Microbial Leaching of Uranium Ore
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 uraniums extraction.
Microbial Leaching of Uranium Ore
Only 18% of the uranium was extracted without microbial activity. The uranium-leaching efficiency was not greatly affected by the addition of Fe2+ in the range of 5–9 g/l, and the leaching ...
Microbial Leaching of Uranium Ore - ResearchGate
Microbial Leaching of Uranium Ore. ... [Show full abstract] microbial activity. The uranium-leaching efficiency was not greatly affected by the addition of Fe2+ in the range of 5–9 g/l, and the ...
REVIEW Microbial Leaching of Uranium Ore
iron that may effect uraniums microbial leaching. Amongst the various parameters affecting the sufficiency of microbial leaching; they just focused upon the afore-mentioned parameters11. Brierley4, one of the distinguished researchers in microbial leaching, has done a case study on uranium ore (coffinite and uraninite) in Gerantez mine in Canada.
Microbial Leaching (Bioleaching, Biomining ...
Microbial leaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. For the last 10 centuries, microorganisms have assisted in the recovery of copper dissolved in drainage from water. Thus biomining has emerge …
Microbiological leaching of uranium ores | SpringerLink
Nov 01, 1999 · 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.
Bacterial leaching of ores and other materials
Bacterial leaching of a piece of ore with imbedded sulfidic ore minerals Technical application Bacterial disintegration of ores has been applied on a technical scale for many years, almost solely to leach copper and uranium.
Methods of Metal Recovery by Microorganisms (2 Methods)
Bioleaching of uranium is an indirect process since the microbial action is on the iron oxidant, and not directly on the uranium. The organism Thiobacillus ferrooxidans is capable of producing sulfuric acid and ferric sulfate from the pyrite (FeS 2 ) within the uranium ore.
Bioleaching of low-grade uranium ore using ...
Bioleaching of uranium was carried out with Turamdih ore sample procured from Uranium Corporation of India Limited, Jaduguda. The bacterial strain that was used in the leaching experiments was isolated from the Jaduguda mine water sample. Efficiency of ...
Bioleaching - Wikipedia
Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt
Bioleaching of a Spanish uranium ore | FEMS Microbiology ...
Jul 01, 1993 · The bioleaching of a low-grade uranium ore in shaker and columns using natural, pure and mixed cultures has been studied. Initially, a stone and microscopical characterization of the mineral was carried out. Orbital shaker experiments were performed to quickly obtain the best bacterial leaching conditions.
Bioleaching - An Alternate Uranium Ore Processing ...
Fisher J R. Bacterial leaching of Elliot Lake uranium ore. Can Min Metall Bull 1966; 59: 588-592 7. McCready R G L, Wadden D, Marchbank A. Nutrient requirements for the in-place leaching of uranium by Thiobacillus ferrooxidans.
Bacterial leaching of waste uranium materials.
The effect of ferrobacteria and thiobacteria on the leaching of waste uranium materials from which 70-80% of uranium was previously leached by classical stone hydrometallurgical procedure has been investigated. The bacteria used are found in the ore and the …
Effect of particle size on uranium bioleaching in column ...
Since the uranium dissolution in the bacteria-assisted leaching occurs through the surface area of the uranium ore granules, the pulp density and particle size determine the uranium mineral exposure, porosity, and effective specific surface area concentration of the mineral and thus affect the total leaching rate of mineral bioleaching ...
Examples of Leaching | Microbiology
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.
Microbial Leaching of Uranium from Low Grade Ore and …
uranium from low-grade ore was collected from Radoniow’s ‘small’ dump, Poland using the bioleaching of uranium achieved a maximum extraction of 75±15 % w/w after 55 days by Acidiothiobacillus bacteria. Compared with P. fluorescens SHA 281 and P. purpurogenium this fungus has four advantages in the leaching of uranium ore [7]. Firstly ...
Biomining - Wikipedia
Biomining is a technique of extracting metals from ores and other solid materials typically using prokaryotes or fungi. 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. It was discovered in the mid 1900s that microorganisms use metals in the cell.
Bacterial leaching of uranium ore from Figueira—PR, Brazil ...
Jul 01, 1993 · 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—PR, Brazil. The experiments were carried out in shake flasks, column percolation (laboratory and scmipilot scale) and in heap leaching.