biobeneficiation of mineral sulphide

biobeneficiation of mineral sulphide

(PDF) Revisiting Sulphide Mineral (Bio) Processing: A

Biobeneficiation of metal sulfidesThe biobeneficiation includes the processes of bio-flotation and bio-flocculation where selective removal of undesirable mineral constituents from an ore is accomplished.

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REVISITING SULPHIDE MINERAL (BIO) PROCESSING: A

2016-10-3  sulphide gangue, grinding in steel mills, and oxidation of sulphides. Iron oxide/sulphide fines are the primary component of acid mine drainage that control scavenging of toxic cations. Such fine particles are produced during grinding of iron ores pose a serious problem for flotation and degrade the quality of the concentrate. Generally,

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Biobenefication of Oxide Minerals from Bacillus

Biobeneficiation processes involving the separation of valuable minerals from ores and materials using conventional flotation and flocculation methods have been shown to be promising in recent years. There is an enormous potential to utilize microorganisms as

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(PDF) Minerals bioprocessing: R D needs in mineral ...

The biomodification of the mineral surface changes its properties in such a manner that the mineral can be used in selective flotation and flocculation [9]. ... Bioreduction in the development of ...

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Some recent advances in the bioprocessing of bauxite ...

2001-5-1  Biobeneficiation mechanismsThe mechanism of biobeneficiation is hitherto not well understood, and is generally thought to occur by a combination of direct attack and indirect mechanisms (Ehrlich, 1992). The indirect mechanism is often based on the acidolysis and complexation mechanisms of leaching of sulphidic minerals.

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Exploitation of Bacterial Activities in Mineral Industry ...

Biobeneficiation refers to removal of undesirable mineral components from an ore through interactions with microorganisms which bring about their selective removal by a bioleaching process. Compared to bioleaching of sulfide minerals by Thiobacilli, bioleaching of nonsulfide minerals has received little attention in the past.

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Surface modification studies on sulphide minerals

2003-9-29  It is well known that sulphide minerals get hydroxylated as a function of pH. In this context, it is pertinent to recall that the solubility product of lead hydroxide is over three orders of magnitude less than that of zinc hydroxide (Lide, 1999) .

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Leptosririllum ferrooxidans-sulfide mineral

2008-12-1  The biomodification of mineral surfaces involves the complex action of microorganisms on the mineral surface. There are three different mechanisms by means of which the bio-modification can occur: 1) attachment of microbial cells to the solid substrate[1-3], 2) oxidation reactions[4] and 3) adsorption and/or chemical reaction with the metabolite products [5].

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Minerals bioprocessing: R D needs in mineral ...

2010-10-1  The biomodification of mineral surfaces involves the complex action of microorganism on the mineral surface. There are three different mechanisms by means of which the biomodification can occur: i) attachment of microbial cells to the solid substrate, ii) oxidation reactions and iii) adsorption and/or chemical reaction with the metabolite products (EPS).

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Recent advances in microbial mining SpringerLink

1996-9-1  Microbial mining of copper sulphide ores, has been practiced on an industrial scale since the late 1950s. Since then, advances in microbial mining and the role of microorganisms involved in solubilization of metals have assumed commerical importance. The fact that bioleaching processes save energy, have a minimum pollution potential and are able to ...

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(PDF) Bioleaching of Metals from Sulphidic Minerals ...

Mineralogical factors Mineral substrate The mineralogical composition of the leaching substrate is of primary importance. Various toxic substances, often inherently present in sulphide mineral, are leached out during biooxidation of minerals and they have been

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Biobenefication of Oxide Minerals from Bacillus

Biobeneficiation processes involving the separation of valuable minerals from ores and materials using conventional flotation and flocculation methods have been shown to be promising in recent years. There is an enormous potential to utilize microorganisms as flocculating agents, flotation collectors and/or depressants. The study involves Biobeneficiation of oxide minerals using Bacillus subtilis.

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An Integrated Biotechnological Approach to Gold

2018-6-7  Mineral Processing and Extractive Metallurgy Review ... ferrooxidans in the flotation beneficiation of gold-bearing sulphides and in enhancing gold recovery from refractory sulphide ores and concentrates has been demonstrated. ... Biogenesis, gold bioprocessing, Thiobacillus ferrooxidans, integrated biotechnological circuit, biobeneficiation, ...

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Minerals Free Full-Text Selective Attachment of ...

The replacement of depressants used in sulfide mineral beneficiation, with bacteria and their metabolites, promises to reduce the environmental impact left by the mining industry. In this study, the attachment of Leptospirillum ferrooxidans, L.f, to chalcopyrite and pyrite was investigated through Scanning Electron Microscopy (SEM). The impact of selective attachment, bacterial growth ...

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Biomineralization of metal-containing ores and ...

Biomining is the use of microorganisms to extract metals from sulfide and/or iron-containing ores and mineral concentrates. The iron and sulfide is microbially oxidized to produce ferric iron and sulfuric acid, and these chemicals convert the insoluble sulfides of metals such as copper, nickel and zinc to soluble metal sulfates that can be readily recovered from solution.

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Surface thermodynamics and extended DLVO theory

Adsorption tests were carried out at physiologic conditions to estimate the amount of cells adsorbed onto a mineral surface and the extent of alteration of that mineral surface in biobeneficiation. The free energy of adhesion was found to be negative for both minerals, indicating that the adhesion is energetically favored and preferred.

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Biooxidation - BioMineWiki

2009-5-25  Applications . It can be used as a pretreatment process to degrade mineral sulfides such as pyrite or arsenopyrite. The most common commercial example is pre-treatment of arsenopyrite refractory gold concentrates. The sulphide matrix (arsenopyrite), hosting inclusions of elemental gold particles, is biooxidated.The matrix surrounding the elemental gold will hence loosen up and partly ...

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Physicochemical Problems of Mineral Processing

Biosurfactants produced by Bacillus circulans and Streptomyces sp. were used for biomodification of both serpentinite and quartz surfaces. The biosurfactants produced by bacteria possess the ability to decrease the surface tension of water from 72 to 28.6 mNm-1 (Bacillus circulans) and to 29.3 mNm-1 (Streptomyces sp.).

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Physicochemical Problems of Mineral Processing

The mass of concentrate was then 34.5% of the ore feed. The recoveries of copper and zinc were 91%, of cobalt 89% and of manganese 53%. The content of carbon in the concentrate was 11.3% as graphite represents a naturally floating harmful mineral in the ore.

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Hanumantha Rao Kota - NTNU

RESEARCH PROFILE. My major research activity is in the area of Applied Surface Science relevent to Mineral Processing Technology. My research work includes i) physico-chemical processing and recovering of valuable minerals from ores, lean ores and waste materials, ii) theoretical thermodynamic equilibrium calculation of chemical species involving solid, liquid and gaseous phases, iii) mineral ...

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Biobenefication of Oxide Minerals from Bacillus

Biobeneficiation processes involving the separation of valuable minerals from ores and materials using conventional flotation and flocculation methods have been shown to be promising in recent years. There is an enormous potential to utilize microorganisms as flocculating agents, flotation collectors and/or depressants. The study involves Biobeneficiation of oxide minerals using Bacillus subtilis.

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Bacteria-Sulfide Mineral Interactions with reference to ...

2016-9-30  For mineral processing processes using bacterial cells, species with mineral habitat were chosen, namely for sulphide minerals, species of genus Thiobacillus and Leptospirillum are typical. 1.1.1 Genus Thiobacillus (Beijerinck 1904) The genus Thiobacillus cells according to Bergey’s manual of systematic bacteriology

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An Integrated Biotechnological Approach to Gold

2018-6-7  Mineral Processing and Extractive Metallurgy Review ... ferrooxidans in the flotation beneficiation of gold-bearing sulphides and in enhancing gold recovery from refractory sulphide ores and concentrates has been demonstrated. ... Biogenesis, gold bioprocessing, Thiobacillus ferrooxidans, integrated biotechnological circuit, biobeneficiation, ...

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Minerals Free Full-Text Selective Attachment of ...

The replacement of depressants used in sulfide mineral beneficiation, with bacteria and their metabolites, promises to reduce the environmental impact left by the mining industry. In this study, the attachment of Leptospirillum ferrooxidans, L.f, to chalcopyrite and pyrite was investigated through Scanning Electron Microscopy (SEM). The impact of selective attachment, bacterial growth ...

More

Microbiology for Minerals, Metals, Materials and ...

Biomineralisation and Microbially Induced Beneficiation; K.A. Natarajan Biomining of Base Metals from Sulphide Minerals; Bhargav C. Patel, Devayani R. Tipre and Shailesh R. Dave Microbial Extraction of Uranium from Ores; Abhilash and B.D. Pandey Biohydrometallurgy: From the Zijinshan Experience to Future Prospects; Liu Xingyu, Ruan Renman, Wen Jiankang and Wang Dianzuo Spectroscopic Study

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Bioleaching: metal solubilization by microorganisms

7.2.1 Biobeneficiation. Beside the recovery of valuable metals from non-sulfide minerals, heterotrophic microorganisms can also be used for upgrading mineral raw materials by removal of impurities. Quartz sands, kaolins and clays often contain iron oxides which lower the quality of these mineral raw materials.

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Microbiology for Minerals, Metals, Materials and the ...

2018-11-8  Microbiology for Minerals, Metals, Materials and the Environment links chemical, metallurgical, and other metal inherent systems with microbes, and analyzes the interdependence between them. Specifically intended to underscore the importance of microbes in environmental remediation in the mining industries, this text offers a basic and conceptual understanding of the role

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Minerals Free Full-Text Surface Chemical ...

A. ferrooxidans and their metabolic products have previously been explored as a viable alternative depressant of pyrite for froth flotation; however, the mechanism by which separation is achieved is not completely understood. Scanning electron microscopy (SEM), photoemission electron microscopy (PEEM), time-of-flight secondary ion mass spectrometry (ToF-SIMS) and captive bubble contact angle ...

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Minerals Engineering International Online - Froth ...

2021-3-30  Y. Peng, S. Grano, Effect of iron contamination from grinding media on the flotation of sulphide minerals of different particle size, International Journal of Mineral Processing, Vol. 97, No. 1

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mineral extraction companies in finland 」

mineral extraction companies in finland_MiningWikipediaMining is the extraction of valuable minerals or other geological materials from the Earth, usually from an ore body, lode, vein, seam, reef or placer deposit.These deposits form

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