microorganisms capable of oxidizing iron ore

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Genomics, metagenomics and proteomics in biomining

The use of acidophilic, chemolithotrophic microorganisms capable of oxidizing iron and sulfur in industrial processes to recover metals from minerals containing copper, gold and uranium is a well established bio with distinctive advantages over traditional mining.

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16.6A: Microbial Ore Leaching - Biology LibreTexts

2021. 1. 3.  Microorganisms Capable of Ore Leaching. Bioleaching reactions industrially are performed by many bacterial species that can oxidize ferrous iron and sulfur. An example of such species is Acidithiobacillus ferroxidans. Some fungi species (Aspergillus niger and Penicillium simplicissimum) have also been shown to have the ability to dissolute heavy metals

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Iron Oxidizing Bacterium - an overview ScienceDirect Topics

The microorganisms involved include sulfur-oxidizing bacteria (e.g., Acidithiobacillus thiooxidans), iron- and sulfur-oxidizing bacteria (e.g., Acidithiobacillus ferrooxidans), and iron-oxidizing bacteria (e.g., Leptospirillum ferrooxidans).

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Microbial Bioremediation Microbiology [Master]

Microorganisms Capable of Ore Leaching Bioleaching reactions industrially are performed by many bacterial species that can oxidize ferrous iron and sulfur. An

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Bacterial leaching of ores and other materials

2018. 2. 27.  The principal bacterium in ore leaching is Thiobacillus ferrooxidans, which is capable of oxidizing ferrous iron as well as sulfur and sulfur compounds. But there are some other bacteria which may also be involved. For example the

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Microbiology (1999), 145, 5–13 Printed in Great Britain

T. ferrooxidans (an iron and sulphur oxidizer) and ‘ L . ferrooxidans ’ (an iron oxidizer) are capable of oxidizing an ore such as pyrite when growing in pure

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Sulfide mineral dissolution microbes: Community structure

2019. 1. 1.  It is generally concluded that the iron- and sulfur-oxidizing microorganisms in the bioleaching heaps are dominated by Acidithiobacillus and Leptospirillum, such as At. ferrooxidans, At. thiooxidans, At. caldus, L. ferrooxidans, L. ferriphilum, , .

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Teresa Laura LAVALLE National University of Comahue,

Among them, acidophilic and thermophilic microorganisms capable of oxidizing iron(II) or sulfur compounds are very important in ore-processing operations as they are able to enhance the ...

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microorganisms capable of oxidizing iron ore

Iron in Primeval Seas Rusted by Bacteria . 23, 2013 — Researchers from the University of Tübingen have been able to show for the first time how microorganisms contributed to the formation of the world's biggest iron ore deposits. The biggest known deposits ... or by the action of microaerophilic iron-oxidizing bacteria. But scientists are still debating at ...

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Characteristics and adaptability of iron- and sulfur

2005. 5. 6.  Microorganisms are used in large-scale heap or tank aeration processes for the commercial extraction of a variety of metals from their ores or concentrates. These include copper, cobalt, gold and, in the past, uranium. The metal solubilization processes are considered to be largely chemical with the microorganisms providing the chemicals and the space (exopolysaccharide layer)

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Genomics, metagenomics and proteomics in biomining

The use of acidophilic, chemolithotrophic microorganisms capable of oxidizing iron and sulfur in industrial processes to recover metals from minerals containing copper, gold and uranium is a well established bio with distinctive advantages over traditional mining.

More

An Overview: Application of Microorganisms in Bio-Mining of

2021. 2. 17.  iron oxidizing bacteria was recognized to have the potential to draw the energy indirectly from the sulfide minerals and to maintain iron in an oxidizing state for the oxidation of sulfide copper ore to solubilize copper in an extreme acidic environment.6, 14

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The shift of microbial communities and their roles in sulfur

2016. 10. 4.  Iron and sulfur are major energy sources for microorganisms in copper ore ... the relative abundances of microbial genera capable of oxidizing Fe ... Predominant iron-oxidizing bacteria ...

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Microbial Bioremediation Microbiology [Master]

The critical reaction is the oxidation of sulfide by ferric iron. The main role of the bacterial step is the regeneration of this reactant. Copper leaching has a very similar mechanism. Microorganisms Capable of Ore Leaching. Bioleaching reactions industrially are performed by many bacterial species that can oxidize ferrous iron and sulfur.

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Microbiology (1999), 145, 5–13 Printed in Great Britain

dominant iron-oxidizing bacteria in many commercial processes for the biooxidation of pyrite and related ores D. E. Rawlings,1 H. Tributsch2 and G. S. Hansford3 Author for correspondence: D. E ...

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Bacterial leaching of ores and other materials

2018. 2. 27.  The ore is set up in basins. The mode of operation is preferably a two stage leaching: the out-flowing liquor, in which the iron is largely in the ferrous form, is treated in an oxidation pond. In this the liquor is aerated to enable Thiobacillus ferrooxidans to oxidize ferrous iron and to obtain the ferric iron required for oxidation

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Methods of Metal Recovery by Microorganisms (2

2021. 7. 25.  The bacteria which are naturally associated with the rocks can lead to bioleaching by one of the following ways. 1. Direct action of bacteria on the ore to extract metal. 2. Bacteria produce certain substances such as sulfuric acid and ferric iron which extract the metal (indirect action).

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Iron ore - Wikipedia

2021. 7. 29.  Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the

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microorganisms capable of oxidizing iron ore

Iron in Primeval Seas Rusted by Bacteria . 23, 2013 — Researchers from the University of Tübingen have been able to show for the first time how microorganisms contributed to the formation of the world's biggest iron ore deposits. The biggest known deposits ... or by the action of microaerophilic iron-oxidizing bacteria. But scientists are still debating at ...

More

The shift of microbial communities and their roles in sulfur

2016. 10. 4.  Iron and sulfur are major energy sources for microorganisms in copper ore ... the relative abundances of microbial genera capable of oxidizing Fe ... Predominant iron-oxidizing bacteria ...

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Oxidation and Reduction of Iron by Acidophilic

2018. 6. 6.  Abstract. Redox reactions of iron in acidic environments are of economic and environmental significance, for example, for the leaching of metal ores and for the formation of acid mine drainage and acid sulfate soils. Until recently, research on microbial iron metabolism in acidic environments has mainly been focused on the role of aerobic, autotrophic ferrous iron‐oxidizing bacteria.

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Bacterial leaching of ores and other materials

2018. 2. 27.  As will be shown later, owing to its ability to oxidize ferrous iron, T. ferrooxidans is the principal agent of bacterial ore leaching at moderate temperatures. Thiobacilli and sulfidic minerals . Some Thiobacilli, especially T. ferrooxidans, are able to oxidize sulfide and some heavy metals -mainly iron

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Lake's Metal-Eating Microbes Could Solve Mystery of the

The microbes metabolize iron and grow at rates high enough to indicate their ancient equivalents were capable of depositing some of the world’s largest sedimentary iron ore deposits, known as banded iron formations. By oxidizing iron, these microorganisms likely helped shape the chemistry of the Earth over billions of years, ultimately ...

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Biobeneficiation of Iron Ores

2012. 1. 2.  Utilization of aerobic and anaerobic microorganisms in iron ore beneficiation is discussed. Microorganisms such as Paenibacillus polymyxa, Bacillus subtilis, Saccharomyces cerevisiae (yeast) and Desulfovibrio desulfuricans (SRB) are capable of significantly altering the surface chemical behavior of iron ore minerals such as hematite, corundum, calcite, quartz and apatite.

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Reduction of Iron(III) Ions at Elevated Pressure by

A composed mixed acidophilic, iron-oxidizing culture (FIGB) and a thermo-acidophilic enrichment culture (TK65) were used to evaluate microbial iron(III) reduction coupled to oxidation of reduced inorganic sulfur compounds (RISCs) under high pressure. Experiments were done in batch culture in high pressure vessels at 1 and 100 bar.

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Methods of Metal Recovery by Microorganisms (2

2021. 7. 25.  The bacteria which are naturally associated with the rocks can lead to bioleaching by one of the following ways. 1. Direct action of bacteria on the ore to extract metal. 2. Bacteria produce certain substances such as sulfuric acid and ferric iron which extract the metal (indirect action).

More

Iron ore - Wikipedia

2021. 7. 29.  Iron ores are rocks and minerals from which metallic iron can be economically extracted. The ores are usually rich in iron oxides and vary in color from dark grey, bright yellow, or deep purple to rusty red. The iron is usually found in the

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Biological Sciences / 6

2020. 4. 14.  This type of bacteria is capable of oxidizing practically all metal sulfides [2,7]. The aim of this study was isolation of autochthonous acidophilic chemolithotrophic microorganisms associations for further possible application of these associations in the of bacterial leaching of sulfide ores from waste.

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