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microrobial mining of uranium

    Microbial Leaching of Uranium Ore - IntechOpen

    Microbial Leaching of Uranium Ore 293 waste materials. The waste materials (low grad e black Schist) consisted of 0.05% of uranium and 0.5 to 7% of carbonate. Sampling showed the microorganisms aerobic and anaerobic were present till 1.5 to 2 meter of surface depth and more than 99% of Thiobacillus ferrooxidans were present within this depth.

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    microrobial mining of uranium - greenrevolution.org

    Prokaryotic microorganisms in uranium mining waste piles and their5.10 Мб. Canadian Journal of Microbiology 46, 1012-1020. Kalinowski BE, Oskarsson A, Albinsson Y, Arlinger J, Ödegaard-Jensen A, Andlid T, Pedersen K (2004) Microbial leaching of uranium and other trace elements from shale mine tailings at Ranstad.

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    Uranium Biomineralization as a Result of Bacterial ...

    Uranium contamination is an environmental concern at the Department of Energy's Field Research Center in Oak Ridge, Tennessee. In this study, we investigated whether phosphate biomineralization, or the aerobic precipitation of U(VI)-phosphate phases facilitated by the enzymatic activities of microorganisms, offers an alternative to the more extensively studied

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    (PDF) Microbial Diversity in Uranium Mining-Impacted Soils ...

    Microbial Diversity in Uranium Mining-Impacted Soils 97 Efforts to amplify additional bacterial PCR products from Table 1 X-ray fluorescence spectroscopic analysis of major and trace elements of soil samples collected from the Edgemont and North Cave Edgemont soil were unsuccessful despite variation of Hills mine sites several parameters (e.g ...

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    Uranium bioremediation using microbial for mitigating its ...

    Many species of bacteria possess the ability to bring about this reduction, including sulfate reducing and Fe (III) reducing bacteria (6). Bacteria belonging to the genus Geobacter, Desulfosporosinus, Closteridium have also been found to remove toxic uranium from water sources (7,8). The table below provides information on some of the microbial ...

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    4 Uranium Mining, Processing, and Reclamation Uranium ...

    URANIUM MINING METHODS. Based on the current understanding of uranium deposits in the Commonwealth of Virginia, extraction of uranium ore would use open-pit mining, or underground mining, or a combination of both ().These general terms incorporate a large variety of design possibilities—there are as many methods of mining uranium as there are orebody sizes,

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    Microbial Leaching (Bioleaching, Biomining ...

    In situ uranium leaching is gaining vast acceptance. However, uranium leaching from ore on a large scale is widely practiced in the USA, South Africa, Canada and India. Insoluble tetravalent uranium is oxidized with a hot H 2 SO 4 /Fe 3+ solution to make soluble hexavalent uranium sulfate at pH 1.5-3.5 and temperature 35°C (Crueger and Crueger ...

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    For uranium cleanup ... bacteria?

    May 19, 2006  Courtesy of the U.S. Department of Energy. Researchers at Stanford and Oak Ridge National Laboratory are using bacteria to reduce uranium to safe levels at sites such as this one in Oak Ridge ...

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    MICROBIAL MINING - Spaceship Earth

    MICROBIAL MINING. The central role of bacteria in the leaching of copper from low-grade ore long went unrecognised. The minerals industry now stands to gain from the application of novel methods of microbiological technology . by Corale L. Brierley (Published in: Scientific American, 247, 42 - 50, 1982, here without accompanying figures)

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    Microbial Leaching of Uranium Ore - IntechOpen

    Microbial Leaching of Uranium Ore 293 waste materials. The waste materials (low grad e black Schist) consisted of 0.05% of uranium and 0.5 to 7% of carbonate. Sampling showed the microorganisms aerobic and anaerobic were present till 1.5 to 2 meter of surface depth and more than 99% of Thiobacillus ferrooxidans were present within this depth.

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    Microbial diversity in uranium mining-impacted soils as ...

    Microbial diversity was characterized in mining-impacted soils collected from two abandoned uranium mine sites, the Edgemont and the North Cave Hills, South Dakota, using a high-density 16S microarray (PhyloChip) and clone libraries. Characterization of the elemental compositions of soils by X-ray fluorescence spectroscopy revealed higher metal ...

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    Microbial transformations of uranium in wastes and ...

    Microbial transformations of uranium in wastes and implication on its mobility Arokiasamy J. Francis Environmental Sciences Department, Brookhaven National Laboratory, Upton, New York 11973 USA Abstract. Uranium exists in several chemical forms in mining and mill tailings and in nuclear and weapons production wastes. Under appropriate conditions,

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    Uranium Bioremediation in Contaminated Groundwater ...

    Oct 02, 2015  Bacterial Community Succession During in situ Uranium Bioremediation: Spatial Similarities Along Controlled Flow Paths. Journal Name: ISME Journal. doi: 10.1038/ismej.2008.123. [3] Francis, A.J. (1998). Bioremediation of Uranium Contaminated Soils and Wastes. In Uranium Mining and Hydrogeology II, Freiberg (DE), 09/15/1998--09/17/1998.

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    Microbial interactions with uranium: Towards an effective ...

    Nov 12, 2020  3. Microbial interactions with uranium. Biological agents such as bacteria, fungi or plants interact with the uranium in a variety of ways to protect and survive in the environment containing naturally abundant uranium or contaminated sites (Merroun and Selenska-Pobell, 2008).A wide range of organisms has been identified and characterized from mining and

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    MICROBIAL MINING - Spaceship Earth

    MICROBIAL MINING. The central role of bacteria in the leaching of copper from low-grade ore long went unrecognised. The minerals industry now stands to gain from the application of novel methods of microbiological technology . by Corale L. Brierley (Published in: Scientific American, 247, 42 - 50, 1982, here without accompanying figures)

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    The Impact of Uranium Mine Contamination of Soils on Plant ...

    May 14, 2014  As part of a tier 3 risk assessment performed for a uranium mining area, the ability of soils with different degrees of metal contamination to degrade organic matter was assessed using litter bags filled with leaves of Quercus robur, Pinus pinaster, Salix atrocinerea, or a mixture of the three species. Litter bags were exposed at different sites within the mine area

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    Remediation technology for the uranium contaminated ...

    Jan 01, 2012  Uranium contamination and damage Uranium causes soil and water radioactive contamination mainly through mining uranium, nuclear research, nuclear fuel, depleted uranium weapons, war and other means. Because of its high density and low cost, DU is extensively used in the military, industrial and medical fields.

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    Scientists discover a bacterium that "breathes" uranium ...

    Jun 15, 2015  A strain of bacteria that "breathes" uranium may hold the key to cleaning up polluted groundwater at sites where uranium ore was processed to make nuclear weapons.

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    (PDF) Microbial Diversity in Uranium Mining-Impacted Soils ...

    Microbial Diversity in Uranium Mining-Impacted Soils 97 Efforts to amplify additional bacterial PCR products from Table 1 X-ray fluorescence spectroscopic analysis of major and trace elements of soil samples collected from the Edgemont and North Cave Edgemont soil were unsuccessful despite variation of Hills mine sites several parameters (e.g ...

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    Culture-independent molecular analysis of bacterial ...

    mine activities. Keywords Uranium mines 16S rRNA gene Bacterial community ARDRA Introduction Dispersion and migration of uranium (U) and other toxic metals and radionuclides from uranium mines due to mining operations and waste piling is a serious environ-mental concern to all uranium producing states (Foster et al. 2008; Islam et al. 2011 ...

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    For uranium cleanup ... bacteria?

    May 19, 2006  Courtesy of the U.S. Department of Energy. Researchers at Stanford and Oak Ridge National Laboratory are using bacteria to reduce uranium to safe levels at sites such as this one in Oak Ridge ...

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    Influence of Uranium on Bacterial Communities: A ...

    Uranium speciation in the soils was further investigated by X-ray Absorption Spectroscopy (XAS) analysis. Spectra of Vénachat and Villard U-07 soil samples as well as yellow particles extracted from Villard soil were recorded at the U L III-edge (Figure 3).The position of the absorption edge at ∼17.177 keV is characteristic of the U(VI) oxidation state , and the shoulder at 17.188 keV in ...

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    What is biomining? American Geosciences Institute

    Biomining is mineral processing with microbes. Biomining is the process of using microorganisms (microbes) to extract metals of economic interest from rock ores or mine waste. Biomining techniques may also be used to clean up sites that have been polluted with metals. Valuable metals are commonly bound up in solid minerals. Some microbes can oxidize those

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    Microbial transformations of uranium in wastes and ...

    Microbial transformations of uranium in wastes and implication on its mobility Arokiasamy J. Francis Environmental Sciences Department, Brookhaven National Laboratory, Upton, New York 11973 USA Abstract. Uranium exists in several chemical forms in mining and mill tailings and in nuclear and weapons production wastes. Under appropriate conditions,

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    Uranium bioremediation using microbial for mitigating its ...

    Many species of bacteria possess the ability to bring about this reduction, including sulfate reducing and Fe (III) reducing bacteria (6). Bacteria belonging to the genus Geobacter, Desulfosporosinus, Closteridium have also been found to remove toxic uranium from water sources (7,8). The table below provides information on some of the microbial ...

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    Microbial communities in low permeability, high pH uranium ...

    permeability, high pH uranium mine tailings. Introduction Mining and processing of uranium are associated with the generation of large quantities of residual materials containing heavy metals (Palmisano and Hazen 2003). Micro-organisms have evolved mechanisms that enable them to expand their habitat range so as to grow in a

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    Uranium Mining and Extraction from Ore

    Fig. 2: Process scheme for uranium mining and processing to produce useable uranium product, including chemical equations for acid and alkaline leaching process. Uranium Extraction Uranium leaching is the process by which the uranium is extracted from the raw ore by reacting the material with acid or base.

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    (PDF) Microbial Extraction of Uranium from Ores

    The presence of microorganisms in leaching operations has been found to be beneficial in catalysing the uranium dissolution process (Brierley, 1997; Brierley and Brierley, 1999).

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    Microbial uranium immobilization independent of nitrate ...

    Enrichments from U‐contaminated sediments demonstrated nearly complete reduction of uranium with very little loss of nitrate from pH 5.7–6.2 using methanol or glycerol as a carbon source. Bacterial 16S rRNA genes were amplified from uranium‐reducing enrichments (pH 5.7–6.2) and sequenced.

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    Uranium-Respiring Bacteria May Have Formed Mining ...

    Uranium, like other heavy metals, is formed in supernova explosions. There are many steps from there to the deposits we mine on Earth, however, and it

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    Uranium mining by country - Wikipedia

    Namibia produces uranium from three of the world's largest open pit uranium mines.The China National Nuclear Corporation-owned Rössing mine produced 2,478 tonnes (5,463,000 lb) of U 3 O 8 in 2018. The China General Nuclear Power Group-owned Husab Mine produced 3,571 tonnes (7,873,000 lb) of U 3 O 8 in 2018.. The Langer Heinrich calcrete uranium deposit was

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    Microbial Mining

    Microbial mining is such an important part of modern day mining processes that it has entered the cultural zeitgeist via the video game Metal Gear Solid: Phantom Pain, where a large story element is a uranium-enriching microbe called Metal Archaea. This website was made as an assignment as part of a MChem degree from Bangor University.

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    Uranium Bioremediation in Contaminated Groundwater ...

    Oct 02, 2015  Bacterial Community Succession During in situ Uranium Bioremediation: Spatial Similarities Along Controlled Flow Paths. Journal Name: ISME Journal. doi: 10.1038/ismej.2008.123. [3] Francis, A.J. (1998). Bioremediation of Uranium Contaminated Soils and Wastes. In Uranium Mining and Hydrogeology II, Freiberg (DE), 09/15/1998--09/17/1998.

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    Microbial Populations Stimulated for Hexavalent Uranium ...

    Uranium-contaminated sediment and water collected from an inactive uranium mine were incubated anaer-obically with organic substrates. Stimulated microbial populations removed U almost entirely from solution within 1 month. X-ray absorption near-edge structure analysis showed that U(VI) was reduced to U(IV) during the incubation.

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    IN SITU LEACHING OF URANIUM

    other types of uranium mining. Prior to the operation of an in-situ leach mining facility it is necessary to collect data on: (1) geology, (2) hydrology, and (3) in-situ leaching mining impacts. A portion of the principal items considered under each of these headings is given below.

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    MICROBIOLOGY OF A RECLAIMED URANIUM MINE,

    microbial communities in a reclaimed uranium mine at Laguna Pueblo, the Jackpile Mine. Heavy metals are naturally present in many soils. Occasionally, with mining of these metals, the concentrations can increase in the surrounding environments when mining operation procedures are not in place or adhered to or if reclamation of the mine

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    Biomining: How microbes help to mine copper - BBC News

    Mar 21, 2012  Using bacteria can result in extracting as much as 90% of the total metal at a pit mine, instead of merely 60%, he adds. image caption Bioleaching is an alternative method to traditional mining ...

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