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Microbial Leaching of Uranium Ore - cdntechopen

2018-9-25  Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Azad University, Qaemshahr Branch Iran 1. Introduction This chapter is a review of the microbiological leaching of uranium ores. Microbiological leaching has been use as an alternative approach to conventional hydrometallurgical methods of uranium's extraction.

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Microbial Leaching of Uranium Ore - ResearchGate

The percolation leaching of a uranium ore in the presence of micro-organisms was carried out in semi-pilot experiments at different scales. ... microbial activity. The uranium-leaching efficiency ...

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Microbiological leaching of uranium ores SpringerLink

1999-11-1  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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Microbial Leaching of Uranium Ore IntechOpen

2011-9-9  Microbial Leaching of Uranium Ore, Nuclear Power - Deployment, Operation and Sustainability, Pavel Tsvetkov, IntechOpen, DOI: 10.5772/17941. Available from: Over 21,000 IntechOpen readers like this topic ...

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REVIEW Microbial Leaching of Uranium Ore

Vol. 21, No. 8 (2009) Microbial Leaching of Uranium Ore 5809. Harrison et al.9 reported the role of the iron oxidizing Acidithiobacillus ferrooxidans in leaching of uranium. The uranium ore was stacked in heaps, similar to dump leaching of low-grade copper ore and leached using an acidic ferric sulfate

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Microbial leaching of uranium and other trace elements ...

2004-10-1  Microbial leaching of uranium and other trace elements from shale mine tailings at Ranstad. ... despite the fact that the tailings are covered up and no longer are under the direct influence of weathering. Microbial mobilization of elements may occur at conditions other than those needed for chemical ... (nonleached uranium ore)

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Microbial Leaching of Uranium Ore - CORE Reader

Microbial Leaching of Uranium Ore - CORE Reader

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(PDF) Microbial Leaching of Uranium from Low Grade Ore

2016-8-25  PDF Uranium (U) is one of the strategic elements and essential for many applications as a fuel in nuclear power plants and nuclear weapons.... Find, read and cite all the research you need on ...

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Final Project Report on "Microbial Leaching of uranium ...

Final Project Report on "Microbial Leaching of uranium from Narwapahar ore" By K D Mehta, B D Pandey, B Nayak, Vinod Kumar, A K Upadhyay and Abhilash. Abstract. Uranium ore from Narwapahar Mines, UCIL contains 0.047% U 3 O 8 with some refractory minerals and high apatite (5%) results in a maximum 78% recovery through conventional processing at ...

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Microbial leaching - Online Biology Notes

2020-8-27  Although less uranium than copper is obtained by microbial leaching, the uranium process is more significant economically. Because a thousand tons of uranium ore must be handled to obtain one ton of uranium, in-situ microbial leaching is gaining greater acceptance, since it eliminates the expense of moving such vast amounts of material.

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Bacterial Leaching of a Carbonate Bearing Uranium Ore ...

But discovering a new ore body does not mean that mining will be feasible because several factors may influence the metal winning process, e.g. low amount of total ore, low concentration of valuable metal, large dissemination of ore.

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Bacterial leaching of waste uranium materials.

Uranium leaching is increased up to 20% while sulphuric acid consumption is simultaneously decreased by the addition of pyrite. Uranium concentrations in starting waste materials used for leaching were extremely low (0.0278 and 0.372% U) but about 60% recovery of uranium was obtained, with relatively low consumption of sulphuric acid.

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Bacterial Leaching in Uranium Mine Effluents at the Ore ...

[en] The condition for bacterial leaching (Acidithiobacillus spp.) in uranium ores is the presence of metallic sulphides such as associated pyrite (FeS 2), which occurs in the ore and waste rock piles of the Uranium Ore Treatment Unit (UTM), Minas Gerais State, Brazil.In the UTM area, water sampling was conducted at three points in the UTM interface environment, at two other points in the ...

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(PDF) Microbial Extraction of Uranium from Ores

65 Microbial Extract ion of Uranium from Ore s Parsonsite Pb 2 UO 2 (PO 4 ) 2 ⋅ 2H 2 O 26.1 Zaire Shoep (1923) Pitchblende UO 2 88.1 Many world wide Ring (1980), Agate (1983), Ketzinel

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BIOLEACHING OF URANIUM PDF - PDF Central

2020-8-28  Microbial leaching of uranium and other trace elements from shale mine tailings at Ranstad. A study of the bioleaching of a Spanish uranium ore. There was a problem providing the content you requested. A review of the bacterial leaching in the treatment of uranium ores. A study of the bioleaching of spanish uranium ore.

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Review on bioleaching of uranium from low-grade ore ...

2010-8-12  Olli H. Tuovinen, 1986: Acid leaching of uranium ore materials with microbial catalysis, Biotechnology and Bioengineering Symposium, 16, 65-72. S.A. Waksman, J. S. Joffe, 1922: Micro-organisms concerned with the oxidation of sulphur in soil. II. Acidithiobacillus thiooxidans, a new sulphur oxidising organism isolated from the soil. J. Bacteriol., 7(2)239-256.

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Microbial processing of apatite rich low grade Indian ...

2013-1-1  This ore in bench scale microbial leaching showed an appreciable uranium recovery of 96–98% in 40 days (Abhilash et al., 2012). On scaling the process to columns, the recovery was 58% in 40 days ( Abhilash et al., 2011 ), though lower, but avoided significant grinding cost of the material.

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Approaches to uranium dump processing by bioleaching ...

In addition, using microbial leaching there’s no need in further uranium ore grinding and that reduces costs to process ura-nium dumps. The work proposes a scheme for processing uranium dumps in the technological process. This technology will contribute to transforming the places for uranium waste storage into anthropogenic deposits.

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Bioleaching: Introduction, Methods, Application, Copper ...

2021-8-16  In situ microbial leaching is greater acceptance since it eliminates the expense of moving vast amounts of material. For instance thousand tons of uranium ore must be handled in other than bioleaching processes, to obtain one ton of uranium. This is an indirect leaching process since the microbial attack is not on uranium ore directly but on ...

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Microbes and mineral recovery: Bioleaching of copper,

2020-4-22  The leaching of sulfide minerals distinguishes bioleaching from conventional acid leaching. Bioleaching involves the use of microorganisms to catalyze the oxidation of iron sulfides to create ferric sulfate and sulfuric acid. Bioleaching is used today in commercial operations to process ores of copper, nickel, cobalt, zinc and uranium.

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Bacterial Leaching in Uranium Mine Effluents at the Ore ...

[en] The condition for bacterial leaching (Acidithiobacillus spp.) in uranium ores is the presence of metallic sulphides such as associated pyrite (FeS 2), which occurs in the ore and waste rock piles of the Uranium Ore Treatment Unit (UTM), Minas Gerais State, Brazil.In the UTM area, water sampling was conducted at three points in the UTM interface environment, at two other points in the ...

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Microbial Extraction of Uranium from Ores - [email protected]

CONTENTS 3.1 Introduction 3.2 Uranium Leaching Methodologies 3.2.1 Chemical Leaching 3.2.2 Bioleaching 3.3 Modes and Mechanism of Uranium Bioleaching 3.3.1 Direct Mechanism 3.3.2 Indirect Mechanism 3.3.3 Bioleaching by Heterotrophs 3.4 Factors Influencing Bioleaching 3.4.1 Mineralogy of the Ore 3.4.2 Microorganisms 3.4.3 Temperature 3.4.4 pH 3.4.5 Nutrients and Energy Source 3.4.6

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BIOLEACHING OF URANIUM PDF - PDF Central

2020-8-28  Microbial leaching of uranium and other trace elements from shale mine tailings at Ranstad. A study of the bioleaching of a Spanish uranium ore. There was a problem providing the content you requested. A review of the bacterial leaching in the treatment of uranium ores. A study of the bioleaching of spanish uranium ore.

More

Bacterial leaching of waste uranium materials. - Abstract ...

Uranium leaching is increased up to 20% while sulphuric acid consumption is simultaneously decreased by the addition of pyrite. Uranium concentrations in starting waste materials used for leaching were extremely low (0.0278 and 0.372% U) but about 60% recovery of uranium was obtained, with relatively low consumption of sulphuric acid.

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Study of Microorganism Trench-Leaching of a Chinese High ...

The microorganism trench-leaching process of a low-grade uranium ore with a high content of fluorine was experimentally studied through the technique of Real-time PCR by using the fluorine-tolerance bacteria of Retech-3 as the leaching-ore bacteria. It was found that the Retech-3 strains of fluorine-tolerance domestication grown well in a fluoride solution with concentration of 0.0~3.0 gL-1 ...

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Bioleaching: Introduction, Methods, Application, Copper ...

2021-8-16  In situ microbial leaching is greater acceptance since it eliminates the expense of moving vast amounts of material. For instance thousand tons of uranium ore must be handled in other than bioleaching processes, to obtain one ton of uranium. This is an indirect leaching process since the microbial attack is not on uranium ore directly but on ...

More

Review on bioleaching of uranium from low-grade ore

2010-8-12  Olli H. Tuovinen, 1986: Acid leaching of uranium ore materials with microbial catalysis, Biotechnology and Bioengineering Symposium, 16, 65-72. S.A. Waksman, J. S. Joffe, 1922: Micro-organisms concerned with the oxidation of sulphur in soil. II. Acidithiobacillus thiooxidans, a new sulphur oxidising organism isolated from the soil. J. Bacteriol., 7(2)239-256.

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Progress, Challenges, and Perspectives of Bioleaching for ...

2021-5-7  A summary of recent studies indicates that uranium ore is mainly treated by stacking, heap leaching, stope, and in situ biological leaching. Because uranium deposits contain rare earth elements, future bioleaching applications are likely to focus

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Microbes and mineral recovery: Bioleaching of copper,

2020-4-22  The leaching of sulfide minerals distinguishes bioleaching from conventional acid leaching. Bioleaching involves the use of microorganisms to catalyze the oxidation of iron sulfides to create ferric sulfate and sulfuric acid. Bioleaching is used today in commercial operations to process ores of copper, nickel, cobalt, zinc and uranium.

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Examples of Leaching Microbiology

2021-8-10  2. Uranium Leaching: This is an indirect process in which the microbes do not interact with uranium ore directly but act on iron oxidant. Ferric sulphate and sulphuric acid can be obtained by Thiobacillus ferrooxidans from the pyrite within the uranium ore. The reaction is given below: 2FeS 2 + H 2 O + 7.5O 2 → Fe 2 (SO 4) 3 + H 2 SO 4

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