Chemical mimicking of bio-assisted aluminium extraction by Aspergillus niger’s exometabolites

Boriová, Katarína; Urík, Martin; Bujdoš, Marek; Pifková, Ivana

doi:10.1016/j.envpol.2016.07.003

Cited by 12 publications

(4 citation statements)

References 46 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A. niger is well known for the high rate of extracellular metabolite production. Oxalic acid is the most produced of organic acids by the fungus when grown on Sabouraud growth media [30].…”

Section: Transformation Of Zno Nanoparticles By Fungal Extracellular mentioning

confidence: 99%

“…The amino acids, carboxylic acids, phenolic compounds, and siderophores are some known metabolites with the aforementioned properties [28]. Among the strong chelating agents, oxalic acid was shown to be produced in large quantities by A. niger and other fungi [29,30]. The extraction efficiency of oxalic acid is pH-dependable and increases with decreasing pH [31].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fungus Aspergillus niger Processes Exogenous Zinc Nanoparticles into a Biogenic Oxalate Mineral

Šebesta

Urík

Bujdoš

et al. 2020

JoF

Self Cite

View full text Add to dashboard Cite

Zinc oxide nanoparticles (ZnO NPs) belong to the most widely used nanoparticles in both commercial products and industrial applications. Hence, they are frequently released into the environment. Soil fungi can affect the mobilization of zinc from ZnO NPs in soils, and thus they can heavily influence the mobility and bioavailability of zinc there. Therefore, ubiquitous soil fungus Aspergillus niger was selected as a test organism to evaluate the fungal interaction with ZnO NPs. As anticipated, the A. niger strain significantly affected the stability of particulate forms of ZnO due to the acidification of its environment. The influence of ZnO NPs on fungus was compared to the aqueous Zn cations and to bulk ZnO as well. Bulk ZnO had the least effect on fungal growth, while the response of A. niger to ZnO NPs was comparable with ionic zinc. Our results have shown that soil fungus can efficiently bioaccumulate Zn that was bioextracted from ZnO. Furthermore, it influences Zn bioavailability to plants by ZnO NPs transformation to stable biogenic minerals. Hence, a newly formed biogenic mineral phase of zinc oxalate was identified after the experiment with A. niger strain’s extracellular metabolites highlighting the fungal significance in zinc biogeochemistry.

show abstract

“…A. niger is well known for the high rate of extracellular metabolite production. Oxalic acid is the most produced of organic acids by the fungus when grown on Sabouraud growth media [30].…”

Section: Transformation Of Zno Nanoparticles By Fungal Extracellular mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Fungus Aspergillus niger Processes Exogenous Zinc Nanoparticles into a Biogenic Oxalate Mineral

Šebesta

Urík

Bujdoš

et al. 2020

JoF

Self Cite

View full text Add to dashboard Cite

show abstract

“…Furthermore, the two-step bioextraction method is more advantageous, since the direct exposure to extracted manganese through the one-step method adversely affected the fungal growth (Figure 2). Still, in the case that the fungal growth was not affected, the extraction performance of the two-step method under both dynamic and static conditions tends to be similar [14]. Nevertheless, the indirect exposure of manganese phases to fungal metabolites via the two-step method is most likely the main reason why the experimental methods of other authors outperformed our extraction efficiency.…”

Section: Discussionmentioning

confidence: 73%

“…The biosynthesis of manganese oxides in soils and sediments contributes to the formation of geochemical barriers, the high sorption and redox capacity of which can significantly decrease the mobility of potentially toxic elements in the environment [11]. Since the stability of manganese oxides is essential for limiting the spread of contamination, the microbially induced biodeterioration of these phases [2] should be studied in great detail, and carefully monitored in soils, especially in regard to the activity of various geoactive agents of biological origin [12][13][14]. First, however, controlled laboratory-scale experiments are required for a better understanding of the processes leading to the manganese oxides' deterioration.…”

Section: Introductionmentioning

confidence: 99%

Bioleaching of Manganese Oxides at Different Oxidation States by Filamentous Fungus Aspergillus niger

Farkas

Bujdoš

Polák

et al. 2021

JoF

Self Cite

View full text Add to dashboard Cite

This work aimed to examine the bioleaching of manganese oxides at various oxidation states (MnO, MnO·Mn2O3, Mn2O3 and MnO2) by a strain of the filamentous fungus Aspergillus niger, a frequent soil representative. Our results showed that the fungus effectively disintegrated the crystal structure of selected mineral manganese phases. Thereby, during a 31-day static incubation of oxides in the presence of fungus, manganese was bioextracted into the culture medium and, in some cases, transformed into a new biogenic mineral. The latter resulted from the precipitation of extracted manganese with biogenic oxalate. The Mn(II,III)-oxide was the most susceptible to fungal biodeterioration, and up to 26% of the manganese content in oxide was extracted by the fungus into the medium. The detected variabilities in biogenic oxalate and gluconate accumulation in the medium are also discussed regarding the fungal sensitivity to manganese. These suggest an alternative pathway of manganese oxides’ biodeterioration via a reductive dissolution. There, the oxalate metabolites are consumed as the reductive agents. Our results highlight the significance of fungal activity in manganese mobilization and transformation. The soil fungi should be considered an important geoactive agent that affects the stability of natural geochemical barriers.

show abstract

The Recent Strategies Employed in Chemical Analysis of Contaminated Waters, Sediments and Soils as a Part of the Remediation Process: Extraction

Nemček

Hagarová

2021

Environmental and Microbial Biotechnology

View full text Add to dashboard Cite

Chemical mimicking of bio-assisted aluminium extraction by Aspergillus niger’s exometabolites

Cited by 12 publications

References 46 publications

Fungus Aspergillus niger Processes Exogenous Zinc Nanoparticles into a Biogenic Oxalate Mineral

Fungus Aspergillus niger Processes Exogenous Zinc Nanoparticles into a Biogenic Oxalate Mineral

Bioleaching of Manganese Oxides at Different Oxidation States by Filamentous Fungus Aspergillus niger

The Recent Strategies Employed in Chemical Analysis of Contaminated Waters, Sediments and Soils as a Part of the Remediation Process: Extraction

Contact Info

Product

Resources

About