Microbial Leaching (Bioleaching, Biomining

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.

Microbial Leaching of Uranium Ore IntechOpen

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.

Microbial Leaching of Uranium Ore ResearchGate

Download Citation Microbial Leaching of Uranium Ore The rapid growth demand for power follows that nuclear power industry has led to progressive exhaustion of high grade reserves of uranium

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

Bioleaching: Introduction, Methods, Application, Copper

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

Bacterial leaching of uranium ore from Figueira—PR, Brazil

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.

I. Factors influencing the application of bacterial

Jan 09, 2017· In the bacterial leaching of Elliot Lake ore, the over-all extraction rate that can be obtained is determined mainly by the particle size of the leach feed. On sizes coarser than 4 mesh, where 32 weeks or more is required to reach a uranium extraction of 70%, the extraction rate is related mainly to the rate at which the solutions penetrate the particle to depth. Since this relationship is

Bioleaching of low-grade uranium ore using

Mar 09, 2010· 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.

Effect of particle size on uranium bioleaching in column

This study evaluated the effectiveness of ore particle size on column bioleaching from low-grade uranium ore using an indigenous Acidithiobacillus ferrooxidans, isolated from local uranium ore.The uranium content was 0.033% by weight and ore particle size was crushed to

I. Factors influencing the application of bacterial

In the bacterial leaching of Elliot Lake ore, the over-all extraction rate that can be obtained is determined mainly by the particle size of the leach feed. On sizes coarser than 4 mesh, where 32 weeks or more is required to reach a uranium extraction of 70%, the extraction rate is related mainly to the rate at which the solutions penetrate the particle to depth. Since this relationship is

Bioleaching of low-grade uranium ore using

Mar 09, 2010· 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

Microbial Leaching of Uranium Ore IntechOpen

Microbial Leaching of Uranium Ore, Nuclear Power Deployment, Operation and Sustainability, Pavel Tsvetkov, IntechOpen, DOI: 10.5772/17941. Available from:

REVIEW Microbial Leaching of Uranium Ore

iron that may effect uranium's 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.

Bacterial leaching of uranium ore from Figueira—PR, Brazil

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.

Bacterial leaching of ores and other materials

So the leaching of uranium ores which contain pyrite as an iron source is most economical. Otherwise one has to add pyrite or another source of iron. The technical set-up of uranium ore leaching may be the dump method, but sometimes a variation of this, so-called heap or basin leaching is applied. The ore is set up in basins.

Microbial Leaching of Uranium from Low Grade Ore and Waste

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 uranium's recovery from low grade ores and waste samples Penicillium purpurogenium and Pseudomonas fluorescens SHA 281 were exhibited a

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

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.

Uranium Bioleaching MINTEK MINTEK

It was found that the low temperature of the bioleaching process, which was restricted to 35 °C, resulted in such slow uranium extraction rates that the process could not compete with the conventional atmospheric acid-ferric leach process, despite the advantages that it held: pyrite oxidation provided acid and ferric sulfate, and liberated

OCCURRENCE OF BACTERIAL LEACHING IN URANIUM

OCCURRENCE OF BACTERIAL LEACHING IN URANIUM MINE EFFLUENTS, ORE TREATMENT UNIT, CALDAS, MG, BRAZIL Heliana.(A.(F.(Nascimento a*,(M.(B.(Campos ,S. Rodgherb,C.V. Roquea

8 Microbial Leaching of Metals

leaching operations were the height of the heap, particle size, initial ore washing with acid, and temperature control to about 50°C (SALKIELD, 1987). Another critical factor was the supply of water for the leaching heaps.Al-though usually acidic mine waters were used for ore

Uranium Acid Leaching Metallurgist & Mineral Processing

Mechanism of Uranium Leaching: Uranium leaching with sulphuric acid is a complex process governed by stone dissolution, and the oxidation of uranium.It is controlled by surface etching, diffusion, and mass transfer within the ore. The physical parameters are in turn controlled by the physical properties of ore, and the ore size.

bio leaching

Jan 15, 2015· The leach liquid collected at the bottom of the ore used for metal extraction. Heap leaching In heap leaching ore is arranged in heap and goes through the same procedure as in slope leaching. The aqueous solution containing microorganism works on the heap of ore and produces the leach liquor. The leach liquor is used for metal recovery. 13.

OCCURRENCE OF BACTERIAL LEACHING IN URANIUM

OCCURRENCE OF BACTERIAL LEACHING IN URANIUM MINE EFFLUENTS, ORE TREATMENT UNIT, CALDAS, MG, BRAZIL Heliana.(A.(F.(Nascimento a*,(M.(B.(Campos ,S. Rodgherb,C.V. Roquea

8 Microbial Leaching of Metals

leaching operations were the height of the heap, particle size, initial ore washing with acid, and temperature control to about 50°C (SALKIELD, 1987). Another critical factor was the supply of water for the leaching heaps.Al-though usually acidic mine waters were used for ore

Uranium Acid Leaching Metallurgist & Mineral Processing

Mechanism of Uranium Leaching: Uranium leaching with sulphuric acid is a complex process governed by stone dissolution, and the oxidation of uranium.It is controlled by surface etching, diffusion, and mass transfer within the ore. The physical parameters are in turn controlled by the physical properties of ore, and the ore size.

bio leaching

Jan 15, 2015· The leach liquid collected at the bottom of the ore used for metal extraction. Heap leaching In heap leaching ore is arranged in heap and goes through the same procedure as in slope leaching. The aqueous solution containing microorganism works on the heap of ore and produces the leach liquor. The leach liquor is used for metal recovery. 13.

Producing Copper Nature's Way: Bioleaching

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

Continued Multicolumns Bioleaching for Low Grade Uranium

Bioleaching has lots of advantages compared with traditional heap leaching. In industry, bioleaching of uranium is still facing many problems such as site space, high cost of production, and limited industrial facilities. In this paper, a continued column bioleaching system has been established for leaching a certain uranium ore which contains high fluoride. The analysis of stone

Enhanced uranium bioleaching high-fluorine and low-sulfur

Muñoz JA, González F, Blázquez ML, Ballester A (1995) A study of the bioleaching of a Spanish uranium ore. Part I: a review of the bacterial leaching in the treatment of uranium ores. Hydrometallurgy 38:39–57 CrossRef Google Scholar

Column Bioleaching Experiment of Low Grade Uranium Ore

Abstract: Xiangshan uranium deposit is the largest volcanic rock type uranium ore in China. Great number of low grade uranium ore (U 0.03%) was stacked in the tailings dam as a waste rock in more than 50 years of exploitation, resulted in uranium resources waste.Two group column bioleaching experiments (column AB) were carried on in order to investigate uranium recovery effect by microbial

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

Bacterial Leaching of Radioactive Conglomerates

Bacteria of the Ferrobacillus-Thiobacillus group -will effectively leach pyrite bearing radioactive conglomerates in abandoned underground workings. Uranium and rare earths can be produced from these ores at a cost comparable to conventional methods, operating solely by bacterial leaching. As an addition to an operating nine, costs can be quite low Thorium is also available for production from

BIOLEACHING OF URANIUM PDF

May 23, 2019· A 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.

A comparison of the uranium recovery from low-grade ore by

A comparison of the uranium recovery from low-grade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 250–1100 mg kg-1 U. Soils of Poland contain average amounts of U of 1.6 mg kg-1 (lowland) and up to >10 mg kg-1 in the mountain soils (Sudety Mountains).

Bioleaching

Apr 30, 2015· Uranium leaching is an indirect process When T.ferrooxidants are involved in uranium extraction, they do not directly attack on ore but on the iron oxidants. The pyrite reaction is used for the initial production of Fe Reaction; 2FeS+H2O+7 ½[O2] Fe2[SO4]3+ H2SO4 18.

Bacterial Leaching of Elliot Lake Uranium Ore

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 stone describes some of the laboratory techniques used to investigate the characteristics of the bacteria, and to utilize their properties in uranium leaching.

Bacterial Leaching of Radioactive Conglomerates

Bacteria of the Ferrobacillus-Thiobacillus group -will effectively leach pyrite bearing radioactive conglomerates in abandoned underground workings. Uranium and rare earths can be produced from these ores at a cost comparable to conventional methods, operating solely by bacterial leaching. As an addition to an operating nine, costs can be quite low Thorium is also available for production from

BIOLEACHING OF URANIUM PDF

May 23, 2019· A 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.

A comparison of the uranium recovery from low-grade ore by

A comparison of the uranium recovery from low-grade ore by bioleaching and acid leaching 137 Uranium ores in Poland contain about 250–1100 mg kg-1 U. Soils of Poland contain average amounts of U of 1.6 mg kg-1 (lowland) and up to >10 mg kg-1 in the mountain soils (Sudety Mountains).

Bioleaching

Apr 30, 2015· Uranium leaching is an indirect process When T.ferrooxidants are involved in uranium extraction, they do not directly attack on ore but on the iron oxidants. The pyrite reaction is used for the initial production of Fe Reaction; 2FeS+H2O+7 ½[O2] Fe2[SO4]3+ H2SO4 18.

Bacterial Leaching of Elliot Lake Uranium Ore

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 stone describes some of the laboratory techniques used to investigate the characteristics of the bacteria, and to utilize their properties in uranium leaching.

Examples of Leaching Microbiology

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.

Methods of Metal Recovery by Microorganisms (2 Methods)

In microbial leaching (bioleaching), metals can be extracted from large quantities of low grade ores. Although recovery of metals (e.g. copper) from the drainage water of mines has been known for centuries, the involvement of microbes in this process was recognized about 40 years ago. (FeS 2) within the uranium ore. For optimal extraction

A study of the bioleaching of a Spanish uranium ore. Part

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-organisms do not attack the uranium ore

Heap leaching Wikipedia

Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from ore using a series of stone reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the

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)

IN SITU LEACHING OF URANIUM

A. GEOLOGY OF POTENTIAL URANIUM LEACH MINING SITES There is some degree of uranium mineralization in most tertiary and older sedimentary rocks of the western and southwestern United States. However, the principal regions of potential uranium recovery by in-situ leach mining are the Wyoming Basins, the Colorado Plateau, and the Gulf

A study of the bioleaching of a Spanish uranium ore. Part

Read "A study of the bioleaching of a Spanish uranium ore. Part I: A review of the bacterial leaching in the treatment of uranium ores, Hydrometallurgy" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

Enhance Column Bioleaching of Uranium Embedded in

The column stone leaching and bioleaching methods recovery of uranium from one uranium ore containing brannerite under the some conditons were investigated. The brannerite ore sample taken from one uranium mine in southern China, the ore particle size was crushed to -5mm, the uranium content is 0.281%. The leaching duration lasted 120 days, the acid consumption rate were 7.82% and 7.79% by

Microbial Leaching YouTube

Jun 10, 2013· One more ore processing Duration: microbial ore leaching x264 Duration: 12:30. Uranium ONE mining and extraction.mp4 Duration: 1:48. Mike Shahrokni Recommended for you.