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iron ore bioleaching :

A rheological study of the bioleaching process of an iron ...

2019-12-1  Bioleaching was used to dissolve zinc, phosphorus, potassium and calcium oxide found in iron concentrates using acidophilic microorganisms to enhance the iron yield. Rheological properties of the mineral pulps revealed a maximum in the zero shear-rate viscosity (0.068 Pa s) during day 5 of the process.

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Study on Bioleaching of Sulfur in Iron Ore by Mixed ...

Iron ore is the raw material for steel production, in addition to iron and slag major component, still contains sulfur and phosphorus compounds and other harmful elements, is the potential adverse effects of factors constitute the steel product quality and environment.

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Study on Bioleaching of Sulfur in Iron Ore by Mixed ...

Compared with original sample, sulfur content decreased 95.06%, iron grade increased by 9.25%, and iron recovery was 94.13%. From the results it can be concluded that this microbial process for...

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Bioleaching bacteria may become useful in iron ore ...

2014-11-16  Bioleaching is the term given to using microorganisms to extract metals from ore. CSIRO environmental microbiologist Dr Suzy Rea headed the survey, which was conducted under the Water Reuse and Environmental Process

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How feasible is iron bioleaching? - ResearchGate

A Prelimary Molecular Approach for Characterizing Microorganisms Having the Potentials for Bioleaching of Iron Ore. Article. Full-text available. Aug 2016; Emmanuel Ekpa. Ikechukwu

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A rheological study of the bioleaching process of an iron ...

Bioleaching was used to dissolve zinc, phosphorus, potassium and calcium oxide found in iron concentrates using acidophilic microorganisms to enhance the iron yield. Rheological properties of the mineral pulps revealed a maximum in the zero shear-rate viscosity (0.068 Pa s) during day 5 of the process.

More

FUNGAL LEACHING OF IRON ORE: ISOLATION,

This study was performed to isolate and characterize iron solubilizing fungi from low grade iron ore for bioleaching process. Soil samples from iron mine area were used for isolation of iron solubilizing fungi and two fungal species (NTS-1 and NTS-2) were obtained from enrichment culture method.

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A Prelimary Molecular Approach for Characterizing ...

2019-9-4  Article A Prelimary Molecular Approach for Characterizing Microorganisms Having the Potentials for Bioleaching of Iron Ore Emmanuel Ekpa 1,*, Ikechukwu Onwurah 2, Lawrence Ezeanyika 2, John Odiba 1 1 Department of Biosciences, College of Natural and Applied Sciences, Salem University Lokoja, Lokoja, Nigeria; [email protected]

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Intensification of Zinc Bioleaching from a Zinc–Iron ...

2020-11-7  The catalysts acted as an electron acceptor for Fe 3+ iron reduction. The amount of zinc bioleaching was obtained 88% for the ore and 95% for the second sample at the optimum pH of 1.8 in 18 days. The addition of starch and shredded newspaper increased the bioleaching rate of zinc.

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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.

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Bioleaching bacteria may become useful in iron ore ...

2014-11-14  14 Nov 2014 Steel iron ore A CSIRO bio-prospecting survey found the potential ‘bioleaching’ bacteria in the WA Wheatbelt, near Merredin. Bioleaching is the term given to using microorganisms to extract metals from ore.

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Bioleaching bacteria may become useful in iron ore ...

2014-11-16  Bioleaching bacteria may become useful in iron ore extraction. November 16, 2014 News s11_admin Ben Hagemann. Latest News. ... Bioleaching is the term given to using microorganisms to

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Effect of ore solid concentration on the bioleaching of ...

Dephosphorization of high-phosphorus iron ore is an unsolved problem worldwide so far. Biotechnology could be a cost-effective and environment-friendly way to solve this problem. A novel method for bioleaching of phosphorus from high-phosphorus iron ores using indigenous sulfur-oxidizing bacteria from municipal wastewaters was first reported in this work.

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(PDF) Diversity and activity of phosphate bioleaching ...

Phosphorus content of the ore material is 0.18% (w:w) and, therefore, it is considered as a high-phosphorus iron ore. Among the culturable bacteria associated to the iron ore, four morphologically distinct bacterial strains showed high phosphate-solubilizing activity.

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Bioleaching of copper- and zinc-bearing ore using ...

Bioleaching of copper- and zinc-bearing ore using consortia of indigenous iron-oxidizing bacteria Extremophiles . 2018 Nov;22(6):851-863. doi: 10.1007/s00792-018-1042-7.

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Acidithiobacillus ferrooxidans: A bioleaching bacteria for ...

2019-5-8  grow faster on the ore particles with better iron(II) oxidation capability, in turn may have better bioleaching properties. In the present paper we described the protocol for selecting and characterizing improved strains of A. ferrooxidans, which had higher rate of iron(II) oxidation and better colonizing ability.

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Diversity and activity of phosphate bioleaching bacteria ...

2008-5-5  Diversity and activity of phosphate bioleaching bacteria from a high-phosphorus iron ore P. Delvasto c, A. Valverde b, A. Ballester a, J.A. Muñoz a, F. González a, M.L. Blázquez a, J.M. Igual b, C. García-Balboa a,⁎ a Biohydrometallurgy Research Group, Department of Materials Science and Metallurgical Engineering, Universidad Complutense de Madrid, Madrid-28040 Spain

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Isolation, identification and characterization of some ...

2018-8-30  isolated species are mesophilic-acidophiles with good bioleaching properties. Keywords: iron ore, 9k media, bioleaching, bacteria Journal of Bacteriology Mycology: Open Access Research Article Open Access. Isolation, identification and characterization of some bacteria from soil samples of agbaja iron ore

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Dissolution of Cu and Zn-bearing ore by indigenous iron ...

Disposing of low-grade ores involves numerous environmental issues. Bioleaching with acidophilic bacteria is the preferred solution to process these ores for metals recovery. In this study, indigenous iron-oxidizing bacteria Acidithiobacillus ferrooxidans, Leptospirillum ferriphilum, and Leptospiril

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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. The metabolism and cycling of Fe and S have been identified in many environments, such as mine tailings, AMD and acidic river 7 , 10 , 12 , 13 , which are comparable to ...

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Bioleaching bacteria may become useful in iron ore ...

2014-11-14  14 Nov 2014 Steel iron ore A CSIRO bio-prospecting survey found the potential ‘bioleaching’ bacteria in the WA Wheatbelt, near Merredin. Bioleaching is the term given to using microorganisms to extract metals from ore.

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Method for bioleaching phosphor in iron ore containing ...

2009-7-15  The invention provides a method for bioleaching phosphor in an iron ore containing phosphor, and belonging to the field of ore dressing. The method is characterized by comprising the following steps: firstly, crushing the iron ore containing phosphor until the granularity is between 0.075 and 1.0 mm roasting the iron ore at a temperature of between 500 and 1,200 DEG C for 15 to 120 minutes ...

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FUNGAL LEACHING OF IRON ORE: ISOLATION,

This study was performed to isolate and characterize iron solubilizing fungi from low grade iron ore for bioleaching process. Soil samples from iron mine area were used for isolation of iron solubilizing fungi and two fungal species (NTS-1 and NTS-2) were obtained from enrichment culture method.

More

Effect of ore solid concentration on the bioleaching of ...

Dephosphorization of high-phosphorus iron ore is an unsolved problem worldwide so far. Biotechnology could be a cost-effective and environment-friendly way to solve this problem. A novel method for bioleaching of phosphorus from high-phosphorus iron ores using indigenous sulfur-oxidizing bacteria from municipal wastewaters was first reported in this work.

More

Bioleaching Carbonaceous Gold Ores

2018-6-15  Because the ore only contained 2% iron, it was leached fairly rapidly; in two days, 50% of the iron was extracted in the 15% pulp and 75% of the iron was extracted in the 5% pulp (Table 3). For the 15% pulp, gold recovery was increased from 8.8% to only 35.9% following bioleaching

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Acidithiobacillus ferrooxidans: A bioleaching bacteria for ...

2019-5-8  grow faster on the ore particles with better iron(II) oxidation capability, in turn may have better bioleaching properties. In the present paper we described the protocol for selecting and characterizing improved strains of A. ferrooxidans, which had higher rate of iron(II) oxidation and better colonizing ability.

More

Bioleaching - Application of Biotechnology in Mining Industry

2011-5-12  Thibacillus thiooxidans extract sulphur from iron ore pyrite in the form of sulphates which is also a more soluble form. II) Indirect Bioleaching In the indirect method of bioleaching of minerals bacteria produces strong oxidizing agents which react with metals and extract them from the ores.

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Bioleaching of copper from waste printed circuit boards by ...

2018-2-22  It has been proved that the formation of biofilm is important in bioleaching of ore (More et al. 2014). The concentration of ferric iron and H + in biofilm is much higher than that in solution, which could greatly increase the dissolution rate of ores (Coram and Rawlings 2002). In non-contact mechanism, the bacteria are no need to adhere to 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. The metabolism and cycling of Fe and S have been identified in many environments, such as mine tailings, AMD and acidic river 7 , 10 , 12 , 13 , which are comparable to ...

More

湖南农业大学生物科学技术学院-学科建设-师资队伍-讲师

2020-3-12  The shift of microbial communities and their roles in sulfur and iron cycling in a copper ore bioleaching system. Scientific reports 2016, 6. 研究项目(近五年): 1> 主持国家自然科学基金(青年基金,No. 41807135 )1项,2019-2021年; 2> 主持湖南省自然科学

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