leaching copper ferrooxidans

  • EPS contact leaching mechanism of chalcopyrite

    Seen from Fig.5, the copper dissolution rate decreases and copper concentration increases with increasing time. Dissolution of chalcopyrite in the non inoculated experiments with abiotic control and with abiotic control with EPS is mainly due to the chemical leaching with low copper extraction.

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  • What is Bioleaching? (with pictures) wisegeek

    Dec 29, 20180183;32;Other metals that are commonly extracted via bioleaching include silver, zinc, copper, lead and uranium. Uses Special Microorganisms. This process works because of how special microorganisms act on mineral deposits. These microorganisms are catalysts to speed up natural processes in the ore.

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  • Comparsion of bioleaching of copper sulphides by

    higher the leaching rate of copper sulphides, the greater the density of bacteria absorbed on the surface of minerals. Key words Bioleaching, copper sulphides, Acidithiobacillus ferrooxidans, cell density, copper extraction. INTRODUCTION Bacterial heap leaching of

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  • Thiobacillus Ferrooxidans Hydrometallurgy Leaching in

    Assuming that there is an iron sulphide that you will be leaching, you should see the pH go down to the hydrolysis pH of iron (1.8 or so) and stay there. Let it sit for about a week so that the bacteria adapts through a number of generations. The adapted bacteria will leach your ore up to an order of magnitude faster than the unadapted bacteria.

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  • LEACHING OF CHALCOPYRITE WITH THIOBACILLUS FERROOXIDANS

    The rate of leaching of chalcopyrite by Thiobacillus ferrooxidans has been greatly accelerated by using shaken flasks in place of stationary bottles or percolators.

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  • The Use of Thiobacillus Ferrooxidans Bacteria in the

    The use of Thiobacillus ferrooxidans bacteria in the process of copper and iron leaching from chalcopyrite coming from Kotlina Ktodzka was investigated. The influence of the mineral content in the leaching solution

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  • Copper leaching from waste electric cables by

    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 2), the initial ferric iron concentration

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  • Bioleaching of Rare Metals from Manganese Nodules by

    For both the microbial system and the control culture containing no T.ferrooxidans, copper and nickel exhibited close to 100% leaching in two weeks and less than 5% for iron and manganese. On the other hand, leaching of cobalt was markedly accelerated in the microbial system reaching 50% in two weeks compared with the sterile control.

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  • Synergy between Rhizobium phaseoli and Acidithiobacillus

    At the end of this experiment, the leaching rate of group A was 22.3%, which is 6.1% higher than that in the control group 16.2%, proving that A. ferrooxidans could promote copper leaching. Additional R. phaseoli could further raise the leaching rate to 29%, especially in group C, where the initial A. ferrooxidans / R. phaseoli cell number ratio was 2 1.

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  • Leaching of chalcopyrite by Thiobacillus Thiobacillus

    Leaching of oxidized copper ore by T. ferrooxidans NB 102 Since oxidized copper ore was devoid of sulphur and contained 0.3% total iron, it was felt necessary to supplement it with chalcopyrite and sulphur as energy sources for T.

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  • (PDF) Bioleaching of low grade copper sulfide ores by

    The bioleaching of chalcopyrite in shake flasks was investigated by using pure Acidithiobacillus ferrooxidans and mixed culture isolated from the acid mine drainage in Yushui and Dabaoshan Copper

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  • ERIC Leaching of Copper Ore by Thiobacillus Ferrooxidans

    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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  • Bioleaching of low grade copper sulfide ores by

    Bioleaching of low grade copper sulfide ores by Acidithiobacillus ferrooxidans and Acidithiobacillus thiooxidans WANG Jun() 1, 2, ZHU Shan() , ZHANG Yan sheng()1, 2, ZHAO Hong bo()1, 2, HU Ming hao()1, 2, YANG Cong ren() 1, 2, QIN Wen qing()1, 2, QIU Guan zhou() 1.

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  • Copper Mining Using Acidothiobacillus microbewiki

    The isolation of copper metal from leach liquor is a two step process ( Copper Extraction Techniques ). The leach liquor obtained after heap irrigation has a very low concentration of copper dissolved into it, around 0.5 2.0 g/L.

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  • Leaching of chalcopyrite by Thiobacillus thiooxidans and

    The highest copper release, 61% of total, occurred in flasks having oxidized copper ore, sulphur and calcopyrite (111, by weight) and inoculated withT. ferrooxidans. Supplementation used in these tests resulted in nearly six times more solubilization as compared to tests conducted without supplementation.

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  • ERIC Leaching of Copper Ore by Thiobacillus Ferrooxidans

    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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  • Gold amp; Copper Bioleaching 911metallurgist

    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.

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  • Column bioleaching of low grade copper ore by

    In the mesophilic column bioleaching system, a copper extraction of 20.11% and 14.87% was achieved by a mixed bacterial culture and pure A. ferrooxidans culture respectively in 117 days including 15 days acid pre leaching stage and 102 days bioleaching stage. The pH value of the leaching solution played a critical role in accelerating low grade copper ore dissolution in the whole process.

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  • extraction of gold by thiobacillus whitehillstree

    Using Bacteria such as Acidithiobacillus ferrooxidans to leach copper from mine tailings has improved recovery rates and. Contact US Biorecovery of gold NOPR. Adding. Thiobacillus ferrooxidans into the thiourea leaching solution produces a 20% increase in the

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  • Minerals Free Full Text Enhancing the Leaching of

    Chalcopyrite is the richest copper sulfide mineral in the world, but it is also the most resistant to biohydrometallurgical processing. To promote the bioleaching of chalcopyrite, a nonionic surfactant, t octyl phenoxy polyethoxy ethanol (Triton X 100), was employed in this paper. Action of Triton X 100 in chalcopyrite leaching using Acidithiobacillus ferrooxidans was explored in shake flasks.

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  • The Use of Thiobacillus Ferrooxidans Bacteria in the

    The use of Thiobacillus ferrooxidans bacteria in the process of copper and iron leaching from chalcopyrite coming from Kotlina Ktodzka was investigated. The influence of the mineral content in the leaching solution

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  • Isolation of Acidithiobacillus ferrooxidans strain Z1 and

    An A. ferrooxidans strain with effective ferrous ion oxidation rate and high copper leaching efficiency was isolated. The extraction of copper was mainly through the indirect oxidation process via ferric ions biogenerated by A. ferrooxidans .

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  • Chalcopyrite Leaching by Thermophilic Bacteria

    Hydrometallurgy offers innovations in copper dump leaching, new developments in in situ leaching of copper and heap leaching uranium and improved schemes for leaching of metal concentrates. Although increased research effort has produced techniques which are now commonly used in extraction of copper and uranium, techniques for extraction of recalcitrant chalcopyrite have not been refined.

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  • Effect of amino acids on bioleaching of chalcopyrite ore

    ferrooxidans. Efficiency of microbial leaching of chalcopyrite by T. ferrooxidans was investigated in the presence of L aspartic acid, L glutamic acid, L histidine and L serine. The bioleaching of copper ion (Cu2+) from the low grade ore increased significantly in the presence of L serine. Although the leaching

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  • Interfacial activity and leaching patterns of

    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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  • Bioleaching

    Bioleaching is the extraction of metals from their ores through the use of living organisms.This is much cleaner than the traditional heap leaching using cyanide. Bioleaching is one of several applications within biohydrometallurgy and several methods are used to recover copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt.

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  • Journal of Spectroscopy Hindawi Publishing Corporation

    In order to improve copper leaching efficiency from the flexible printed circuit board (PCB) by Acidithiobacillus ferrooxidans, it is necessary to quantitatively measure the bacteria bioleaching copper under extreme acidic condition from flexible PCB.

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  • Leaching of chalcopyrite by Thiobacillus thiooxidans and

    Leaching of oxidized copper ore by T. ferrooxidans NB 102 Since oxidized copper ore was devoid of sulphur and contained 0.3% total iron, it was felt necessary to supplement it with chalcopyrite and sulphur as energy sources for T. ferrooxidans.

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  • Biomining

    Using Bacteria such as Acidithiobacillus ferrooxidans to leach copper from mine tailings has improved recovery rates and reduced operating costs. Moreover, it permits extraction from low grade ores an important consideration in the face of the depletion of high grade ores.

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  • Leaching of Ni and Cu from Mine Wastes (Tailings and Slags

    The objective of this work is to evaluate the acidic and biological leaching of tailings containing Ni/Cu from a flotation and smelting plant. Acidithiobacillus ferrooxidans, strain LR, was used for bioleaching at pH 1.8 and chemical controls were run parallel to that. The acidic leaching was done within 48

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  • Evaluation of Leptospirillum ferrooxidans for Leaching

    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 thiooxidans.

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  • Anaerobic leaching of covellite by Thiobacillus ferrooxidans

    Copper dissolution from a sulfide ore (with covellite as the main copper phase) was investigated in cultures of Thiobacillus ferrooxidans or Thiobacillus thiooxidans and in abiotic controls.

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  • Microbial Leaching (Bioleaching, Biomining

    Chalcocite is oxidized to soluble form of copper (Cu 2+) and covellite by T. ferrooxidans. Cu 2 S + O 2 CuS + Cu 2+ + H 2 O Covellite is oxidized to copper sulphate chemically or by bacteria. 2CuFeS 2 + 8189; O 2 + H 2 SO 4 2CuSO 4 + Fe 2 (SO 4) 3 + H 2 0 Thereafter, strictly chemical reaction occurs which is the most important reaction in copper leaching.

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  • BIOLEACHING OF LATERITIC NICKEL ORE USING

    BIOLEACHING OF LATERITIC NICKEL ORE USING CHEMOLITHOTROPHIC MICRO ORGANISMS (Acidithiobacillus ferrooxidans) A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Leaching of copper was practiced in Norway

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  • Leaching Heavy Metals from Contaminated Soil by Using

    Leaching with T. ferrooxidans strains resulted in total extraction of Cd, Co, Cu, and Ni. With sulfur oxidizing bacteria amp;gt; 80% of Cd, Co, Cu, and Zn was mobilized from rainwater sludge. Pb and Ba were not detected in the leachate, given the insolubility of their sulfate compounds.

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  • Evaluation of Leptospirillum ferrooxidans for Leaching

    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 thiooxidans.

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  • Microbial Leaching (Bioleaching, Biomining

    T. thiooxidans and T. ferrooxidans have always been found to be present in mixture on leaching dumps. Thiobacillus is the most extensively studied Gram negative bacillus bacterium which derives energy from oxidation of Fe 2+ or insoluble sulphur.

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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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