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-
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.
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.
Microbial Mining Of Ore Crusher quarry mining and
Microbial Leaching of Uranium Ore ... Mining Engineering Department, Researches and Sciences Campus, Azad University, Tehran, ... microbial growth, ... Read more. Bacteria and mining - microbial extraction of ore ... Principle. Scientists first recognised importance of certain bacteria for the extraction of metals from ore in the 1950s.
Microbial characteristic and bacterial community
Jun 01, 2020 1. Introduction. Uranium contamination comes from uranium mining and the nuclear industry and is a threat to the environment and human health for its chemical toxicity and radioactivity (Yan and Luo, 2015).There could be some risks for uranium mill tailings, since the release of uranium will probably happen under long-term exposure to environmental effects, such as simulated acid rain
A new twist on uraniums origin story by CSU scientists
Jun 01, 2017 Mining implications. Abundance of this biogenic non-crystalline uranium has implications for environmental remediation of mining sites, and for mining practices in general. For instance, biogenic non-crystalline uranium is much more likely to oxidize into a
Speciation Distribution of Heavy Metals in Uranium Mining
Aug 13, 2019 This study investigated the influence of heavy metals on bacterial community structure in a uranium mine. Soils from three differently polluted ditches (Yangchang ditch, Zhongchang ditch, and Sulimutang ditche) were collected from Zoige County, Sichuan province, China. Soil physicochemical properties and heavy metal concentrations were measured.
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)
Microbiological treatment of uranium mine waters
Microbial Populations Stimulated for Hexavalent Uranium Reduction in Uranium Mine Sediment. Applied and Environmental Microbiology 2003, 69 (3) , ... In situ immobilization of heavy metals associated with uranium leach mines by bacterial sulfate reduction. Hydrometallurgy 1996, 43 (1-3) , ...
Microbial Links between Sulfate Reduction and Metal
metal ions, e.g., uranium, into their insoluble forms or indirectly by formation of metal suldes. This study evaluated in situ and biostimulated activity of SRB in groundwater-inuenced soils from a creek bank contaminated with heavy metals and radionuclides within the former uranium mining district of Ronneburg, Germany.
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,
Bacteria show promise in restoring aquifers used in
Jun 13, 2014 Research in UW laboratories has shown that stimulating growth of native bacteria could be a more effective way to remediate aquifers tapped by in-situ leach uranium mining
Bacterial diversity and composition of an alkaline uranium
The microbial diversity and biogeochemical potential associated with a northern Saskatchewan uranium mine water-tailings interface was examined using culture-dependent and -independent techniques. Morphologically-distinct colonies from uranium mine water-tailings and a reference lake (MC) obtained u
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 ...
Uranium Utolerant bacterial diversity from U ore
Uranium (U)-tolerant aerobic chemo-heterotrophic bacteria were isolated from the sub-surface soils of U-rich deposits in Domiasiat, North East India. The bacterial community explored at molecular level by amplified ribosomal DNA restriction analysis (ARDRA) resulted in 51 distinct phylotypes. Bacter
Microbial communities in low permeability high pH uranium
Mar 01, 2013 To assess microbial diversity and their potential to influence the geochemistry of uranium mine tailings using aerobic and anaerobic culture-based methods, in conjunction with next generation sequencing and clone library sequencing targeting two universal bacterial markers (the 16S rRNA and cpn60 genes). Growth assays revealed that 69% of the ...
In situ recovery of uranium The microbial influence
Therefore, this review focuses on the interactions between microorganisms and U and the possible effects this could have on ISR operations. Microorganisms may affect ISR in either a positive or negative way, e.g. assisting in U mobilization via the oxidation of U or immobilizing U by reducing it into an insoluble form.
Microbial interaction with and tolerance of radionuclides
Uranium is a naturally occurring radionuclide whose levels of contamination are associated with mining activi-ties, the weathering of uranium-containing minerals or accidental local release (Lloyd and Macaskie, 2000 Meinrath et al., 2003). The environmental impact of U is related to its chemistry (Burns 1999). Uranium occurs in
Mining bacterias appetite for toxic waste Researchers
Jul 14, 2003 Mining bacterias appetite for toxic waste / Researchers try to clean nuclear sites with microbes David Perlman , Chronicle Science Editor July 14, 2003 Updated Jan. 16, 2012 647 a.m.
Microbial Populations Stimulated for Hexavalent Uranium
Uranium-bearing wastes from nuclear weapons production and mining have generally been disposed of in near-surface environments.Dispersion of toxic aqueous uranium species through groundwater is of great environmental concern ().In situ stimulation of the growth of microorganisms capable of immobilizing dissolved uranium has been proposed as a potentially cost-effective remediation
Methods of Metal Recovery by Microorganisms 2 Methods
A combination of two bacteria Leptospirillum ferrooxidans and Thiobacillus organoparpus can effectively degrade pyrite (FeS 2) and chalcopyrite (CuFeS 2). The individual organisms alone are of no use in extracting metals. Pseudomonas aeruginosa can be employed in mining low grade uranium
Uranium Biomineralization as a Result of Bacterial
Uranium contamination is an environmental concern at the Department of Energys 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 ...
Microbial diversity in uranium miningimpacted 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 contamination including uranium at the
Microbial Diversity in Uranium MiningImpacted Soils
Diversity indices indicated that microbial communities at the North Cave Hills mine site were much more diverse than those at the Edgemont mine site. Introduction Uranium contamination in the soils, sediments, and ground water is a global problem. Activities associated with mining or processing of uranium for nuclear fuels and weapons have
Investigation of Microbial InSitu Remediation of
Mining activities caused primary uranium ores as well as sulphidic co-mineralisation to oxidize and shift to water soluble forms. The mines inventory of mobile uranium prior to flooding was estimated 2,000 tonnes. The K nigstein mine is situated in the deepest of
Removal and Recovery of Uranium using
Attempts were made to remove and to recover uranium present in nuclear fuel euents and mine tailings using microorganisms isolated from a Japanese uranium mine. Hundreds strains of microorganisms were screened to estab-lish which microorganisms removed the most uranium. Of the tested microorganism strains, an extremely high
Bioremediation of Uranium Contaminated Soils and
various microbial process conditions has resulted in the development of two treatment processes (i) stabilization of uranium and toxic metals with reduction in waste volume and (ii) removal and recovery of uranium and toxic metals from wastes and contaminated soils.
UraniumRespiring Bacteria May Have Formed Mining
Jun 01, 2017 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
UW Research Bacteria Show Promise in Restoring Aquifers
Jun 12, 2014 Bacteria Do the Job. At the Smith Ranch-Highland mine, Cameco, in the early 2000s, experimented with bioremediation stimulating native bacteria to fix the metals. These bacteria live in the uranium-rich strata and use uranium as an electron acceptor in their natural life cycles.
The History of Uranium Mining and the Navajo People
uranium-mining belt, was swept into the boom.1 Uranium was discovered in Cove, Ariz, and then elsewhere in the reserva-tion.18 Eventually, 4 centers of mining and milling operated on reservation land near Shiprock, NM (including the Carrizo Moun-tains, near Cove), in Monument Valley, Utah, and at Church Rock, NM, and Kayenta, Ariz (see Figure 1).
Mobilization of metals from uranium mine waste the role
Aug 15, 2010 Data from this study support siderophore production by bacteria that allowed mobilization of essential nutrients from the processed ore. However, the availability of potentially toxic metals like Ni and U may also be enhanced. Microbialpromoted mobilization could contribute to leaching of toxic metals in current and historic mining areas.
Bacteria Found Nearly 2 Miles Underground Live Science
Oct 19, 2006 Scientists found a gold mine of bacteria almost two miles beneath the Earths surface. The subterranean microorganisms, a division of Firmicutes bacteria, use radioactive uranium
The forgotten mine that built the atomic bomb BBC Future
Aug 03, 2020 The Shinkolobwe mine named after a kind of boiled apple that would leave a burn if squeezed was the source for nearly all of the uranium used
The long and controversial history of uranium mining in
Jul 14, 2015 Australia has about one third of the worlds known uranium resources and mining goes back to 1906, when a small amount of uranium ore was
Uranium in Drinkingwater WHO
However, uranium is known to occur at higher levels, frequently in smaller supplies. For example, uranium concentrations of up to 700 g/litre have been found in private supplies in Canada (Moss et al., 1983 Moss, 1985). A study in Finland examined a population receiving drinking-water containing uranium with a median concentration
Review Role of Microorganisms in Mining Generation
hydrological properties of the site. The type of mining operation, coal versus metal or uranium mining, may also have a large influence on ARD composition. However, recently, MEND, an industry government consortium on Mine Environment Neutral Drainage, in Canada conducted a nation-wide survey and compiled the results in a report (MEND, 1994).
Australias Uranium Mines World Nuclear Association
The Olympic Dam copper and uranium mine, with the town of Roxby Downs, is located 560 km north of Adelaide, near the opal mining centre of Andamooka. This is an arid part of Australia, receiving only an average of only 160 mm of rain per year, and that rather unreliably.
New Uranium Mining Projects South Australia
The Beverley uranium mine in South Australias far north was officially opened on 21 Feb. 2001 (ABC News 21 Feb. 2001) The Beverley Uranium Mine has now officially started commercial production. The mine is expected to operate at its full capacity of 1000 tonnes U3O8 per year by early 2001. (ABC News 3
Soil Bacterial Abundance and Diversity of Uranium
Apr 15, 2014 Recently, the reclamation is compromised due to the erosion of protective layers and the mine wastes continue to affect the area resulting in increased radiation and uranium concentration in mine area. Soil bacterial abundance in more radioactive environment of mine remains unchanged (on average ((8.52 5.1) x 10 8 cell g 1) compared to the ...
Reoxidation of Bioreduced Uranium Under Reducing
Feb 05, 2005 Uranium mining and processing for nuclear weapons and fuel have left thousands of sites with toxic levels of this actinide in soil and ground water. An emerging strategy for remediating such environments involves using organic carbon to promote microbially-mediated reduction and precipitation of insoluble U(IV) minerals.