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Potential use of native fungal strains for assisted uranium retention
(Biogeosfärsdynamik, MTM Research centre)ORCID iD: 0000-0002-1958-956X
Institute of Environmental Science, Jagiellonian University, Krakow, Poland.
Örebro University, School of Science and Technology.ORCID iD: 0000-0001-7845-6495
Örebro University, School of Science and Technology.ORCID iD: 0000-0002-2104-4593
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2015 (English)In: Minerals Engineering, ISSN 0892-6875, E-ISSN 1872-9444, Vol. 81, p. 173-178Article in journal (Refereed) Published
Abstract [en]

Uranium-stabilizing ligands can be useful complexing agents for uranium in aqueous solution. The discovery of novel ligand candidates for selective uranium capture in artificial and natural waters could provide scope for their use in water remediation and metal recovery from low- and high grade ores. In this study we used seven fungal strains, isolated from shale waste, to monitor the uranium retention capacity from an aqueous solution. After four weeks of incubation, suspensions containing the fungal strains were filtered, and up to 100% of the total uranium inventory was removed from a 10 mg L-1 solution. Approximately 70% of the total uranium removal is attributed to complexation and/or adsorption by particles in the malt extract and some 10% is adsorbed by the fungal biomass. The additional 20% uranium removed could be related to the excretion of fungal metabolites. From 58% to 90% of the uranium is removed within ten minutes. The formation of colloidal/particulate uranium is proposed to be controlled by organic ligands in the culture medium and organic ligands excreted by the fungi where phosphorus moieties seem to be important. Membrane fouling by the hydrocarbons is also suggested to contribute to a loss of uranium from the aqueous phase.

Place, publisher, year, edition, pages
2015. Vol. 81, p. 173-178
Keywords [en]
Biotechnology; Environmental; Pollution; Wasteprocessing
National Category
Chemical Sciences
Research subject
Chemistry
Identifiers
URN: urn:nbn:se:oru:diva-46072DOI: 10.1016/j.mineng.2015.04.003ISI: 000361253100023Scopus ID: 2-s2.0-84940440497OAI: oai:DiVA.org:oru-46072DiVA, id: diva2:860543
Note

Funding Agencies:

Academy of Economy, Science and Technology at Orebro University

Foundation of Polish Science

EU European Regional Development fund MPD/2009-3/5

Available from: 2015-10-12 Created: 2015-10-12 Last updated: 2017-12-01Bibliographically approved
In thesis
1. Utilization of waste materials for extraction of strategic metals: a biogeochemical approach
Open this publication in new window or tab >>Utilization of waste materials for extraction of strategic metals: a biogeochemical approach
2017 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Worldwide the modern society produces vast amounts of waste materials containing strategic and valuable metals. Some of them are of substantial economic or environmental significance if controlled recovery of metals can be performed or if uncontrolled release to the environment occurs.

By cultivating Agrostis capillaris on historical sulfidic mine waste the leachate composition can be altered and its volume reduced. In combination with additives such as bark compost and water works granules the concentration of several hazardous metals decreased significantly already after eight weeks. Limited actions can therefore be used to decrease the environmental impact from such waste.

Shale in general contains considerable amounts of strategic metals. If naturally occurring microorganisms are provided with a source of nutrients, increased mobilization of strategic metals can be obtained. By using wood chips as the nutrient source the mobilization of vanadium and uranium increased significantly. Highest mobilization efficiency was observed when the carbon source was put on top of the shale.

Analysis of strategic metals is often performed by argon plasma techniques such as ICP-QMS. However, the use of argon increases the analytical costs. If isotopic information is not needed and slightly higher uncertainties can be accepted, several strategic metals can successfully be quantified by the nitrogen plasma based MP AES. The analytical cost can then be cut with more than 99%.

Place, publisher, year, edition, pages
Örebro: Örebro University, 2017. p. 79
Series
Örebro Studies in Environmental Science, ISSN 1650-6278 ; 17
Keywords
biogeochemistry, ICP-QMS, MP AES, strategic metals, vanadium, uranium, mine waste, steel slag, shale residues
National Category
Environmental Sciences
Research subject
Enviromental Science
Identifiers
urn:nbn:se:oru:diva-53960 (URN)978-91-7529-174-1 (ISBN)
Public defence
2017-02-17, Örebro universitet, Hörsalen, Musikhögskolan, Fakultetsgatan 1, Örebro, 10:15 (Swedish)
Opponent
Supervisors
Available from: 2016-12-14 Created: 2016-12-14 Last updated: 2017-10-18Bibliographically approved

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Grandin, AnnaSjöberg, ViktorAllard, BertKarlsson, Stefan

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