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leaching of copper ore with thiobacillus ferrooxidans

Leaching of Copper Ore by Thiobacillus Ferrooxidans. ERIC

Leaching of Copper Ore by Thiobacillus Ferrooxidans. Lennox, John; Biaha, Thomas. American Biology Teacher, v53 n6 p361-68 Sep 1991. A quantitative laboratory exercise based upon the procedures copper manufacturers employ to increase copper production is described. The role of chemoautotrophic microorganisms in biogeologic process is emphasized.

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"Leaching of Copper Ore" by Thiobacillus Ferrooxidans

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Leaching of Turkish copper ore samples with Thiobacillus

Jan 01, 1999· The yield of bacterial leaching of copper with Ergani and Murgul samples was lower than that with Kure samples. The Ergani sample contained pyrrhotite

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(PDF) Biorecovery of Copper from Chalcopyrite Ore Using

To determine the efficacy of chalcopyrite bioleaching using pure cultures of Thiobacillus ferrooxidans or Thiobacillus thiooxidans and a mixed culture composed of Thiobacillus ferrooxidans and

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Role of cell attachment in leaching of chalcopyrite

Nov 01, 1991· Experiments on the leaching of copper from chalcopyrite mineral by the bacterium Thiobacillus ferrooxidans show that, in the presence of adequate amounts of sulphide, iron-grown bacteria preferentially oxidise sulphur in the ore (through direct attachment) rather than ferrous sulphate in solution. At 20% pulp density, the leaching initially takes place by a predominantly direct mechanism.

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Copper Mining Using Acidothiobacillus microbewiki

Jul 23, 2011· Iasillo E (1999) Metallurgical test program for copper leaching projects. In Copper Leaching, Extraction, and Electrowinning Techniques, ed. Jergensen GV. 124-128. Littleton: SME. Leduc LG and Ferroni GD (1994) The chemolithotrophic bacterium Thiobacillus ferrooxidans. FEMS Microbiology Reviews 14:103-120.

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The Use of Thiobacillus Ferrooxidans Bacteria in the

Kinetic parameters of the process and contents of copper and iron in the medium after leaching of chalcopyrite with the use of Thiobacillus ferrooxidans bacteria. (Temp. 37°C, pH = 2.2, mineral grain size below 0.06 mm, ironless Silverman medium, k 1 leaching rate

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Leaching of chalcopyrite concentrates with thiobacillus

Dec 01, 1976· Hydrometallurgy, 2(1976)87--103 87 Elsevier Scientific Publishing Company, Amsterdam -- Printed in The Netherlands LEACHING OF CHALCOPYRITE CONCENTRATES WITH THIOBACILLUS FERROOXIDANS IN BATCH CULTURE A. PINCHES, F.O. AL-JAID, D.J.A. WILLIAMS Department of Chemical Engineering, University College of Swansea, Swansea (Great Britain) and B.

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Bacterial leaching of ores and other materials

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 but also copper, zinc, molybdenum and presumable some other metals in the form of

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Bioleaching: Introduction, Methods, Application, Copper

Thiobacillus thiooxidans and Thiobacillus ferrooxidans are generally seen associated with leaching dumps. In pilot plant reactors of 50 liter capacity, leaching can be performed continuously in a cascade series with recycling of cells and leachates.

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(PDF) Biorecovery of Copper from Chalcopyrite Ore Using

To determine the efficacy of chalcopyrite bioleaching using pure cultures of Thiobacillus ferrooxidans or Thiobacillus thiooxidans and a mixed culture composed of Thiobacillus ferrooxidans and

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Leaching of chalcopyrite by Thiobacillus thiooxidans and

Feasibility for bacterial leaching of two different copper ores from Pakistan was investigated with locally isolated, acidophilic thiobacilli in shake flask culture at 28±2°C. After a lag period of 16 d,Thiobacillus thiooxidans solubilized up to 19%

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Copper Mining Using Acidothiobacillus microbewiki

Jul 23, 2011· Iasillo E (1999) Metallurgical test program for copper leaching projects. In Copper Leaching, Extraction, and Electrowinning Techniques, ed. Jergensen GV. 124-128. Littleton: SME. Leduc LG and Ferroni GD (1994) The chemolithotrophic bacterium Thiobacillus ferrooxidans. FEMS Microbiology Reviews 14:103-120.

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Catalytic Efficiency of Acidithiobacillus ferrooxidans for

We observed that about 80-90% of the total Cu content present in the ore matrix was solubilized during 30 days of the leaching process mediated by Acidithiobacillus ferrooxidans at 30ºC. Copper dissolution from ore was found to be directly related to the reaction pH (1.5-1.9).

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The Use of Thiobacillus Ferrooxidans Bacteria in the

Kinetic parameters of the process and contents of copper and iron in the medium after leaching of chalcopyrite with the use of Thiobacillus ferrooxidans bacteria. (Temp. 37°C, pH = 2.2, mineral grain size below 0.06 mm, ironless Silverman medium, k 1 leaching rate

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In situ leach Wikipedia

Sometimes oxidation is speeded by the bacteria Thiobacillus ferrooxidans, which feeds on sulfide compounds. Copper ISL is often done by stope leaching, in which broken low-grade ore is leached in a current or former conventional underground mine. The leaching may take place in backfilled stopes or caved areas. In 1994, stope leaching of copper

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Leaching of chalcopyrite concentrates with thiobacillus

Dec 01, 1976· Hydrometallurgy, 2(1976)87--103 87 Elsevier Scientific Publishing Company, Amsterdam -- Printed in The Netherlands LEACHING OF CHALCOPYRITE CONCENTRATES WITH THIOBACILLUS FERROOXIDANS IN BATCH CULTURE A. PINCHES, F.O. AL-JAID, D.J.A. WILLIAMS Department of Chemical Engineering, University College of Swansea, Swansea (Great Britain) and B.

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Bacterial leaching of ores and other materials

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 but also copper, zinc, molybdenum and presumable some other metals in the form of

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Interfacial activity and leaching patterns of

Abstract. The leaching ability of Leptospirillum ferrooxidans goes beyond the mere oxidation of Fe 2+ to Fe 3+.Addition of these bacteria to pyrite triggers interfacial phenomena that lead to bacterial attachment and local forms of corrosion (surface pitting).

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Role of cell attachment in leaching of chalcopyrite

Abstract. Experiments on the leaching of copper from chalcopyrite mineral by the bacterium Thiobacillus ferrooxidans show that, in the presence of adequate amounts of sulphide, iron-grown bacteria preferentially oxidise sulphur in the ore (through

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Bioleaching Wikipedia

Process. Bioleaching can involve numerous ferrous iron and sulfur oxidizing bacteria, including Acidithiobacillus ferrooxidans (formerly known as Thiobacillus ferrooxidans) and Acidithiobacillus thiooxidans (formerly known as Thiobacillus thiooxidans).As a general principle, Fe 3+ ions are used to oxidize the ore. This step is entirely independent of microbes.

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Bacterial leaching of a sulfide ore by Thiobacillus

Bacterial leaching of a sulfide ore containing pyrite, chalcopyrite, and sphalerite was studied in shake flask experiments using Thiobacillus ferrooxidans and Thiobacillus thiooxidans strains isolated from mine sites. The Fe 2+ grown T. ferrooxidans isolates solubilized sphalerite preferentially over chalcopyrite leaching 7–10% Cu, 68–76% Zn, and 10–22% Fe from the ore in 18 days.

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Role of Cobaltous Sulfide Leaching of Thiobacillus

inhibition by stannous, nickel, zinc, silver, andmercuric ions, a newrole ofFe2+ in bacterial leaching in T. ferrooxidans is proposed. Thiobacillusferrooxidans inhabits drainage in acid mines and is used for bacterial leaching. Attention to bacterial leachinghasincreasedin recentyearsbecauseofits applica-tion to low-gradeores. However,there is

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