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microorganisms capable of oxidizing iron ore

Iron Bacteria | Article about Iron Bacteria by The Free Dictionary

Iron Bacteria. bacteria that are able to oxidize ferrous iron compounds and to use the energy thus liberated to assimilate carbon from carbon dioxide or carbonates. The equation for the oxidation is. 4Fe (HCO3) 2 + 6H 2 O + O 2 = 4Fe (OH)3 +4H2 CO 3 + 4CO2. In this reaction a small amount of energy is liberated; there-fore, iron bacteria ...

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Massive ore deposits from microscopic organisms - PubMed Central (PMC)

Massive ore deposits from microscopic organisms. Published in final edited form as: Soil bacterial and fungal communities across a pH gradient in an arable soil: The ISME Journal, v. 4, p. 1340-1351, 10.1038/ismej.2010.58. [ PubMed] [ CrossRef] [ Google Scholar] Saalfield SL, and Bostick BC, 2009, Changes in iron, sulfur, and arsenic ...

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Microbial oxidation and reduction of manganese: Consequences in ...

Mechanisms of the oxidation of divalent iron and manganese by iron bacteria growing at a neutral pH of medium. ... a microorganism capable of coupling the complete oxidation of organic compounds to the reduction of iron and other metals. ... Selective and non-selective bioleaehing of manganese from a manganese-containing silver ore.

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Biomineralization of Iron ore Tailing soil with Iron oxidizing bacteria ...

The highest microbial count and the microbial load were at day 15 (7.1x109) in bioaugmented soil. The highest iron dissolution percentage was found at day 60 (83.3%) in bioaugmented soil. The...

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Metal-eating microbes in African lake could solve ... - ScienceDaily

By oxidizing iron, these microorganisms likely helped shape the chemistry of Earth over billions of years, ultimately leading to the evolution of more complex life such as plants and animals. make ...

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Contribution of bacterially-induced oxidation of Fe-silicates in iron ...

A diverse array of microorganisms, found within the uppermost lithosphere, can mediate the dissolution and precipitation of minerals and therefore contribute to the formation of laterites. The Salobo iron-oxide copper gold (IOCG) mine in Brazil is an ideal environment to examine the specific interaction between iron-oxidising bacteria and ferrous iron-bearing minerals during formation of a ~60 ...

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Microorganism for use in industrial processes - Chemolithotrophs, Inc

The microorganism will also oxidize iron over a wide range of temperatures, as shown in FIG. 2. At 5° C., an iron oxidation rate of 600 mg/l/hour is observed; at 37° C., 1000 mg/l/hour. Ferroxifunis bagdadii can also derive energy from the oxidation of sulfur, sulfide, sulfite, thiosulfates, polythionates, antimony and carbon.

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Dynamic mathematical model for microbial removal of pyritic sulfur from ...

The U.S. Department of Energy's Office of Scientific and Technical Information

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Technical Report UDC 628 . 54 : 669 . 1 Biological Treatment Process of ...

under acidic conditions (about pH 2 to 3) have reportedly been used in the fields of mine wastewater treatment and bioleaching.5) Iron- oxidizing bacteria, as typified by Acidithiobacillus ferrooxidans, are autotrophic bacteria that use energy produced during the iron oxida- tion reaction process for carbon assimilation.

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Kabuno Bay shows how life built the largest iron deposits - ZME Science

Bacteria that "dine" on iron aren't news: they were discovered since 1993; the new study however is the first to provide evidence of how these microorganisms could have played the central role in...

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"Studies on the biological oxidation of ferrous iron and chalcopyrite ...

The copper in the leaching streams is precipitated by displacement with iron. As a result of this procedure the solution is high in ferrous iron concentration and has a pH of near 3.7. The bacteria in the leaching streams are capable of oxidizing ferrous iron to the ferric state and sulfide minerals to sulfates.

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Abstract - Graphy Publications

Otherwise, some microorganisms are capable of oxidizing metallic species on a solid mineral surface, generating water-soluble compounds. This ... In some cases, the metal oxide is associated with iron ore deposits. As demonstrated in bioleaching equations, ferric iron is generated by catalysis micro-organic action and is capable of solubilizing ...

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Metal-eating microbes in African lake could s | EurekAlert!

The UBC study of the Kabuno Bay iron microbes supports that theory. The microbes metabolize iron and grow at rates high enough to indicate their ancient equivalents were capable of depositing some...

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Bacterial Oxidation of Ferrous Iron and RISCs at Low Temperatures ...

Chilean copper production has been growing in the last 20 years reaching an annual production of 5,557,000 tons of Cu in 2007. For each ton of copper produced, about 200 tons of sterile and low grade ore and 100 tons of tailings are discharged in the environment. Most of these wastes contain significant amounts of sulphide minerals, mainly pyrite, and once submitted to weathering, may produce ...

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Mineral and iron oxidation at low temperatures by pure and mixed ...

This suggests that although efficient At. ferrooxidans SS3 mediated biological oxidation of ferrous iron occurred, chemical oxidation of the sulfide minerals by ferric iron was rate limiting. In the column reactors, the leaching rates were much less affected by low temperatures than in the stirred tank reactors.

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Metal-eating microbes in African lake could solve mystery of the planet ...

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 leading ...

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Functional diversity of an aboriginal microbial community oxidizing the ...

Five moderately thermophilic iron-oxidizing bacteria, including representative strains of the three classified species, were shown to be capable of reducing ferric iron to ferrous iron when they were grown under oxygen limitation conditions. 172 Highly Influential PDF View 9 excerpts, references background

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Frontiers | Weak Iron Oxidation by Sulfobacillus thermosulfidooxidans ...

Ferrous iron (Fe 2+ )-oxidizing acidophilic microorganisms are responsible for the regeneration of the chemical oxidant ferric iron (Fe 3+ ), which in turn attacks the sulfidic mineral, and breaks its covalent bonds. This releases ferrous iron plus any other contained metals and completes the catalytic cycle ( Vera et al., 2013 ).

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Iron oxidizing bacteria: insights on diversity, mechanism of iron ...

Bacterium Sideroxydans paludicola is able to oxidize 60% of the iron in a bioreactor under low oxygen concentrations. Bacterium G. ferruginea requires Fe (II) for its growth under microaerophilic condition.

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An Archaeal Iron-Oxidizing Extreme Acidophile Important in ... - Science

This iron-oxidizing Archaeon is capable of growth at pH 0. This species represents a dominant prokaryote in the environment studied (slimes and sediments) and constituted up to 85% of the microbial community when solution concentrations were high (conductivity of 100 to 160 millisiemens per centimeter).

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Peculiarities of Adhesion and Bioleaching of Pyrite by New Isolated ...

pyrite is previously colonized by sulfur oxidizing bacteria and then the adhesion of Leptospirillum sp. strain ZC on pyrite surface is observed. It is known that sulfur oxidizing bacteria more likely adhere on hidrofobic surfaces. As iron ions have been removed from the surface during initial treatment of pyrite (by boiling hydrocloric acid), it is

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California Researchers Accidentally Discover Metal Eating Bacteria

Iron-Respiring Bacteria. ... 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 ...

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Desulfurization of coal by microbial column flotation

The U.S. Department of Energy's Office of Scientific and Technical Information

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Isolation and characterization of an acid and metal tolerant ...

Metal oxidizing bacteria are industrially important microorganisms for applications such as biomining and bioremediation. Biomining which involves the extraction of metals from their ores [] with the use of bacteria is well established as an alternative to conventional physical and chemical methods [2,3,4].The efficiency of metal oxidizing bacteria in the bioremediation of metal polluted sites ...

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Metal-eating microbes in African lake could solve mystery of the planet ...

The UBC study of the Kabuno Bay iron microbes supports that theory. The microbes metabolize iron and grow at rates high enough to indicate their ancient equivalents were capable of depositing some...

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Existence of a Hydrogen Sulfide:Ferric Ion Oxidoreductase in Iron ...

Isolation and identification of an iron-oxidizing bacterium which can grow on tetrathionate medium and the properties of a tetrathionate- decomposing enzyme isolated from the bacterium T. Sugio, T. Kanao, H. , T. Nagasawa, R. Blake Biology 1996 23 Molecular genetics of Thiobacillus ferrooxidans. D. Rawlings, T. Kusano Biology

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Photoferrotrophy, deposition of banded iron formations, and methane ...

Banded iron formations (BIFs) host the world's largest iron ore deposits, and they formed predominantly through the deposition of ferric iron [Fe(III)] from ferruginous oceans during the Archean Eon (1, 2).Most models for BIF deposition invoke photosynthesis in the oxidation of ferrous iron from seawater to induce its subsequent precipitation and deposition as mixed valence iron (oxyhydr ...

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iron-oxidizing bacteria | Übersetzung Englisch-Deutsch - dict.cc

dict.cc | Übersetzungen für 'iron-oxidizing bacteria' im Englisch-Deutsch-Wörterbuch, mit echten Sprachaufnahmen, Illustrationen, Beugungsformen, ...

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Microbial Bioremediation | Boundless Microbiology | | Course Hero

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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Challenges of Biohydrometallurgy in the Circular Economy

This technology seeks to minimize the use of ore beneficiation operations as comminution, concentration, e.g., reducing waste generation [9,10]. ... using microorganisms to solubilize and recover valuable metals from ores [10]. The use of bacteria capable of oxidizing iron and/or sulfur ores, such as acidophilic bacteria of the genera ...

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Producing Copper Nature's Way: Bioleaching

Bioleaching involves the use of microorganisms to catalyze the oxidation of iron sulfides to create ferric sulfate and sulfuric acid. Ferric sulfate, which is a powerful oxidizing agent, then oxidizes the copper sulfide minerals and the copper contained is then leached by the sulfuric acid formed. In the case of uranium, the ferric sulfate ...

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Heap bioleaching of a complex sulfide ore: Part II. Effect of ...

Results indicate that autotrophic bacteria were involved in the solubilisation of iron from the gossan samples, and this activity was exhibited at the lowest temperature ever reported. 65 PDF Mineral and iron oxidation at low temperatures by pure and mixed cultures of acidophilic microorganisms M. Dopson, Anna-Kaisa Halinen, +5 authors J. Puhakka

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US8372628B2 - Sulfur-oxidizing bacteria and their use in ... - Google

The present invention is related to an isolated chemolithotrophic bacterium belonging to species Acidithiobacillus thiooxidans named Licanantay, deposited in Deutsche Sammlung von Mikroorganismen and Zellkulturen -DSMZ with number DSM 17318, and its use in pure form or in mixtures that contains it for bioleaching processes of minerals or sulfured metallic species concentrates.

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Massive ore deposits from microscopic organisms - PubMed Central (PMC)

Mar 21, 2022Massive ore deposits from microscopic organisms. Published in final edited form as: Soil bacterial and fungal communities across a pH gradient in an arable soil: The ISME Journal, v. 4, p. 1340-1351, 10.1038/ismej.2010.58. [ PubMed] [ CrossRef] [ Google Scholar] Saalfield SL, and Bostick BC, 2009, Changes in iron, sulfur, and arsenic ...

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Microorganisms pumping iron: anaerobic microbial iron oxidation and ...

Lovley, D. R. et al. Geobacter metallireducens gen. nov. sp. nov., a microorganism capable of coupling the complete oxidation of organic-compounds to the reduction of iron and other metals. Arch ...

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Percolation Leaching of a Chalcopyrite-Bearing Ore at Ambient and ...

Copper extraction after inoculation of ore with thermophilic bacteria. ... Iron--oxidizing bacteria (Thiobac­ ... (3, 5-6) and are capable of growing at temperatures of 45° to 80° C and at pH values of 1 to 6 (4), Thermophilic bac­ teria were found particularly useful in ...

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Chilean scientist plans to clean up mining with 'metal eating' bacteria

Chile is the world's largest producer of copper, which accounts for up to 15 percent of the country's GDP, resulting in a lot of mining waste that pollutes the environment. In her research, Reales,...

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Dynamic of active microorganisms inhabiting a bioleaching industrial ...

The most prominent microorganisms making up these communities are Gammaproteobacteria ( At. ferrooxidans and At. thiooxidans) and some members of phylum Nitrospira ( L. ferriphilum ). These microorganisms have been found in most studies in bioleaching heaps (Table S1).

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10.1016/j.procbio.2011.04.016 | DeepDyve

In addition to bacteria capable of oxidizing iron and/or sulfur (genus: Acidithiobacillus ), bacteria known to oxidize iron and not sulfur (e.g. Leptospirillum ferrooxidans) became enriched on NFC (20-220 mg iron/l in CSTR leach liquors) but not on GFC (<5 mg/iron l in CSTR leach liquors), and species ubiquitous to arsenic-rich environments ...

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Microbial communities in acid mine drainage - Oxford Academic

The organisms can be used in ore processing and are a source of novel biomolecules (especially enzymes) for industrial processes. ... is possible to estimate the magnitude of the microbial impact in a natural environment if information about numbers of iron-oxidizing microorganisms is available. Using this approach, ... (capable of Fe and S ...

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