OCCURRENCE OF BACTERIAL LEACHING IN URANIUM MINE EFFLUENTS ORE TREATMENT UNIT CALDAS MG BRAZIL Heliana.A.F.Nascimento aM.B.Campos S. RodgherbC.V. Roquea
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OCCURRENCE OF BACTERIAL LEACHING IN URANIUM MINE EFFLUENTS ORE TREATMENT UNIT CALDAS MG BRAZIL Heliana.A.F.Nascimento aM.B.Campos S. RodgherbC.V. Roquea
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Uranium may be leached to some extent in situ from the Blind River conglomerate uranium ores by using the products of bacterial activity from the bacterium Thiobacillus ferrooxidans This paper describes some of the laboratory techniques used to investigate the characteristics of the bacteria and to utilie their properties in uranium leaching.
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The principle of the method lies in leaching the uranium ore with ferric sul phate produced from the pyrite of the ore by bacterial action and which in turn can be regenerated by the bacteria Fig. 4. In other words during the process the micro
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Uranium U is one of the strategic elements and essential for many applications as a fuel in nuclear power plants and nuclear weapons. Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uraniums recovery from low grade ores and waste samples Penicillium purpurogenium and Pseudomonas fluorescens SHA 281 were exhibited a
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ACCEPTED MANUSCRIPT ACCEPTED MANUSCRIPT In Situ Recovery of Uranium Page 136 In situ recovery of uranium the microbial influence Carla M. Zammita Jo235l Bruggerb Gordon Southama and Frank Reithcd. a University of Queensland Earth Sciences St Lucia Brisbane Queensland 4072 Australia b Monash University School of Geosciences Clayton Victoria 3800 Australia
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May 23 2019nbsp018332A study of the bioleaching of a Spanish uranium ore. The sulfur weight is 0. In the next five days pH values decrease slowly compared with the former 5 days and reach uraniym 2. A review of the bacterial leaching in the treatment of uranium ores.
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192 8 Microbial Leaching of Metals 1 Introduction Future sustainable development requires measures to reduce the dependence on nonrenewable raw materials and the demand for primary resources. New resources for metals must be developed with the aid of novel tech
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Bioleaching does not recover the precious metals in the ore. The precious metals are often an important component in the profitability of the operation. The requirement for the smelter to produce acid for conventional leaching and to supplement bioleaching if the ore body is
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Methods of Metal Recovery by Microorganisms 2 Methods Bioleaching or microbial leaching FeS 2 within the uranium ore. For optimal extraction of uranium by bioleaching the ideal conditions are temperature 4550176C pH 1.5
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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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A comparison of the uranium recovery from lowgrade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 2501100 mg kg1 U. Soils of Poland contain average amounts of U of 1.6 mg kg1 lowland and up to gt10 mg kg
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Microbial leaching of copper has been widely used in the USA. Australia Canada Mexico South Africa and Japan. In the USA 200 tonnes of copper is recovered per day. Uranium Leaching Uranium leaching is more important than copper although less amount of uranium is obtained than copper.
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Microbial Leaching of Uranium Ore Hadi Hamidian Islamic Aad 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 uraniums extraction.
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Only 18 of the uranium was extracted without microbial activity. The uranium
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The objective of this work was to compare the bioleaching with the acid leaching of uranium under similar process conditions within 65 days. The low
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A bacterial leaching program was carried out in order to evaluate the potential of applying this process to leach uranium from the ore of Figueira
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This study evaluated the effectiveness of ore particle sie on column bioleaching from low
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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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It was found that the low temperature of the bioleaching process which was restricted to 35 176C resulted in such slow uranium extraction rates that the process could not compete with the conventional atmospheric acid
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Iron that may effect uraniums microbial leaching. Amongst the various parameters affecting the sufficiency of microbial leaching they just focused upon the afore
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A bacterial leaching program was carried out in order to evaluate the potential of applying this process to leach uranium from the ore of FigueiraPR Brail. The experiments were carried out in shake flasks column percolation laboratory and scmipilot scale and in heap leaching.
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Microbiological leaching has been used as an alternative approach to conventional hydrometallurgical methods of uranium extraction. In the microbiological leaching process iron
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This ore in bench scale microbial leaching showed an appreciable uranium recovery of 9698 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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A. ferrooxidans in leach solutions are found to be resistant and tolerant to larger concentrations of dissolved uranium. Increased bacterial tolerance to toxic uranium and the ore substrate can be achieved through preadaptation. Preadapted uranium
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