2296-4185 (ISSN-L)
- PMC
- PMC8866756
- OpenAlex
- W4211110493
- Cited by
- 24
- References
- 49
- Citations by year
- 2026: 5 · 2025: 10 · 2024: 1 · 2023: 7 · 2022: 1
- FWCI
- 1.39
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Frontiers in Bioengineering and Biotechnology (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- mediaTUM (Technical University of Munich) (submittedVersion, other-oa)
- Funders
- Bayerisches Staatsministerium für Umwelt und Verbraucherschutz
- Topics
- Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
- Physical Sciences › Materials Science › Materials Chemistry › Lanthanide and Transition Metal Complexes
- Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
- Keywords
- rare earth elements, chelating agents, metal biosorption, polysaccharides, thulium, sulfate groups, cyanobacterial biomass, metal removal from water
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