Producing copper nature's way: Bioleaching - Copper Development ...
An associated process is biooxidation. This is the oxidation of sulfide minerals associated with but not necessarily part of the mineral of interest to be extracted. Bioleaching is used today in commercial operations to process ores of copper, nickel, cobalt, zinc and uranium, whereas, biooxidation is used in gold processing...Read More
Bioleaching - Wikipedia
The process for copper is very similar, but the efficiency and kinetics depend on the copper mineralogy. The most efficient minerals are supergene minerals such as chalcocite, Cu2S and covellite, CuS. The main copper mineral chalcopyrite (CuFeS2) is not leached very efficiently, which is why the...Read More
Copper Bioleaching in Chile - MDPI
Mar 16, 2016 ... 2. Bioleaching of Sulfide Minerals. 2.1. Bioleaching Process. There is evidence that ancient people learned how to recover naturally bioleached copper. One example is found at the time of the Roman Empire or in Rio Tinto, Spain, back in the 18th century, where there is evidence that copper was recovered...Read More
Copper Bioleaching in China: Review and Prospect - MDPI
Jan 23, 2018 ... This paper reviews the exploration and application of copper bioleaching in China. Two typical bioleaching applications and technological processes, bioheap leaching at the Zijinshan Copper Mine and bioheap leaching at the Dexing Copper Mine, are introduced. The considerable research completed by...Read More
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.Read More
bio leaching - SlideShare
Jan 15, 2015 ... First industrial gold bioleaching plant in 1980´s Nowadays about 40 plants in industrial use for copper, gold, zinc, cobalt, uranium. 4. Features of ... For commercial extraction of metal by bioleaching the process is optimized by controlling the PH, temperature, humidity, o2 and co2 concentrations. These...Read More
Copper Mining Using Acidothiobacillus - microbewiki
Outline of the heap leaching process. After irrigating the heap with a lixiviant, the copper-containing leach liquor is collected and processed by solvent extraction and electrowinning to yield copper metal. (Rawlings 2002). Modern biomining processes are large-scale operations...Read More
BBC - GCSE Bitesize: The future of copper
Phytomining, bioleaching and scrap iron. Some plants absorb copper compounds through their roots. They concentrate these compounds as a result of this. The plants can be burned to produce an ash that contains the copper compounds. This method of extraction is called phytomining. Some bacteria absorb copper...Read More
Progress in bioleaching: applications of microbial processes by the ...
Oct 18, 2003 ... Introduction and historical perspective. Application of microbial processes by the mineral indus- try—biohydrometallurgy—predates the understanding of the role of microorganisms in metals extraction, com- monly referred to as bioleaching. Copper recovery from mine waters can be dated to the fifteenth or...Read More
Application of bioleaching to copper mining in Chile | Acevedo ...
May 15, 2013 ... Currently, heaps are widely used in the large-scale bioleaching of copper. They are employed for processing low-grade ores non apt for concentration and smelting or as an alternative to smelting when the overall economy of the process is favourable. This can be the case for secondary minerals such as...Read More
Bioleaching: metal solubilization by microorganisms - Bosecker ...
5Leaching techniques. The bioleaching of minerals is a simple and effective technology for the processing of sulfide ores and is used on a technical scale mainly for the recovery of copper and uranium. The effectiveness and economics of microbial leaching processes depend highly on the activity of the bacteria and on the...Read More
Bioleaching: metal solubilization by ... - Wiley Online Library
Greeks and Romans extracted copper from mine water more than 2000 years ago. However, it has been known only for about 50 years that bacteria are mainly responsible for the enrichment of metals in water from ore deposits and mines . The solu- bilization process is called bioleaching and occurs in nature wherever...Read More
Bioleaching - BioMineWiki
May 13, 2008 ... Bioleaching is a process described as "the use of microorganisms to transform elements so that the elements can be extracted from a material when water is filtered trough it". ... Methods. Heap leaching is the most common method for bioleaching and is mainly used for secondary copper ores. Stirred tank...Read More
Kids.Net.Au - Encyclopedia > Bioleaching
When the pH of this solution rises, as a result of dilution by fresh water, these ions precipitate, forming "Yellow Boy" pollution. For these reasons, setup of bioleaching must be carefully planned, since the process can lead to biosafety failure. Currently it is more economical to smelt copper ore rather than to use bioleaching,...Read More
Bioleaching of copper from samples of old flotation tailings (Copper ...
As copper sulfides are acid soluble, copper from flotation tailings can be leached by sulfuric acid solutions.4–6 Another approach for the recovery of copper from tailings would include the use of acidophilic iron oxidizing micro- organisms. This process is referred to as “bioleaching”.8 It is generally known that many...Read More
Biomining: How microbes help to mine copper - BBC News - BBC.com
Mar 21, 2012 ... She explains that if a mining site is left alone, microorganisms would eventually liberate copper from rocks, but it could take hundreds of years. To speed up the process in a biomining lab, scientists use bioleaching. Ores are placed into acid, and then researchers introduce bacteria that change the solution...Read More
EXTRACTION OF COPPER FROM SOLUTION AFTER ...
Oct 25, 2013 ... Well known is ap- plication of biohydrometallurgical methods in recovery process of metals (such as Cu, Au, Ni, U, Zn, Pb) Over the past few years bioleaching–solvent extraction–elec- trowinning (BL–SX–EW) process has been conducted in hydrometallurgical production of copper from low grade ores.Read More
Bioleaching of copper via iron oxidation from chalcopyrite at ...
Citation: KARIMI, G.R., ROWSON, N.A. and HEWITT, C.J., 2010. Bi- oleaching of copper via iron oxidation from chalcopyrite at elevated temper- atures. Food and Bioproducts Processing: Official Journal of the European. Federation of Chemical Engineering: Part C, 88 (1), pp.21-25. Additional Information: • This article was...Read More
Mineralogical Characterization of Chalcopyrite Bioleaching ...
However, the chalcopyrite copper leaching rate is slower than other copper minerals such as chalcocite (Cu2S), covellite (CuS), and bornite (Cu5FeS4) . Initial rapid leaching rates decline with time, and bioleaching processes release only part of the copper due to so-called passivation reactions at the mineral...Read More
Synergy between Rhizobium phaseoli and Acidithiobacillus ...
Jan 10, 2016 ... This study investigates the synergy of Rhizobium phaseoli and Acidithiobacillus ferrooxidans in the bioleaching process of copper. The results showed that additional R. phaseoli could increase leaching rate and cell number of A. ferrooxidans. When the initial cell number ratio between A. ferrooxidans and...Read More
influence of physical and chemical factors on ... - Semantic Scholar
Acidithiobacillus. ferr ooxidans was used to recover copper from printed circuit boards (PCBs). The purpose of this study was to evaluate the influence of some physical and chemical factors (pH, oxidation-reduction potential, quantities of bacteria) on bioleaching process and determine efficiency of copper transfer from solid.Read More
The Use of Thiobacillus Ferrooxidans Bacteria in the Process of ...
Dayton Development Corporation and Anacondo Corpora- tion are also involved in copper recovery by bioleaching techniques . Thiobacillus ferrooxidans bacteria, which grow on a wide spectrum of substrates including the reduced forms of metals (Fe2+, Sn2+, Sb3+, U4+) or reduced forms of inorganic sulphur (S°, S2-,...Read More
GCSE CHEMISTRY - Extraction of Copper - Thermal Decomposition ...
The Extraction of Copper by Thermal Decomposition, Bioleaching and Phytomining.Read More
The shift of microbial communities and their roles in sulfur ... - Nature
Oct 4, 2016 ... SCIENTIFIC REPORTS | 6:34744 | DOI: 10.1038/srep34744. Iron and sulfur are major energy sources for microorganisms in copper ore bioleaching system, and bioleach- ing process always companied with transformation of Fe&S compounds. The metabolism and cycling of Fe and. S have been identified...Read More
Heap Bioleaching Of Chalcopyrite Copper Ore - MINTEK | MINTEK
As near-surface oxide orebodies are depleted, mines are having to process deeper sulfide ores that are lower in metal grade and metallurgically more complex. Modern technologies that are simple, cost effective and environmentally sound are required for their extraction. In many cases, bioleaching is the most suitable...Read More
biological generation of sulphuric acid for bioleaching of copper ...
leaching processes, in particular by leaching oxide copper ores with sulphuric acid and subsequent downstream processing of the leachate through solvent extraction followed by the electrowinning of copper (SX-EW). At present, heap leaching is a well-known industrial process for the treatment of minerals with oxidized...Read More
A Mintek perspective of the past 25 years in minerals bioleaching
Commercial success started with the treatment of refractory gold concentrates using mesophilic micro-organisms, followed by the development of tank bioleaching processes for the treatment of base metal concentrates. This was, initially, a mesophilic process with limited potential for recovery of copper from chalcopyrite...Read More
Bioleaching is the extraction of metals from ores ... - Shodhganga
Page 4 for uranium biomining from worked-out mines in Canada in 1970s. Over the past 20 years this technology has blossomed with annualized world copper production from the process increasing from 0.2% to approximately. 8-10%. Bioleaching of copper in heaps was first recorded at the Rio Tinto mine in 17th century.Read More
Bioleaching of copper mining residues by Aspergillus niger
Abstract A study was initiated to determine the possibility of using the fungus Aspergillus niger for bioleaching and then to identify and evaluate the parameters that affect this process. An oxidized mining residue containing mainly copper (7240 mg/kg residue) was studied. Sucrose and mineral salts medium were initially...Read More
Bioleaching of different copper sulphide minerals and their ...
This paper investigated the bioleaching of different copper sulphide minerals. The bioleaching experiments show that the order of the copper bioleaching rates of four copper sulphide minerals, regardess of whether the optimum conditions or the initial ferrous iron concentration of 0 g L− 1, was identical: djurleite> bornite>...Read More
Thermophilic Bioleaching of Chalcopyrite Concentrates ... - CiteSeerX
Presented at Alta 2002 Nickel/Cobalt 8 - Copper 7 Conference, Perth, Australia. Thermophilic Bioleaching of Chalcopyrite Concentrates with GEOCOAT.. Process. Todd J. Harvey. GeoBiotics, LLC firstname.lastname@example.org. Nick Holder, Tracey Stanek. Lakefield Research Africa (PTY) Ltd email@example.com,.Read More
Impact of solvent extraction organics on bioleaching ... - AIP Publishing
Abstract. Solvent extraction organics (SX organics) entrained and dissoluted in the raffinate during copper SX operation, can impact bioleaching in case of raffinate recycling. The influence of SX organics on bioleaching process by. Acidithiobacillus ferrooxidans (At. ferrooxidans) has been investigated. The results showed...Read More
Application of bioleaching to copper mining in Chile - Bioline ...
May 15, 2013 ... Chile plays an important role in the development and application of bioleaching of copper ores, and in the following sections a general panorama of the past, present and future of this technology in Chilean mines is presented, together with a discussion of the main variables involved in the process.Read More
Quantitative Monitoring of Microbial Species during Bioleaching of a ...
Monitoring of the microbial community in bioleaching processes is essential in order to control process parameters and enhance the leaching efficiency. ... the leaching of copper concentrate, housing a consortium of acidophilic, moderately-thermophilic bacteria, relevant in several bioleaching operations, served as a model...Read More
Rock-Eating Bacteria "Mine" Valuable Metals - National Geographic
Nov 5, 2008 ... The mineral-crunching microorganisms help leach valuable metals, such as copper, in a cheaper and more environmentally friendly way. ... When the life-forms break down the matter through metabolism, they squeeze out metal ores or concentrates combined with sulfur in a process called bioleaching.Read More
8 Microbial Leaching of Metals - Wiley-VCH
5 Microbial Diversity in Bioleaching Environments 200. 6 Case Studies of Bioleaching Applications 208. 6.1 Commercial-Scale Copper Ore Bioleaching 208. 6.2 Reactor Bioleaching of Fly Ash 210. 6.3 Shake Flask ... natural sciences, Plinius describes how copper minerals are obtained using a leaching process. (KÖNIG...Read More
PROCESS FOR BIOLEACHING OF COPPER ... - Inapi
PROCESS FOR BIOLEACHING OF COPPER CONCENTRATES. WO2000023629. País: Australia. Solicitante: Mintek; Bactech. (Australia) PTY. Limited. Fecha: 2000 / 04 / 27. Inventores:...Read More
an overview of sustainable copper recovery method via bioleaching
Nov 10, 2016 ... Zambia needs to focus its effort on research in bioleaching process and its application to achieve sustainable copper recovery within the context of economical, ecological and social sustainability. Index Terms- Bioleaching, Copper Extraction, Sustainable Mining, Mining in Zambia. I. INTRODUCTION.Read More
Bioleaching Provides Better Alternative to Copper Smelting |
Jan 21, 2015 ... This latter reaction is the foundation for a process called bioleaching, which allows mining companies to treat nearly insoluble sulfides and oxides via hydrometallurgy, as opposed to the more conventional methods such as smelting. Since copper sulfide minerals are almost insoluble in acids, metal...Read More
Microbial Bioremediation | Boundless Microbiology - Lumen Learning
ore leaching: The process of recovering metals from ores by using a number of different techniques. Microbial ore leaching (bioleaching) is the process of extracting metals from ores with the use of microorganisms. This method is used to recover many different precious metals like copper, lead, zinc, gold, silver, and nickel.Read More