bioleaching of gold pyrite tailings with adapted bacteria

bioleaching of gold pyrite tailings with adapted bacteria

Bioleaching of gold pyrite tailings with adapted bacteria ...

1989-8-1  Bioleaching of gold pyrite tailings with adapted bacteria. Hy- drometallurgy, 22: 291-300. Auriferous sulfide ores often contain very finely disseminated gold and other precious metal particles inside the sulfide crystals. The encapsulation of precious metal particles gives rise to the refractory nature of such ores to current extraction methods.

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Bioleaching of gold pyrite tailings with adapted bacteria ...

Leadville gold ore tailings containing auriferous pyrite were first concentrated by froth flotation. The pyrite concentrate was treated for different periods of time with 12-weeks-adapted Thiobacillus ferrooxidans before cyanide leaching. The bioleaching of the concentrate before cyanide leaching increased the gold extraction from 32 to 95% and ...

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Bacteria Leaching of Gold Encapsulated in Pyrite

2018-2-19  With respect to the bioleaching rate of pyrite, it started at a high rate (0.38%/hr) during the first 2 days, because all the conditions were suitable for the

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(PDF) Biotechnology in gold processing

Bioleaching of gold pyrite tailings with adapted bacteria. ... tailings with bioleaching before using standard extraction techniques such as cyanidation.Leadville gold ore tailings containing ...

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Mechanism of enhanced bioleaching efficiency of ...

2008-6-1  Bioleaching of gold pyrite tailings with adapted bacteria Hydrometallurgy , 22 ( 3 ) ( 1989 ) , pp. 291 - 300 Article Download PDF View Record in Scopus Google Scholar

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Effect of bacterial adaptation and solution replacement on ...

1991-8-1  The effects of bacterial adaptation and partial replacement of leaching solution on the rate and extent of bioleaching reactions of a complex sulfidic gold ore were investigated.The ore was first concentrated by bulk sulfide flotation, and the sulfide concentrate was treated by bioleaching using Thiobacillus ferrooxidans. The residues from bioleaching were treated by cyanidation to extract the ...

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(PDF) Bacterial Leaching as a Pre-treatment Step for Gold ...

Bioleaching of gold pyrite tailings with adapted bacteria. ... This work investigates the feasibility of pre-treating these refractory tailings with bioleaching before using

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(PDF) AUTOCLAVE TECHNOLOGY OF REFRACTORY GOLD

Bioleaching of gold pyrite tailings with adapted bacteria. ... The bioleaching of the concentrate before cyanide leaching increased the gold extraction from 32 to 95% and that of silver from 48 to ...

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(PDF) BIOLEACHING OF PYRRHOTITE TAILINGS FOR NI

The present study investigated the bioleaching response of a low-grade nickeliferous pyrrhotite tailings (0.6 wt% Ni) and an upgraded pyrrhotite tailings (1 wt% Ni) produced by Vale Base Metals in ...

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Metal recovery from mine tailings using bacteria ...

1994-1-1  Canadian Metallurgical Quar- terly 10:57 (1971). 10. Gupta, A. and Ehrlich, H. L. Selective and nonselective bioleaching of manganese from a manganese-containing sil- ver ore. Journal of Biotechnology 9:287 (1989). 11. Attia, Y. A. and E1-Zeky, M. Bioleaching of gold pyrite tail- ings with adapted bacteria. Hydrometallurgy 22:291 (1989). 12.

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This Article

The result of bioleaching with the adapted bacteria for 42 days, the pH value of leaching-medium in the 3 weeks tend to increased, ... Attia, Y.A. and Elzeky, M., 1989, Bioleaching of gold pyrite tailings with adapted bacteria, Hydrometallurgy, 22, 291-300. 6. ...

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The Efficiency of Bioleaching Rates for Valuable Metal Ions ...

2012-8-31  The result of bioleaching with the adapted bacteria for 42 days, the pH value of leaching-medium in the 3 weeks tend to increased, whereas the pH of the 6 weeks decreased. In decreasing the pH value in the adaptation-medium and in the leaching-medium, it ...

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Bioleaching of Gold Ore Example GraduateWay

2018-2-4  Bioleaching is the process of using certain microbial bacteria in order to liberate a metal from ore. This process has been applied to copper and uranium ore for many years, but has more recently been applied to certain types of gold containing ore. Bioleaching of gold can be performed using a number of different techniques and various microbes ...

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Bioleaching of high pyrite carbon-rich sphalerite ...

2013-10-17  In this work, zinc extraction was investigated using bioleaching process. The used samples were carbon-rich preflotation tailings prepared from a lead–zinc mineral processing plant, located in Yazd province, Iran. Two samples were obtained with high amount of pyrite, while the first sample contained high arsenic (As) substitution in the pyrite crystal lattice, and it was about 4–5 times ...

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Bioleaching Test Procedure - Mineral Processing

2018-6-15  Bioleaching Test Procedure. Pulps of 20% solids is prepared from -200 mesh pyrite concentrate (after froth flotation), and is inoculated with 5% (V/V) of adapted bacterial solution. The bioleaching tests is carried out in 250 ml Erlenmayer flasks,

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Metal Mobilization by Iron- and Sulfur-Oxidizing Bacteria ...

2017-2-6  zinc, gold, and uranium via dump or heap bioleaching.20,21 High concentrations of chloride ions inhibit the growth of acidophilic microorganisms used in biomining, a problem particularly relevant to Australian and Chilean biomining operations.22 Few species of iron-

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Geochemical investigations of noble metal-bearing ores ...

Bioleaching is an environment-friendly alternative to the commonly used and toxic cyanidation protocols for gold extraction from refractory ores. In this paper, we investigate gold and silver bioleaching from porphyry and epithermal mineralisation systems, using iron

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Producing Copper Nature's Way: Bioleaching

2021-8-12  Likewise, in coal desulfurization, bacteria are used to oxidize the pyrite contaminant in the coal thus making the sulfur soluble as ferric sulfate. Since bioleaching is a natural process, one undesirable effect is the creation of metalliferous acid

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Capitulo6 - Biblioteca Digital - Universidad de Sonora

2012-9-26  Attia, VA., El-Zeki, M., 1989 "Bioleaching of Gold Pyrite Tailings With Adapted Bacteria". Hydrometallurgy. Vol.22. pp 291-300 Lynn S.N. 1989 "The Bioleachig and Processing of Refractory Gold Ore" Journal Minning, April pp 24-26

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La biolixiviation: apport des biotechnologies pour la ...

2016-10-4  Pyrite FeS2: 80% 1.38% cobalt disseminated in the pyrite lattice Bioleaching application for mine tailings reprocessing and metal recovery Biology: Identification of a biological activity around the stockpiles and in the drainage: natural bioleaching process Mesophile to moderate thermophile microbial

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Biotechnology for Metal Extraction, Mineral Beneficiation ...

2012-11-23  particular, heap leaching in the presence of bacteria is a very useful method to recover copper, uranium and gold from low grade ores and tailings. The contribution of bioleaching is estimated to be approximately 15, 13 and 25% of the total world production of copper, uranium and gold. For gold-

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Bioleaching Test Procedure - Mineral Processing

2018-6-15  Bioleaching Test Procedure. Pulps of 20% solids is prepared from -200 mesh pyrite concentrate (after froth flotation), and is inoculated with 5% (V/V) of adapted bacterial solution. The bioleaching tests is carried out in 250 ml Erlenmayer flasks,

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Preparatory bioleaching to the conventional cyanidation of ...

Bioleaching with Thiobacillus ferroxidans has been investigated at 30°C at bench scale on a gold-bearing arsenopyrite (2 g/t Au) ore coming from Golcuck Mine in Turkey. The study was concerned with the influence of the age of the inoculum, pH, pulp density and time of the bacterial leaching at 30°C on the recovery of gold during the ...

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Effect of biological pretreatment on metal extraction

Bioleaching experiments of flotation tailings were operated with 5L total solution in a titanium reactor. The solution contained 4500ml 0K medium (Table 2) with the adapted microbial culture as inoculum (500ml). The effect of solid concentration (w/v) (5%, 7.5%, 10% and 12.5%) on metal extraction was investigated at 32°C and 300rpm Table 1

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Geochemical investigations of noble metal-bearing ores ...

Auriferous sulphide ores often incorporate micro-fine (or invisible) gold and silver particles in a manner making their extraction difficult. Nobel metals are lost in the tailings due to the refractory nature of these ores. Bioleaching is an environment-friendly alternative to the commonly used and

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Capitulo6 - Biblioteca Digital - Universidad de Sonora

2012-9-26  Attia, VA., El-Zeki, M., 1989 "Bioleaching of Gold Pyrite Tailings With Adapted Bacteria". Hydrometallurgy. Vol.22. pp 291-300 Lynn S.N. 1989 "The Bioleachig and Processing of Refractory Gold Ore" Journal Minning, April pp 24-26

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La biolixiviation: apport des biotechnologies pour la ...

2016-10-4  Pyrite FeS2: 80% 1.38% cobalt disseminated in the pyrite lattice Bioleaching application for mine tailings reprocessing and metal recovery Biology: Identification of a biological activity around the stockpiles and in the drainage: natural bioleaching process Mesophile to moderate thermophile microbial

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张瑞永-中国科学院大学-UCAS

2020-1-1  (21) Interactions of the extremely acidophilic archaeon Ferroplasma acidiphilum with acidophilic bacteria during pyrite bioleaching, Applied Environmental Biotechnology, 2016, 通讯作者 (22) Chapter 6 The Biofilm Lifestyle of Acidophilic Metal/Sulfur-Oxidizing Microorganisms, Biotechnology of Extremophiles: Grand Challenges in Biology and Biotechnology (Pabulo H.

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Bioleaching: Introduction, Methods, Application, Copper ...

2021-11-26  Bioleaching: Introduction, Methods, Application, Copper, Microorganisms, and Processes! Introduction to Bioleaching: Leaching process was first observed in pumps and pipelines installed in mine pits containing acid water. This process was later on employed for recovering metals from ores containing low quantity of the metal. Presently certain metals from sulfide ores and other ores are ...

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