Characterization of Aspergillus niger siderophore that mediates bioleaching of rare earth elements from phosphorites

Osman, Yehia A.; Gebreil, Ahmed; Mowafy, Amr M.; Anan, Tarek; Hamed, Sahar

doi:10.1007/s11274-019-2666-1

Cited by 47 publications

(19 citation statements)

References 36 publications

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“…According to the results of previous publications, the plant growth promotion mechanism of PGP fungi, in particular, Aspergillus spp. and Penicillium spp., can be, at least partially, attributed to the fact that they have the capacity to enhance the solubilization of insoluble phosphate compounds [39,40] and produce IAA [41,42] and siderophore [43,44]. In agreement with these results, the four fungal isolates that were screened in this study all possessed the above-mentioned properties of PGP fungi.…”

Section: Discussionsupporting

confidence: 82%

Effect of Plant-Growth-Promoting Fungi on Eggplant (Solanum melongena L.) in New Reclamation Land

Yan

et al. 2021

Agriculture

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Land reclamation may expand the supply of usable land for food security. Immature soil is not suitable for plant growth and needs to be amended by the addition of organic matter and plant growth-promoting (PGP) microorganisms. However, the effects of different PGP fungi on plant growth in immature soil are largely unexplored. In order to obtain beneficial soil microorganisms with a good PGP ability in new reclamation land, 162 fungal isolates were isolated from different abandoned wastelands, four isolates of which were obtained in this study by the screening of P solubilization, siderophore production, and indole acetic acid (IAA) production. The result of this study revealed that isolate HZ123 had the highest ability to solubilize P and produce siderophores and IAA, followed by HZ23, HZ10, and HZ06. Based on the results of morphological and molecular analyses, isolate HZ06 was identified as Penicillium oxalicum, isolates HZ23 and HZ10 were identified as Aspergillus brunneoviolaceus, and isolate HZ123 was identified as Aspergillus tubingensis. Furthermore, the results of in vivo PGP assays demonstrated that isolate HZ123 has a minimal negative effect on the growth of eggplant; however, the other three isolates, particularly isolate HZ06, caused the greatest increase in eggplant biomasses. Overall, these results indicate that isolate HZ06 has great potential as a PGP fungus to develop biofertilizer for application in eggplant production in immature soil from new reclamation land.

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Section: Discussionsupporting

confidence: 82%

Effect of Plant-Growth-Promoting Fungi on Eggplant (Solanum melongena L.) in New Reclamation Land

Yan

et al. 2021

Agriculture

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“…In addition, the use of organic molecules produced by living organisms will also be explored. It includes highly selective organic molecules produced specifically to recover REEs by methylotroph bacteria such as lanmodulin − but also other molecules produced by plants, bacteria, or fungi than are known to dissolve phosphates and/or REEs in soil (siderophores, − formic acid, succinic acid, malic acid, amino acids...). ,,− In this regard a better knowledge of plants and microorganisms developing in BR deposits may be particularly informative for selecting appropriate bio-inspired extraction strategies. − …”

Section: Discussionmentioning

confidence: 99%

Potential of Ligand-Promoted Dissolution at Mild pH for the Selective Recovery of Rare Earth Elements in Bauxite Residues

Lallemand

Ambrosi

Borschneck

et al. 2022

ACS Sustainable Chem. Eng.

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In a context of overexploitation of natural resources, a circular economy and particularly the extraction of resources from secondary sources, are essential to sustain a number of key technologies including renewable energies. Among secondary sources, bauxite residue contains critical elements including rare earth elements (REEs) (712mg/kg). We investigated the use of soft and selective dissolution protocols at mild pHs (2-6) as an alternative to pyroand hydrometallurgy for the recovery of REEs through ligand-promoted dissolution. This approach depends on the detailed characterization of the waste and the speciation of targeted elements. We assessed dissolution using low molecular weight organic acids (LMWOAs) and their conjugate bases. Citric acid/citrate showed satisfactory dissolution of REEs (up to 50% of light REEs) up to a pH of nearly 5, while tartaric acid/tartrate showed the best dissolution selectivity (enrichment factor up to 21.5 compared to Fe, Al and Ti). Almost no heavy REEs were dissolved in any of the conditions tested, probably due to the high chemical stability of their bearing phases. Indeed, heavy REEs were found as discrete phosphate particles. SynopsisLigand-promoted dissolution, an interesting mechanism for the development of selective recovery processes of REEs from bauxite residue in mild pH conditions.

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“…The factor that generates the phenomenon of selenium bioextraction is most likely the exudation of iron-chelating metabolites, e.g., fungal siderophores [30] and citrate [31], and extrusion of free protons as well [32]. Osman et al [33] noted that the A. niger's siderophores (e.g., ferrichrome) are produced in high quantities in media under iron limitation. Therefore, the contribution of siderophores to the biodeterioration of ferric phases is questionable, since the medium used in this study was not iron deficient, and these metabolites were not quantified.…”

Section: Discussionmentioning

confidence: 99%

Fungal Mobilization of Selenium in the Presence of Hausmannite and Ferric Oxyhydroxides

Farkas

Vojtková

Bujdoš

et al. 2021

JoF

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Bioleaching of mineral phases plays a crucial role in the mobility and availability of various elements, including selenium. Therefore, the leachability of selenium associated with the surfaces of ferric and manganese oxides and oxyhydroxides, the prevailing components of natural geochemical barriers, has been studied in the presence of filamentous fungus. Both geoactive phases were exposed to selenate and subsequently to growing fungus Aspergillus niger for three weeks. This common soil fungus has shown exceptional ability to alter the distribution and mobility of selenium in the presence of both solid phases. The fungus initiated the extensive bioextraction of selenium from the surfaces of amorphous ferric oxyhydroxides, while the hausmannite (Mn3O4) was highly susceptible to biodeterioration in the presence of selenium. This resulted in specific outcomes regarding the selenium, iron, and manganese uptake by fungus and residual selenium concentrations in mineral phases as well. The adverse effects of bioleaching on fungal growth are also discussed.

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Characterization of Aspergillus niger siderophore that mediates bioleaching of rare earth elements from phosphorites

Cited by 47 publications

References 36 publications

Effect of Plant-Growth-Promoting Fungi on Eggplant (Solanum melongena L.) in New Reclamation Land

Effect of Plant-Growth-Promoting Fungi on Eggplant (Solanum melongena L.) in New Reclamation Land

Potential of Ligand-Promoted Dissolution at Mild pH for the Selective Recovery of Rare Earth Elements in Bauxite Residues

Fungal Mobilization of Selenium in the Presence of Hausmannite and Ferric Oxyhydroxides

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