Bioleaching - Wikipedia

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,...

Leaching of Copper Ore with Thiobacillus ... - Personal.Psu.Edu

The illustration is an aerial photograph of a large dump-leaching facility at the Bingham Canyon copper mine operation near Salt Lake City, Utah. Copper ore too low in copper to smelt directly is brought to the leaching pits by truck. The copper is extracted by spraying the middens with water. Bacteria, principally of the genus...

Microbial Leaching of Ores - Annenberg Learner

Copper miners take advantage of this metabolic step during the microbial leaching of low-grade ores. Cu2S ... The mining industry has increased biological leaching techniques for various reasons, including environmental concerns related to smelting, the decline in the quality of ore reserves, and difficulties in processing.

Innovations in Copper: Mining & Extraction: Producing copper ...

Heap leaching of ore may involve mesophilic or thermophilic (high temperature) microorganisms, i.e., archaea, depending on the mineral species present and the physical chemistry of the .... These strains have been characterized, many by DNA sequencing, and listed in the major biological species indices of the world.

Copper Bioleaching in Chile - MDPI

Mar 16, 2016 ... The copper production in Chile is based mostly on the exploitation of ores containing copper ... of this biotechnology actually started in circa 1950, once bacteria involved in the leaching of copper .... namely “Development of Biological Processes and their Industrial Application to the Bacterial Leaching.

Microbial Leaching of Uranium Ore - InTechOpen

Sep 9, 2011 ... low-grade copper ore, and leached using an acidic ferric sulfate solution at the Elliot Lake. Mine, Ontario ... ferrooxidans with regard to their degree of resistance to the metals copper, nickel, uranium, ..... below, there are two broad categories of biologically-assisted mineral degrading processes. An ore or...

Exploitation of Bacterial Activities in Mineral Industry and ... - Hindawi

Nov 4, 2013 ... Some of the applications, such as biologically assisted leaching of copper sulfide ores, uranium ores, and biooxidation of refractory sulfide gold ores, are now established on the scale of commercial processes. A variety of other bioleaching opportunities exist for nickel, cobalt, cadmium, and zinc sulfide...

Microbial Leaching (Bioleaching, Biomining) - Environmental ...

The low grade ores are discarded in waste heaps which enter in the environment. The low grade ores contain significant amount of nickel, lead, and zinc ores which could be processed by microbial leaching. Bioleaching of uranium and copper has been widely commercialized. But large scale leaching process may cause...

Chemolithotrophic Bacteria in Copper Ores Leached at ... - NCBI - NIH

Extensive bacterial growth was observed when copper sulfide ores were leached with 0.6 N sulfuric acid. The bacterial population developed in this condition was examined by characterization of the spacer regions between the 16S and 23S rRNA genetic loci obtained after PCR amplification of the DNA extracted from the...

8 Microbial Leaching of Metals - Wiley-VCH

6.1 Commercial-Scale Copper Ore Bioleaching 208. 6.2 Reactor Bioleaching .... containing ores by biological methods was proposed. In 1947 ... 4 Principles of Microbial. Metal Leaching. 4.1 Leaching Mechanisms. Mineralytic effects of bacteria and fungi on minerals are based mainly on three principles, namely acidolysis...

Copper Mining Using Acidothiobacillus - microbewiki

Jul 23, 2011 ... The ores obtained from mining are crushed and piled up to 10 meters high atop plastic irrigation pads, whereupon water seeded with acid, called the lixiviant, is irrigated through the heaps and collected (Fig. 2). After performing the next steps to extract the copper dissolved in the leach liquor, it is recycled...

Mission 2015: Bioleaching

However a study by Mujeeb-ur-Rehman shows that 75 percent of the copper in the ore studied was leached in 144 hours. Leaching can be carried out in two stages that permit separate enhancement during each stage. The biological oxidation stage is fast and effective. In a one stage process, bacteria are broken down by...

Bioleaching: metal solubilization by microorganisms - Wiley Online ...

Bioleaching is a simple and effective technology for metal extraction from low-grade ores and mineral concentrates. Metal recovery from sulfide ..... on the interaction of biological and chemical oxida- ..... 2: solvent extraction for copper concentration; 3: collecting pond for the concentrated leaching solution; 4: electrowinning).

Chemical and biological leaching of enargite - Springer Link

Bacterial leaching is now recognized as a valuable alternative to process secondary copper sulfide ores and industrial applications of bacterial heap leaching have proved to be economically attractive (Jo et al., 1991). Nevertheless, the application of this process to primary copper sulfides such as chalcopyrite have been...

New methods of extracting copper - Bioleaching and Phytomining ...

Feb 21, 2016 ... This animation discusses the extraction of copper from low grade ores using phytomining & bioleaching.

bacterial leaching of sulfide ores - Geologian tutkimuskeskus

Bacterial leaching o f sulfice ores: Mineral altemiiun, dissolution, and Intemctions. Geolog ical .... tec hnique has also been evaluated for the ex traction of copper from low-grade sulfide ores. Due to the selectivity of the ... Reactor leaching techniques are widely studied for biological pretreatment of gold bearing concentrates.

an investigation of leaching chalcopyrite ore - QSpace - Queen's ...

Van der Meer (2009) conducted laboratory column biological leaching tests and found that the effect of temperature on chalcopyrite ore leaching was even more dramatic, Table 2.2. Table 2.2: Effect of Temperature on Copper Extraction from Chalcopyrite Ore in Biological Leaching. Column Tests (van der Meer, 2009). Test.

hydrometallurgy – an alternative and a chance for ... - ResearchGate

range of chemical and biological processes for copper recovery from sulphide concentrates have been developed (Dreisinger ... atmospheric or pressure leaching, and chemical or biological in the leaching process. There are ... some copper heap leach - SX/EW process plants are running out of ore feed. These plants have.

Acid leaching of oxide–sulfide copper ore prior the flotation - doiSerbia

Jul 17, 2014 ... of such mixed ores by the existing concentration technologies leads to a substantial copper losses (<60%). ... copper ore is proposed. Keywords: oxide–sulfide copper ore, leaching, flotation, increase of copper recovery. ..... Options for biological and chemical extraction of cop- per, Hydrometallurgy 83...

Bacterial leaching kinetics for copper dissolution from a lowgrade ...

Bio-leaching of copper (0.3%) from a low grade Indian chalcopyrite ore of Malanjkhand copper mines, using a native mesophilic isolate predominantly ... enhance the leaching of sulfide minerals, attempts were made to find kinetic equations capable of representing the biological oxidation of Fe(II) and elemental sulfur by...

Percolation Leaching of a Chalcopyrite-Bearing Ore at ... - CDC stacks

Copper extraction from ore at ambient temperature ••••••••••••••••••. Ferric iron concentration in leach solution during ambient temperature leaching . .... bacterial assays of leach solution samples, dense suspensions of thermophil- ic bacteria for ore inoculations, and continued advice and suggestions on the biological aspects.

The Catalytic Role of Acidithiobacillus ferrooxidans for ... - MedCrave

Oct 25, 2017 ... industrial bacterial leaching is played by the acidophilus bacteria ... biological treatment of resource from mining and metallurgy of copper in order ... ore laterite [32]. Biological copper is generally associated with the three types of ligand: the chains of histidine (His), cysteine (Cys), and methionine. (Met)...

Microbiological Mining

The central role of bacteria in the leaching of copper from low-grade ore long went unrecognised. ... are generally less energy-intensive and less polluting than most nonbiological ones, and so the role of biological technology in mining, ore processing and waste-water treatment is likely to become increasingly important.

Mineral bio-processing: an option for recovering strategic ... - prometia

A sub-division of hydrometallurgy (“the use of aqueous chemistry for the recovery of metals from ores, concentrates, and recycled or residual materials”) that uses microorganisms in one or more stages of a process. • Usually (but not always) constrained to operate in conditions where microorganisms are metabolically active...

a comparison of biological and chemically induced leaching ...

Many thanks to Prof. John Ralston and my supervisors Prof. Andrea Gerson, Dr. Joan Thomas and. Frank Peddie for the opportunity to research a topic which has held a fascination for me since my early career association with copper sulfide bioleaching with low grade Bougainville ore. During this study I have received...

LEACHING OF LOW-GRADE COPPER ORES - JOURNAL OF ...

This paper deals with the investigation of column leaching of low-grade ores from the copper mine Cerovo,. Serbia (the approximate Cu content in the ore ranges from 0.2 - 0.3 % with >10 % copper in the form of oxide minerals). The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics...

STUDIES ON THE CURING AND LEACHING ... - Open Collections

accelerate the extraction kinetics of copper ores and is widely used in copper operations. The curing process involves ...... to 8.4) found from experimental sulfuric acid curing of the Zaldivar mixed copper ore............ 95 ...... D. Dreisinger, Copper leaching from primary sulfides: Options for biological and chemical extraction of...

Role of Acidothermophilic Autotrophs in Bioleaching of ... - NOPR

Jan 13, 2003 ... The mining of copper, uranium, molybdenum, zinc, silver, gold, etc, from their sulphide ores is successfully possible with these ... Keywords: acidothermophiles, bioleaching, mineral sulphide ores, bio-oxidation, chemolithotrophs .... biological leaching rates of secondary Cu-oxide and. Cu-sulphide minerals.

Microbial recovery of metals from solids - RERO DOC

University of Zuërich, Institute of Plant Biology, Department of Microbiology, Zollikerstrasse 107, CH-8008 Zuërich, Switzerland b. University of Zuërich, Institute of ... Microbial leaching processes are currently used for the winning of gold and copper from low-grade ores (`bioleaching'). Solid industrial waste materials such as...

SMALL SCALE LEACHING OF COPPER ORES - 911 Metallurgist

May 23, 2017 ... The treatment of copper ores, both oxides and sulfides by means of flotation, hydrometallurgy or other processes has been well established for many years. Flotation has been applied generally to the treatment of sulfide ores, both in small and large scale operations. Hydrometallurgical methods alone or in...

Copper Recovery from Silicate-Containing Low-Grade Copper Ore ...

plex ores and tailings11–14. There are many studies related to the development of hydrometallurgical routes to extract copper from low-grade sulfide ores by atmospheric leaching and biological leaching processes15–18. Authors have concluded that both direct atmospheric and biological leach- ing of copper from its ore...

Use of bioreactors in the leaching of an oxidized copper ore

Abstract&— Copper recoveries using two methodologies of acid leaching of a low-grade ore are reported in this work. The ore, abounding in .... This performance can be explained considering that initial biological acid production is consumed during the initial copper solubilization of oxidized species. It makes pH quickly...

BBC - GCSE Bitesize: The future of copper

The future of copper. We are running out of copper-rich ores. Research is being carried out to find new ways to extract copper from the remaining low-grade ores, without harming the environment too much. This research is very important, as traditional mining involves huge open-cast mines that produce a lot of waste rock.

Mineralogy, petrology, and chemistry studies to evaluate oxide ...

In recent years, as a result of biological, environmental, and economic considerations, available copper in copper oxide ores that could not be recovered by pyrometallurgical methods was accumulated in so-called oxide dumps. Suitable material is treated with dilute sulfuric acid in a heap-leaching process, whereupon the...

A Review on Novel Techniques for Chalcopyrite Ore Processing

Jan 1, 2012 ... applied to the rest of the world's primary copper production. Hydrometallurgy consists of crushing, leaching. (non-oxidation leaching, atmospheric leaching and pressure leaching), solvent extraction and electrowinning. Hydrometallurgical processing can be effectively applied to oxidized ores containing...

bio leaching - SlideShare

Jan 15, 2015 ... Introduction Bioleaching is the simple and effective technology for metal extraction from low grade ores and mineral concentrate by the use of micro organisms. Commonly used microorganisms are: Mesophiles Moderately thermophilic bacteria extremophiles; 3. History Copper recovery from...

Microbial communities in four industrial copper dump leaching ...

\vaslc's anti l~n'¢v gradc copper t)rcs. Introduction. At the present time, the biological leaching of copper from low-grade ores is applied on indus- trial scale in several countries. The leaching is connected with the action of chemolithotrophic bacteria capable of oxidizing sulphide minerals, ferrous iron and elemental sulphur.

Copper recovery using leach/solvent extraction ... - SAIMM

practical aspects of biological leaching had been discussed23. However, copper recovery from a high-grade sulphide ore by bacteria-assisted heap leaching was not considered econom- ically viable until SMP showed that the total copper recovery from the chalcocite/bornite portion of their mixed oxide sulphide ore could...

Advances in high-temperature heap leaching of refractory copper ...

Heap leaching has also been extended to the treatment of secondary sulphide copper ores, where oxidative conditions are generated in aerated heaps by the bacterially-assisted oxidation of ferrous iron to ferric .... Being biologically driven, the process requires the maintenance of conditions suitable for bacterial growth.

3 Technologies in Exploration, Mining, and Processing ...

The major components can also be combined innovatively, such as when in-situ leaching of copper is undertaken after conventional mining has rubblized ore in ..... Although industry currently supports the development of most new geochemical and geophysical technologies, basic research on the chemistry, biology, and...

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