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microorganisms capable of oxidizing iron ore

microorganisms capable of oxidizing iron ore

16.6A: Microbial Ore Leaching - Biology LibreTexts

Bacteria perform the key reaction of regenerating the major ore oxidizer which in most cases is ferric iron as well as further ore oxidation. The reaction is performed at the bacterial cell membrane. In the process, free electrons are generated and used for the reduction of oxygen to water which produces energy in the bacterial cell.

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microorganisms capable of oxidizing iron ore

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Iron-oxidizing bacteria - Wikipedia

Iron-oxidizing bacteria are chemotrophic bacteria that derive the energy they need to live and multiply by oxidizing dissolved ferrous iron.They are known to grow and proliferate in waters containing iron concentrations as low as 0.1 mg/L. However, at least 0.3 ppm of dissolved oxygen is needed to carry out oxidation.

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microorganisms capable of oxidizing iron ore

microorganisms capable of o idizing iron ore. microorganisms capable of oxidizing iron ore - indovision. Biomining (Mineral Bioleaching, Mineral · Summary Biomining is the use of autotrophic, acidophilic, iron-, and sulfur-oxidizing microorganisms to .

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Microbial Bioremediation | Boundless Microbiology

The critical reaction is the oxidation of sulfide by ferric iron. The main role of the bacterial step is the regeneration of this reactant. Copper leaching has a very similar mechanism. Microorganisms Capable of Ore Leaching. Bioleaching reactions industrially are performed by many bacterial species that can oxidize ferrous iron and sulfur.

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Characteristics and adaptability of iron- and sulfur .

Although some microorganisms are capable of using both energy sources, a combination of iron-oxidizing and sulfur-oxidizing microbes often works best. The production of sulfuric acid and the need to keep the most important mineral-oxidizing agent (ferric iron) in solution means that the organisms

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Methods of Metal Recovery by Microorganisms (2 Methods)

The bacteria which are naturally associated with the rocks can lead to bioleaching by one of the following ways. 1. Direct action of bacteria on the ore to extract metal. 2. Bacteria produce certain substances such as sulfuric acid and ferric iron which extract the metal (indirect action).

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Iron-Reducing Bacterium - an overview | ScienceDirect Topics

Organisms capable of reducing iron were first cultured in 1987, and those capable of reducing other metals like manganese have only recently been isolated (Lovley, 1991). In culture, the type of carbon source influences the rate of iron reduction, with acetate oxidation yielding the highest rate, followed by glucose and benzoate oxidation .

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Microbiology Chapter 13 Flashcards | Quizlet

28) Bacteria that are capable of oxidizing both iron and sulfur usually have a strong preference for sulfur oxidation because it yields more energy. False 29) Beta-oxidation exclusively removes two carbons at a time to catabolize fatty acids regardless of the carbon chain length.

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(PDF) Thermophilic iron-oxidizing bacteria found in copper .

PDF | Rod-shaped bacteria capable of oxidizing ferrous iron at 55 degrees C were cultured from samples of a copper mine leach dump. Yeast extract or cysteine was required by these Thiobacillus .

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Bog iron - Wikipedia

Bog iron is a form of impure iron deposit that develops in bogs or swamps by the chemical or biochemical oxidation of iron carried in solution. In general, bog ores consist primarily of iron oxyhydroxides, commonly goethite (FeO(OH)).. Iron-bearing groundwater typically emerges as a spring.The iron is oxidized to ferric hydroxide upon encountering the oxidizing environment of the

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Biobeneficiation of Iron Ores - sapub

Utilization of aerobic and anaerobic microorganisms in iron ore beneficiation is discussed. Microorganisms such as Paenibacillus polymyxa, Bacillus subtilis, Saccharomyces cerevisiae (yeast) and Desulfovibrio desulfuricans (SRB) are capable of significantly altering the surface chemical behavior of iron ore minerals such as hematite, corundum, calcite, quartz and apatite.

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