Bioleaching Process for Copper Extraction from Waste in Alkaline and Acid Medium by Ivica Ristović 1,*, Darina Štyriaková 2,3, Iveta Štyriaková 2, Jaroslav Šuba 2 and Emilija Širadović 1 1 Faculty of Mining and Geology, University of Belgrade, Djusina 7, 11000 Belgrade, Serbia 2 ekolive, Americká trieda 3, 04013 Kosice, Slovakia 3
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The application of bioleaching of metal sulfides (MS) and its understanding have evolved over the last decades. The mobilization of metal cations from often almost insoluble minerals in ores by biological acidification, oxidation, and complexation processes is referred to as bioleaching, and its application is termed biomining, being now a worldwide established geobiotechnological process.
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2 Bioleaching of EWaste for Metal Recovery. Bioleaching is the microbemediated transformation or mobilization of metals from the ores or metal wastes into the lixiviant [ 10 ]. The abiotic factors that affect bioleaching are pH, temperature, substrate concentration, oxygen requirements, etc.
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Remediation by bioleaching. Bioleaching is a common term used for biomining, in which the microbes are used for metal extraction from lowgrade ores. It engages the mobilization of positively charged heavy metal ions from the insoluble ores by biological dissolution processes and biooxidation.
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Bioleaching is a simple and effective technology for metal extraction from lowgrade ores and mineral concentrates. Metal recovery from sulfide minerals is based on the activity of chemolithotrophic bacteria, mainly Thiobacillus ferrooxidans and T. thiooxidans, which convert insoluble metal sulfides into soluble metal ores and minerals can be treated by heterotrophic ...
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Bioleaching may be effectively used to extract nonferrous metals from sulfide ores and concentrates. At the same time, some minerals are refractory and their bioleaching rate is often comparatively low that does not allow the required metal extraction rate to be achieved. In the present work, we studied the twostage process, which included stages of biological and chemical leaching, to ...
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Spasova et al. (2006) examined the extraction of copper, gold, and silver from a heap consisting of five tons of polymetallic sulfide ore that had been crushed to less sizes than 10 mm. The main copperbearing mineral of the ore was chalcopyrite, while secondary copper sulfides, such as covellite and bornite, also were present.
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These processes have been applied to heap and tank leaching, nowadays termed biomining, but increasing concerns about the social acceptance of mining has also seen the reemergence of in situ leaching and quest for broader applicability beyond uranium and copper.
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Apr 24 2014. Bioleaching, or microbial ore leaching, is a process used to extract metals from their ores using bacterial microorganisms. The bacteria feed on nutrients in the minerals, causing the metal to separate from its ore. The metals commonly extracted using this process include gold, silver, zinc, copper, lead, arsenic, antimony, nickel ...
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The interaction between microorganisms and minerals was a hot topic to reveal the transformation of key elements that affecting bioleaching efficiency. Three typical lowgrade copper ores, the main copperbearing components of which were primary sulfide, secondary sulfide and highoxidative sulfide copper, were obtained from Dexing, Zijinshan ...
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The bioleaching process resulted in 98% (copper) and 82% (nickel) at 30 °C (160 rpm) within 72 h. ... (zinc), 64% (aluminum), 86% (copper), and 74% (nickel) were obtained. A higher copper extraction of 85% at 50 °C in 8 d by Sulfobacillus ... Kaksonen, Bioleaching of gold from sulfidic gold ore concentrate and electronic waste by ...
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Bioleaching is a useful tool to recover different metals from lowgrade ores and wastes. It has proved its benefits in terms of cost and environment. It is applied to the heap operation for the ...
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Since the copper grade is very low and the deposit contains significant amounts of arsenic, the traditional flotation and smelting process cannot be applied to extract copper economically and effectively, and in 1998 the mine operators began extracting copper using heap bioleaching (Ruan et al. 2006). Due to the relatively warm climate (average ...
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Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment; namely, water, air and microorganisms. In other words, bioleaching is the commercialization of the ability of certain bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals.
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Due to the ongoing scarcity of copper resources globally, the extraction of copper from waste rocks has become an unavoidable necessity. This study investigated the phytoextraction of copper from lowgrade chalcocite (LGC) ore using Tagetes sp. Therefore, the LGC and the garden soil mixtures, with different percentages, were utilized to achieve the optimum condition in 4 weeks. Mixing 50% LGC ...
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Alternatively, bioleaching (or biomining) by microorganisms is used to extract metals from ores by dissolving them into extremely acidic aqueous solution. Bioleaching is a natural process involving acidophilic bacteria and archaea, which have the ability to either oxidize metal sulfides or to oxidize reduced inorganic sulfur compounds (RISCs ...
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This paper provides an overview of hydrometallurgical copper extraction studies in which liquid extraction technology has been used with four copper deposits of different compositions. The sulfuric acid consumption rate and copper extraction efficiency, which are dependent on the initial content and forms of calcium compounds and other impurities in ore samples, were calculated, and the ...
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Now, miners aim to use bacteria or other newly developed chemicals to extract even more copper from that waste rock in a secondary leaching process. That could enable them to produce copper at ...
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Thionic bacteria facilitating bioleaching of sulfide ores were produced from sulfides and runoffs from the Allarechensky Deposit Dumps coppernickel ores. For further work in a bioreactor at 27 °C and steady aeration bacterial biomass with a cell number of 10 9 cells/mL was produced. A scaleup process was carried out during 1012 days on ...
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There are large quantities of such lowgrade ores especially copper ores, which can be processed profitably by bioleaching. Copper and Uranium are presently produced commercially by employing bioleaching process.
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The use of biotechnology to explore lowgrade ore deposits and mining tailings is one of the most promising alternatives to reduce environmental impacts and costs of copper extraction. However, such technology still depends on improvements to be fully applied in Brazil under industrial scale. In this way, the bioleaching, by Acidithiobacillus ferrooxidans, in columns and stirred reactors were ...
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Sengupta Sahana. Bioleaching is the extraction of specific metals from their ores through the use of bacteria. Bioleaching is a new technique used by the mining industry to extract minerals such ...
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