microorganisms capable of oxidizing iron ore

microorganisms capable of oxidizing iron ore

Abstract 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

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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

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Microorganisms Oxidize Iron (II) Ions in the Presence

Acidophilic leaching microorganisms have been reported to be in general intolerant to high salinity, namely high concentrations of chloride. At present this restriction hampers the use of sea water for bioleaching technology. Enrichment cultures obtained in this study from a former ore deposit near the Spanish coast oxidize ferrous iron in the presence of up to 50 gL-1 NaCl at pH 2.5 and 37°C.

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Microorganisms pumping iron: anaerobic microbial

2006-10-1  It is now known that a broad diversity of microorganisms exist that are capable of aerobic, neutrophilic fe (II) oxidation and, although only three genera

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Metals Extraction from Sulfide Ores with

2019-1-2  The role of microorganisms in the acid mine drainage (AMD) , and description of pioneer iron- and sulfur-oxidizing bacterium A. ferrooxidans solved the mystery. Biohydrometallurgical approaches were implemented commercially since 1950s, due to various factors like metals prices [ 25 , 26 ], production cost [ 52 ], and hurdles in ore exploration via conventional practices [ 26 ].

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Manganese biomining: A review - ScienceDirect

2011-8-1  The exploitation of microorganisms capable of oxidizing iron and sulfur in industrial processes for extraction of metals from low grade mineral ores containing manganese, copper, gold and uranium is a well established biotechnology . In addition to chemical leaching processes, a lot of emphasis has been given to biological treatment that generally uses heterotrophic microorganisms.

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Oxidation and Reduction of Iron by Acidophilic

2018-6-6  In addition to the well‐known autotrophic ferrous iron‐oxidizing organisms, new heterotrophic isolates have been described that are capable of oxidizing ferrous iron. Microorganisms can also play an important role in the reductive part of the iron cycle. Both heterotrophic and autotrophic organisms may also be involved in this process.

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Genomics, metagenomics and proteomics in

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 biotechnology with distinctive advantages over traditional mining.

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Thermophilic microorganisms in biomining

2016-9-15  In conclusion, polyextremophiles capable of oxidizing iron(II) and/or sulfur at temperatures higher than 60 °C and pH values close to 1 are essencial to achieve successful leaching processes at high temperatures and low pH values.

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Application of biotechnology in iron ore beneficiation ...

2015-1-1  Shen et al. (2012) also found that acidophilic bioleaching microorganisms effectively bioleach phosphorus from iron ore when they added high-phosphorus iron ore and elemental sulfur to municipal wastewater to make an iron ore slurry. Apatite was the main phosphorus mineral in the iron ore and the wastewater contained native sulfur-oxidizing bacteria.

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Microorganisms Oxidize Iron (II) Ions in the Presence

Acidophilic leaching microorganisms have been reported to be in general intolerant to high salinity, namely high concentrations of chloride. At present this restriction hampers the use of sea water for bioleaching technology. Enrichment cultures obtained in this study from a former ore deposit near the Spanish coast oxidize ferrous iron in the presence of up to 50 gL-1 NaCl at pH 2.5 and 37°C.

More

Microorganisms pumping iron: anaerobic microbial

2006-10-1  Iron (Fe) has long been a recognized physiological requirement for life, yet for many microorganisms that persist in water, soils and sediments, its role extends well beyond that of a nutritional ...

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Oxidation and Reduction of Iron by Acidophilic

2018-6-6  In addition to the well‐known autotrophic ferrous iron‐oxidizing organisms, new heterotrophic isolates have been described that are capable of oxidizing ferrous iron. Microorganisms can also play an important role in the reductive part of the iron cycle. Both heterotrophic and autotrophic organisms may also be involved in this process.

More

Metals Extraction from Sulfide Ores with

2019-1-2  The role of microorganisms in the acid mine drainage (AMD) , and description of pioneer iron- and sulfur-oxidizing bacterium A. ferrooxidans solved the mystery. Biohydrometallurgical approaches were implemented commercially since 1950s, due to various factors like metals prices [ 25 , 26 ], production cost [ 52 ], and hurdles in ore exploration ...

More

Repeated Anaerobic Microbial Redox Cycling of Iron

Some nitrate- and Fe(III)-reducing microorganisms are capable of oxidizing Fe(II) with nitrate as the electron acceptor. This enzymatic pathway may facilitate the development of anaerobic microbial communities that take advantage of the energy available during Fe-N redox oscillations. We examined th

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Metal-eating microbes in African lake could solve

2015-9-9  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

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Iron in primeval seas rusted by bacteria - Phys

2013-4-25  The iron in the Earth's ancient oceans was spat out of hot springs on the seafloor as dissolved, reduced ferrous [Fe(II)] iron. But most of today's iron ore is oxidized, ferric [Fe(III)] iron in ...

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Biobeneficiation of Iron Ores - article.sapub

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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author version Iron solubilization during anaerobic

2020-4-22  iron compounds were evident on the surface of the part-leached ore fragments. 2.2 Microorganisms Cultures used at 30 °C were the salt-tolerant, sulfur-oxidizing

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The shift of microbial communities and their roles in ...

2016-10-4  Iron and sulfur are major energy sources for microorganisms in copper ore bioleaching system, and bioleaching process always companied with transformation of FeS compounds. ... OTUs capable

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Repeated Anaerobic Microbial Redox Cycling of Iron

Some nitrate- and Fe(III)-reducing microorganisms are capable of oxidizing Fe(II) with nitrate as the electron acceptor. This enzymatic pathway may facilitate the development of anaerobic microbial communities that take advantage of the energy available during Fe-N redox oscillations. We examined th

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An Overview: Application of Microorganisms in Bio

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 The modern era of

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The role of microaerophilic Fe‐oxidizing

2016-7-8  Despite the historical and economic significance of banded iron formations (BIFs), we have yet to resolve the formation mechanisms. On modern Earth, neutrophilic microaerophilic Fe-oxidizing micro-organisms (FeOM) produce copious amounts of Fe oxyhydroxides, leading us to wonder whether similar organisms played a role in producing BIFs.

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Bacteria for oxidizing multimetallic sulphide ores - GB ...

A culture grown on an arsenopyritic concentrate at a pH of 0.28 was grown successfully on ferrous iron at pH 0.9 and 2.3 as well as on elemental sulphur at pH 0.9. It must therefore be concluded that the culture contained both T. thiooxidans and a special bacterial strain capable of oxidizing ferrous iron

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author version Iron solubilization during anaerobic

2020-4-22  iron compounds were evident on the surface of the part-leached ore fragments. 2.2 Microorganisms Cultures used at 30 °C were the salt-tolerant, sulfur-oxidizing

More

Metal-eating microbes in African lake could solve

2015-9-9  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

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An Archaeal Iron-Oxidizing Extreme Acidophile

2000-3-10  A new species of Archaea grows at pH ∼0.5 and ∼40°C in slime streamers and attached to pyrite surfaces at a sulfide ore body, Iron Mountain, California. 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 ...

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Iron in primeval seas rusted by bacteria -- ScienceDaily

2013-4-23  Iron in primeval seas rusted by bacteria. Researchers have been able to show for the first time how microorganisms contributed to the formation of the world's biggest iron ore deposits. The ...

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The shift of microbial communities and their roles in ...

2016-10-4  Iron and sulfur are major energy sources for microorganisms in copper ore bioleaching system, and bioleaching process always companied with transformation of FeS compounds. ... OTUs capable

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Microorganisms Free Full-Text Influence of ...

The risk of generation of acid drainages in the tailings of the Pan de Azúcar mine that closed its activities more than three decades ago, was evaluated through biooxidation studies using iron- and sulfur-oxidizing extremophilic leaching consortia. Most of tailings showed a high potential for generating acid drainage, in agreement with the results from net acid generation (NAG) assays.

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