BIOLEACHING AND BIOMINING PDF

July 17, 2020   |   by admin

Microbial Leaching (Bioleaching, Biomining). Microbial leaching is the process by which metals are dissolved from ore bearing rocks using microorganisms. Biomining is a technique of extracting metals from ores and other solid materials typically using . Additional capabilities include the bioleaching of metals from sulfide materials, phosphate ore bioprocessing, and the bioconcentration of metals. 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 .

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In place bioleaching of copper in Chile Source: For biomining specialized microorganisms are used in order to recover valuable metals from ores via bioleaching. The ore minerals of the metals copper, nickel, cobalt, and zinc occur in nature mainly as metal sulfides.

BGR – Metal Bioleaching (Biomining)

Bioleaching is the biological conversion of an insoluble metal compound to a water soluble form. During metal sulfide oxidation sulfur compounds and elemental sulfur occur. These are microbially oxidized to sulfuric acid, whereby the acid milieu is generated.

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In industrial bioleaching biomining three technical processes are differentiated: Heap or biominibg bioleaching, tank bioleaching, in situ or in place bioleaching.

Today the recovery of copper from sulfide ores is the most important industrial application, and a significant proportion of the world copper production originates from heap or dump bioleaching.

Furthermore biomining is applied for the recovery of gold, cobalt, nickel, zinc and uranium.

Bioreactor for metal bioleaching in the geomicrobiology laboratory of BGR Source: Via targeted research and further development of bioleaching valuable substances such as economically critical metals could be recovered from mine waste hioleaching mine tailingscomplex ores, non-sulfidic biominijg such as laterites and manganese nodules, as well as industrial residues such as ashes, sludges, slags and even electronic waste.

For this, processes already exist in laboratory scale and further work is carried out in the geomicrobiology laboratory of BGR, mainly within the frame of third-party funded projects. BGR For biomining specialized microorganisms are used in order to recover valuable metals from ores via bioleaching.

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BGR Via targeted research and further development of bioleaching valuable substances such as economically critical metals could be recovered from mine waste dumps mine tailingscomplex ores, non-sulfidic ores such as laterites and manganese nodules, as well as industrial residues such as ashes, sludges, slags and even electronic waste. Composition EcoMetals – Innovative eco-efficient biohydrometallurgy process for the recovery of strategic and rare metals: Jeannette Marrero Coto, Literature: Enhanced chalcopyrite dissolution in stirred tank reactors by temperature increase during bioleaching.

Implementation of biological and chemical techniques to recover metals from copper-rich leach solutions. Effect of elevated pressure on ferric iron reduction coupled to sulfur oxidation by biomining microorganisms.

Metal Bioleaching (Biomining)

Electrochemical applications in metal bioleaching. Recent Advances in Acidophile Microbiology: Recovery of nickel and cobalt from laterite tailings bioleacying reductive dissolution under aerobic conditions using Acidithiobacillus species.

Geobiotechnology I – Metal-related Issues, A.