ArticleApplied microbiology and biotechnology2020
Biorecovery of cobalt and nickel using biomass-free culture supernatants from Aspergillus niger.
Article in Applied microbiology and biotechnology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed, 32 citations in OpenAlex.
- Solubilization of struvite and biorecovery of cerium by Aspergillus niger.Applied microbiology and biotechnology · 2022Article
- Isolation and Investigation of Natural Rare Earth Metal Chelating Agents FromFrontiers in bioengineering and biotechnology · 2022Article
- Electron microscopic imaging and NanoSIMS investigation on physiological responses ofFrontiers in bioengineering and biotechnology · 2022Article
- Selective fungal bioprecipitation of cobalt and nickel for multiple-product metal recovery.Microbial biotechnology · 2021Article
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Authors and funding
6 authors at 2 institutions in 2 countries.
Funding
Abstract
In this research, the capabilities of culture supernatants generated by the oxalate-producing fungus Aspergillus niger for the bioprecipitation and biorecovery of cobalt and nickel were investigated, as was the influence of extracellular polymeric substances (EPS) on these processes. The removal of cobalt from solution was >90% for all tested Co concentrations: maximal nickel recovery was >80%. Energy-dispersive X-ray analysis (EDXA) and X-ray diffraction (XRD) confirmed the formation of cobalt and nickel oxalate. In a mixture of cobalt and nickel, cobalt oxalate appeared to predominate precipitation and was dependent on the mixture ratios of the two metals. The presence of EPS together with oxalate in solution decreased the recovery of nickel but did not influence the recovery of cobalt. Concentrations of extracellular protein showed a significant decrease after precipitation while no significant difference was found for extracellular polysaccharide concentrations before and after oxalate precipitation. These results showed that extracellular protein rather than extracellular polysaccharide played a more important role in influencing the biorecovery of metal oxalates from solution. Excitation-emission matrix (EEM) fluorescence spectroscopy showed that aromatic protein-like and hydrophobic acid-like substances from the EPS complexed with cobalt but did not for nickel. The humic acid-like substances from the EPS showed a higher affinity for cobalt than for nickel.
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