microrobial mining of uranium
microrobial mining of uranium
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microrobial mining of uranium

microrobial mining of uranium - greenrevolution

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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Microbial Leaching of Uranium Ore

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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Uranium mining - Wikipedia

Uranium mining is the process of extraction of uranium ore from the ground. The worldwide production of uranium in 2019 amounted to 53,656 tonnes. Kazakhstan, Canada, and Australia were the top three uranium producers, respectively, and together account for 68% of world production. Other countries producing more than 1,000 tonnes per year included Namibia, Niger, Russia, Uzbekistan, the United States, and China. Nearly all of the world's mined uranium is used to power nuclear power plants.

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SOIL BACTERIAL ABUNDANCE AND DIVERSITY OF URANIUM

Keywords: bacterial abundance, bacterial diversity, community level physiological profile (CLPP), uranium mining Introduction The intensive uranium mining and milling performed over 40 years (up to 1990) in Bulgaria have caused significant pollution with uranium and other toxic metals and metalloids

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(PDF) Microbial Extraction of Uranium from Ores

87 Microbial Extrac tion of Uranium from O res. is limited to th at of 20 %, as with any further i ncrease the liquor becomes. too thick for ef cient gas tran sfer and the shear force induced by ...

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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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Bioreduction of Uranium Using Microbial Biomass

The most practical method financial is often the microbial treatment to remove uranium from waters, and here I will describe the basis in which that happens. [1] In Germany, there has been a lot of uranium mining and milling between 1952 and 1989 that produced around 231,000 tons of uranium.

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(PDF) Microbial Extraction of Uranium from Ores

87 Microbial Extrac tion of Uranium from O res. is limited to th at of 20 %, as with any further i ncrease the liquor becomes. too thick for ef cient gas tran sfer and the shear force induced by ...

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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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Microbiological leaching of uranium ores SpringerLink

Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uranium extraction. In the microbiological leaching process, iron-oxidizing bacteria oxidize pyritic phases to ferric iron and sulfuric acid, and uranium is solubilized from the ore due to sulfuric acid attack. If uranium in the ore material is in the reduced, tetravalent form (UIV ...

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Bacteria Found Nearly 2 Miles Underground Live Science

Oct 19, 2006  The subterranean microorganisms, a division of Firmicutes bacteria, use radioactive uranium to convert water molecules into useable energy. Uranium

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Uranium vi reduction and removal by high

Biological uranium reduction was investigated using bacteria isolated from a uranium mine in Limpopo, South Africa. Background uranium concentration in soil from the mine was determined to be 168 mg kg-1 much higher than the typical background uranium concentration in

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MICROBIAL MINING - Spaceship Earth

MICROBIAL MINING. The recovery of copper from the drainage water of mines was probably a widespread practice in the Mediterranean basin as early as 1000 B.C. Although such mining operations are difficult to document, it is known that the leaching of copper on a large scale was well established at the Rio Tinto mines in Spain by the 18th century.

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Uranium - Wikipedia

Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table.A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years.

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Biomining: metal recovery from ores with microorganisms

Biomining is an increasingly applied biotechnological procedure for processing of ores in the mining industry (biohydrometallurgy). Nowadays the production of copper from low-grade ores is the most important industrial application and a significant part of world copper production already originates from heap or dump/stockpile bioleaching.

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Biomining of metals: how to access and exploit natural ...

Recently, the possibility to bioremediate mining wastewaters using microbial fuel cell technology with acidophilic microorganisms has been explored (Ni et al., 2016). Fuel cells can be generated to discard many other inorganic and organic wastes, and the electricity generated is an extra bonus.

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Microbial Leaching of Uranium Ore - ResearchGate

Finally, an uranium ore from the Fe mine (Ciudad Rodrigo, Spain) was leached in the presence of bacteria using large columns (24 cm diameter and 275 cm height).

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Biomining - Wikipedia

Biomining is a technique of extracting metals from ores and other solid materials typically using prokaryotes, fungi or plants (phytoextraction also known as phytomining or biomining). These organisms secrete different organic compounds that chelate metals from the environment and bring it back to the cell where they are typically used to coordinate electrons.

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Microbial Reduction of Uranium in Mine Leachate by ...

Microbial Reduction of Uranium in Mine Leachate by Fermentative and Iron-Reducing Bacteria EPA Grant Number: R829515C008 Subproject: this is subproject number 008 , established and managed by the Center Director under grant R829515 (EPA does not fund or establish subprojects; EPA awards and manages the overall grant for this center).

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REVIEW Microbial Leaching of Uranium Ore

lurgy. Microbial leaching is the extraction of metals from their ores using microorganisms. Microbial technology offers an economic alter-native to the mining industry. This paper intends to render a general overview of the microbial leaching research activities all over the world. Key Words: Uranium, Microbial, Leaching, Nuclear, Pyrometal-

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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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Bioreduction of Uranium Using Microbial Biomass

The most practical method financial is often the microbial treatment to remove uranium from waters, and here I will describe the basis in which that happens. [1] In Germany, there has been a lot of uranium mining and milling between 1952 and 1989 that produced around 231,000 tons of uranium.

More

REVIEW Microbial Leaching of Uranium Ore

lurgy. Microbial leaching is the extraction of metals from their ores using microorganisms. Microbial technology offers an economic alter-native to the mining industry. This paper intends to render a general overview of the microbial leaching research activities all over the world. Key Words: Uranium, Microbial, Leaching, Nuclear, Pyrometal-

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Investigation of Microbial In-Situ Remediation of Uranium ...

Mining activities caused primary uranium ores as well as sulphidic co-mineralisation to oxidize and shift to water soluble forms. The mine’s inventory of mobile uranium prior to flooding was estimated 2,000 tonnes. The Königstein mine is situated in the deepest of

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Biomining - Wikipedia

Biomining is a technique of extracting metals from ores and other solid materials typically using prokaryotes, fungi or plants (phytoextraction also known as phytomining or biomining). These organisms secrete different organic compounds that chelate metals from the environment and bring it back to the cell where they are typically used to coordinate electrons.

More

Uranium - Wikipedia

Uranium is a chemical element with the symbol U and atomic number 92. It is a silvery-grey metal in the actinide series of the periodic table.A uranium atom has 92 protons and 92 electrons, of which 6 are valence electrons.Uranium is weakly radioactive because all isotopes of uranium are unstable; the half-lives of its naturally occurring isotopes range between 159,200 years and 4.5 billion years.

More

Uranium vi reduction and removal by high

Biological uranium reduction was investigated using bacteria isolated from a uranium mine in Limpopo, South Africa. Background uranium concentration in soil from the mine was determined to be 168 mg kg-1 much higher than the typical background uranium concentration in

More

Biomining: metal recovery from ores with microorganisms

Biomining is an increasingly applied biotechnological procedure for processing of ores in the mining industry (biohydrometallurgy). Nowadays the production of copper from low-grade ores is the most important industrial application and a significant part of world copper production already originates from heap or dump/stockpile bioleaching.

More

Microbial Sorption of Uranium Using Amycolatopsis sp. K47 ...

The increasing contamination of soils, sediments, and water with heavy metals through natural and industrial processes is a worldwide problem. Mining processes produce tons of material contaminated with radionuclides such as U and different heavy metals such as Cd, Ni, and Pb. U(VI) adsorbs strongly on bacteria, exhibiting pH-dependent adsorption behavior that is caused by a range of uranyl ...

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Biomining of metals: how to access and exploit natural ...

Recently, the possibility to bioremediate mining wastewaters using microbial fuel cell technology with acidophilic microorganisms has been explored (Ni et al., 2016). Fuel cells can be generated to discard many other inorganic and organic wastes, and the electricity generated is an extra bonus.

More

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 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 anaerobic U(VI) bioreduction ...

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Microbial Transformations of Uranium Complexed with ...

Microbial Transformations of Uranium Complexed with Organic and Inorganic Ligands 3 Biotransformations of uranium-organic and -inorganic complexes Although a wide variety of microorganisms are present in uranium mining wastes and in natural radioactive mineral deposits, the extent to which they regulate the

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

Microbial Diversity in Uranium Mining-Impacted Soils as Revealed by High-Density 16S Microarray and Clone Library. Larry Stetler. Gary Andersen. Rajesh Sani. Larry Stetler. Gary Andersen. Rajesh Sani. Related Papers. Microbial and Mineralogical Characterizations of Soils Collected from the Deep Biosphere of the Former Homestake Gold Mine, South ...

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