Leaching of Copper-Bearing Mineral Substrates with Wild ...

Groudev S. (1980) Leaching of Copper-Bearing Mineral Substrates with Wild Microflora and with Laboratory-Bred Strains of Thiobacillus Ferrooxidans. In: Trudinger P.A., Walter M.R., Ralph B.J. (eds) Biogeochemistry of Ancient and Modern Environments.

Get Price

Bioleaching of different copper sulfides by ...

2013-11-1  A suitable amount of initial ferrous ion promotes copper leaching. After 48-d of leaching, the copper extractions with initial ferrous ions of 1.5 gL − 1, 2.5 gL − 1, and 4.5 gL − 1 were 95%, 85% and 77%, respectively. The copper extraction without initial ferrous ions was 88%.

Get Price

Leaching of Copper-Bearing Mineral Substrates with Wild ...

Groudev S. (1980) Leaching of Copper-Bearing Mineral Substrates with Wild Microflora and with Laboratory-Bred Strains of Thiobacillus Ferrooxidans. In: Biogeochemistry of

Get Price

Column bioleaching of low-grade copper ore by ...

2013-1-1  From day 17 to day 55, the temperature of leached solution dropped from 26 to 18 °C, whilst the copper extraction rates in both columns A and B slowed down. The optimum growth temperature of A. ferrooxidans and Acidiphilium sp. DX1-1 was 30 °C.

Get Price

Gold Copper Bioleaching - 911 Metallurgist

2015-2-28  The term indirect leaching is used here to describe the role of T. ferrooxidans in regenerating the ferric sulfate which dissolves the copper sulfides. Direct leaching occurs when the T. ferrooxidans

Get Price

Factors influencing bioleaching copper from waste printed ...

2009-6-1  Before starting the leaching process, A. ferrooxidans was cultivated for 3–4 days as stock culture, until the concentration of Fe 3+ ions had reached about 7.00 g/L, which was considered strong enough to dissolve metallic copper.

Get Price

Bioleaching of copper from metal concentrates of waste ...

2015-7-2  During the abiotic leaching process, the pH always kept increasing, whereas the pH exhibited an increase and showed a decrease after 78 h in the bacterial leaching process. After 78 h, the leaching efficiency of copper was 92.57 and 17.70 % from biotic and abiotic leaching, respectively. In addition, 96.75 and 43.33 % was leached in 174 h at last.

Get Price

Bioleaching of metals from printed wire boards by ...

2009-12-30  Percentage of copper solubilized in leaching solution with leaching time by the pure culture of A. ferrooxidans, the pure culture of A. thiooxidans, and the mixed culture of A. ferrooxidans and A. thiooxidans at (a) 1.0–3.0 and (b) 0.5–1.0 mm of sieve fraction under 7.8 g l −1 of the concentration of PWBs are shown in Fig. 3.

Get Price

Catalytic effect of graphene in bioleaching copper from ...

2017-8-1  The leaching rates of copper in three conditions are shown in Fig. 4. 75% of copper was leached by only adding A. ferrooxidans, while 82% of copper was leached through adding A. ferrooxidans, and graphene, and no copper leached basically when only adding graphene.

Get Price

Leaching of Copper-Bearing Mineral Substrates with Wild ...

Groudev S. (1980) Leaching of Copper-Bearing Mineral Substrates with Wild Microflora and with Laboratory-Bred Strains of Thiobacillus Ferrooxidans. In: Trudinger P.A., Walter M.R., Ralph B.J. (eds) Biogeochemistry of Ancient and Modern Environments.

Get Price

Leaching of Copper-Bearing Mineral Substrates with Wild ...

Groudev S. (1980) Leaching of Copper-Bearing Mineral Substrates with Wild Microflora and with Laboratory-Bred Strains of Thiobacillus Ferrooxidans. In: Biogeochemistry of

Get Price

Column bioleaching of low-grade copper ore by ...

2013-1-1  The aim of this investigation was to compare a pure culture of Acidithiobacillus ferrooxidans GF with a mixed culture with Acidiphilium sp. DX1-1 in the bioleaching of low-grade copper ore. The leaching experiments were carried out at ambient temperature. The influence of temperature, pH, redox potential and concentration of total iron and ferric ion in solution on the performance of column ...

Get Price

Research Article Characterization of Extreme Acidophile ...

2019-7-31  Copper leaching eciency Leaching eciency (%) Particle size of PCB (mm) 0.250.42 0.420.84 >0.84 (b) F : Di erent particle sizes of PCB and medium pH changed with time (a) and days leaching and copper leaching e ciency (b). T : Analysis of metal concentration parameter. Argon plasma channel Assist the argon gas ow Spray the argon gas ow

Get Price

(PDF) Comparsion of bioleaching of copper sulphides by ...

Dissolution of copper and zinc present in a complex sulfide concentrate were examined by applying bioleaching technique with aid of the pure Acidithiobacillus ferrooxidans. The leaching rate of ...

Get Price

Gold Copper Bioleaching - 911 Metallurgist

2015-2-28  The term indirect leaching is used here to describe the role of T. ferrooxidans in regenerating the ferric sulfate which dissolves the copper sulfides. Direct leaching occurs when the T. ferrooxidans or other bacteria directly attack the mineral surfaces.

Get Price

[Role of Thiobacillus ferrooxidans in leaching Ni, Cu, Co ...

[Role of Thiobacillus ferrooxidans in leaching Ni, Cu, Co, Fe, Al, aMg and Ca from the ores of copper-nickel deposits] Mikrobiologiia . Nov-Dec 1971;40(6):1100-7.

Get Price

Column bioleaching copper and its kinetics of waste ...

In this work, a column bioleaching of copper from waste printed circuit boards (WPCBs) by Acidithiobacillus ferrooxidans has been investigated. After column bioleaching for 28d, the copper recovery reached at 94.8% from the starting materials contained 24.8% copper.

Get Price

Investigation of Acidithiobacillus ferrooxidans in pure ...

2016-3-23  Investigation of Acidithiobacillus ferrooxidans in pure and mixed-species culture for bioleaching of Theisen sludge from former copper smelting C. Klink, Institute of Biosciences, TU Bergakademie Freiberg, Freiberg, Germany ... The bioleaching approach was scaled up in stirred-tank bioreactors resulting in higher leaching

Get Price

Copper leaching from waste electric cables by ...

2015-3-4  Leaching Bioleaching Acidithiobacillus ferrooxidans abstract This study examines the leaching of copper from waste electric cables by chemical leaching and leaching catalysed by Acidithiobacillus ferrooxidans in terms of leaching kinetics and reagents consumption. Operational parameters such as the nature of the oxidant (Fe3+,O

Get Price

Chalcopyrite bioleaching by A. ferrooxidans and surface ...

Based on the fact that the primary copper sulfide bioleaching has long leaching time and low leaching rate and has not been used in industry, through selective breeding, domesticated species leaching good using the scanning electron microscopy. The chalcopyrite bioleaching by A. ferrooxidans was studied. Understanding of passivation phenomenon of chalcopyrite surface and the types of ...

Get Price

What role does Acidithiobacillus ferrooxidans play in the ...

What role does Acidithiobacillus ferrooxidans play in the copper leaching process? asked Sep 17, 2015 in Biology Microbiology by Rolph. A) oxidation of sulfide to sulfate

Get Price

Investigation of Acidithiobacillus ferrooxidans in pure ...

2016-3-23  Investigation of Acidithiobacillus ferrooxidans in pure and mixed-species culture for bioleaching of Theisen sludge from former copper smelting C. Klink, Institute of Biosciences, TU Bergakademie Freiberg, Freiberg, Germany ... The bioleaching approach was scaled up in stirred-tank bioreactors resulting in higher leaching

Get Price

LEACHING OF LOW-GRADE COPPER ORES: A CASE STUDY

2017-6-9  ferrooxidans and Acidithiobacillus thiooxidans. Kinetics of the leaching of the copper sulphide was significantly slower than the leaching of carbonates and oxides of copper, and the mechanism and the stoichiometry of the process were more complex due to the participation of oxidants in them. For the

Get Price

Evaluation of Leptospirillum ferrooxidans for Leaching ...

1992-1-1  The importance of Leptospirillum ferrooxidans for leach processes has been evaluated by studying the lithotrophic flora of three mine biotopes and a heap leaching operation, by percolation experiments with inoculated, sterilized ore, and by morphological, physiological, and genetic investigations of pure and mixed cultures of L. ferrooxidans, Thiobacillus ferrooxidans, and Thiobacillus ...

Get Price

Thiobacillusferrooxidans engineering applications

2019-4-9  Its commercial application in the leaching of copper from waste grade ore dumps was demonstrated by the Kennecott Copper Corporation, USA in 1963. During the last three decades, the commercial utility of this microorganism has been proved in the ... ferrooxidans to a number of sulphide minerals has been studied quantitatively by

Get Price

Microbial Leaching of Copper from Waste Electronic Scraps ...

Microbial leaching was used to mobilize copper from two kinds of waste electronic scraps used as raw materials for printed wire boards. Both of Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans used to solubilize copper from the samples. The experimental results demonstrated that the percentages of copper basically increased with decrease of sieve fraction of the samples.

Get Price

LEPTOSPIRILLUM FERROOXIDANS PDF

2020-1-2  Oxidative leaching of metals by Thiobacillus ferrooxidans has proven useful in mineral processing. By using bioinformatic analysis of genomic sequences of the type strain of A. The effect of CO2 availability on the growth, iron oxidation and CO2-fixation rates of pure cultures of Leptospirillum ferriphilum and Acidithiobacillus ferrooxidans.

Get Price