the bioleaching of sulphide minerals with
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the bioleaching of sulphide minerals with

The bioleaching of sulphide minerals with emphasis

Bioleaching tests indicated that the newly isolated L. ferriphilum CC can be a prospective strain for the bioleaching of sulfide minerals in pure culture or in association with other iron- and/or ...

Bioleaching of Sulphide Minerals with Sulfobacillus ...

Copper sulphide ore bioleaching processes are currently under full development in Chile and worldwide, for treatment of: secondary sulphide in heaps [1], low-grade ores in dumps, and concentrates in reactors at high temperatures [2]. Abundant knowledge is available in the literature and great experience has been gathered about the behavior of mesophilic microorganisms and their application in ...

The bioleaching of sulphide minerals with emphasis

The bioleaching of sulphide minerals with emphasis on copper sulphides — A review Author: H.R. Watling Journal: Hydrometallurgy Issue Date: 2006 Page: 81-108. Related;

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

Chapter 6 Bioleaching of Metals from Sulphidic Minerals 91 Environmental aspect of bioleaching process In addition to the commercial value of bacterial leaching, bacterial interaction with sulphide minerals is a significant factor in the formation of AMD or ARD. AMD is a major environmental problem.

The Mechanism and Kinetics of Bioleaching Sulphide

2010-11-28  Abstract. The measurement of oxygen and carbon dioxide consumption rates together with the measurement of redox potentials, has led to the further elucidation of the mechanism of bioleaching of sulphide minerals and enabled the kinetics of the sub-processes involved to be determined separately.

(PDF) Sulphide Mineral Leaching and Chemistry of

In the bioleaching of sulphide minerals with Thiobacillus ferrooxidans an important fraction of the total bacterial population remains attached to the solid substrate. The attached microorganisms ...

WO2001018262A2 - Bioleaching of sulphide minerals

A method of bioleaching a slurry containing sulphide minerals which includes the step of supplying a feed gas containing in excess of 21% oxygen by volume, to the slurry, increases the rate of oxygen transfer from the gas to the liquid phase. Combined with the use of high temperatures between 50 °C and 100 °C and thermophile microorganisms the rate of sulphide mineral leaching is greatly ...

Bioleaching technology in minerals processing

2007-4-20  Bioleaching technology in minerals processing John Neale Mintek, Biotechnology Division Private Bag X3015, Randburg, 2125, South Africa Bioleaching is a process that employs micro-organisms to dissolve (leach) sulphide minerals. It finds application in the extraction of metals from their ores. Although bioleaching was used unknowingly

Synthesis oxide pigments using leachate from the ...

2019-6-10  pigments using leachate from the bioleaching of a copper sulphide minerals flotation concentrate Carlos de Souza, Luis Sobral, Débora de Oliveira, Paula do Nascimento and Gabriel Peixoto Centre for Mineral Technology, Brazil ABSTRACT

Bioleaching of cobalt from low-grade sulphidic mining ...

2020-9-6  In addition, some nickel, zinc and copper were found, mainly as their own minerals. Thus, the objective was to conduct a total sulphide dissolution by bioleaching for liberating cobalt from pyrite, as well as other valuables from their minerals. The work started with a 9-month adaptation phase of used microorganisms to tolerate the studied ...

Bioleaching of different copper sulphide minerals and ...

2018-10-9  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> covellite> chalcopyrite.

Bioleaching, Viable Alternative For The Treatment Of

2018-8-1  Bioleaching, Viable Alternative For The Treatment Of Some Metallic Sulphides In Peru. *Corresponding Author: Vladimir Arias 42 Page in the range 1.5 to 4.0 pH, is widely distributed in deposits of altered minerals and drainages that are generated through them (Sand, W. et al 1992).

Microbes and mineral recovery: Bioleaching of copper,

2020-4-22  Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment. Bioleaching is the commercialization of the ability of certain bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals. The leaching of sulfide minerals distinguishes bioleaching from

Bioleaching technology in minerals processing

2007-4-20  Bioleaching technology in minerals processing John Neale Mintek, Biotechnology Division Private Bag X3015, Randburg, 2125, South Africa Bioleaching is a process that employs micro-organisms to dissolve (leach) sulphide minerals. It finds application in the extraction of metals from their ores. Although bioleaching was used unknowingly

Bioleaching - Murdoch University

2009-11-2  Bioleaching is a type of minerals processing that utilises microorganisms to ‘leach’ sulphide or ferrous minerals whereby valuable metals such as copper, uranium and zinc are released in solution (Neale 2006). It is essentially a biohydrometallurgical process which employs the catalytic capability of acidophilic micro-organisms to break ...

Studies on the bioleaching of refractory concentrates

2009-8-27  pyrite bioleaching the primary role of the bacteria is the oxidation of the ferrous-iron to the ferric form, thereby maintaining a high redox potential within the system and ensuring the continued leaching of the mineral. A multiple sub-process mechanism for the bioleaching of sulphide minerals suggests that the overall process can be

Recovery of precious metal from sulphide minerals by ...

2000-9-5  The invention further extends to a method of bioleaching an aqueous slurry containing precious metal bearing sulphide minerals which includes the steps of bioleaching the slurry at a temperature above 40° C. and maintaining the dissolved oxygen concentration in the slurry in the range of from 0.2×10 −3 kg/m 3 to 10×10 −3 kg/m 3.

Comparative study on the passivation layers of copper ...

2012-10-2  The bioleaching of copper sulphide minerals was investigated by using A. ferrooxidans ATF6. The result shows the preferential order of the minerals bioleaching as djurleite>bornite>pyritic chalcopyrite>covellite>porphyry chalcopyrite. The residues were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). It is indicated that jarosite may not be responsible for ...

(PDF) Bioleaching of six nickel sulphide ores with ...

In this study, the solu- A bioleaching study was conducted with six different nickel sul- tion pH had a significant impact on the extraction of both iron and phide ores from different geographical locations across Canada. magnesium; with all six ores, operating at pH 3 produced a statisti- The primary sulphide minerals were generally the same ...

Bioleaching of different copper sulphide minerals and ...

2018-10-9  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> covellite> chalcopyrite.

Bioleaching of cobalt from low-grade sulphidic mining ...

2020-9-6  In addition, some nickel, zinc and copper were found, mainly as their own minerals. Thus, the objective was to conduct a total sulphide dissolution by bioleaching for liberating cobalt from pyrite, as well as other valuables from their minerals. The work started with a 9-month adaptation phase of used microorganisms to tolerate the studied ...

Microbes and mineral recovery: Bioleaching of copper,

2020-4-22  Bioleaching is the extraction of a metal from sulfide ores or concentrates using materials found native to the environment. Bioleaching is the commercialization of the ability of certain bacteria and archaea, found in nature, to catalyze the oxidation of sulfide minerals. The leaching of sulfide minerals distinguishes bioleaching from

Bioleaching of complex polymetallic sulfide ores by

2014-7-11  Bioleaching energy dispersive X-ray analysis (EDX). may be utilized as an alternative process for the extraction of metals from complex ores/concentrates, 2 Materials and methods thus, the study and application of bioleaching of polymetallic sulphide ores are significantly important. 2.1 Single minerals and raw ores Various acidophilic, iron ...

Frontiers Bioleaching and Electrochemical Behavior

2021-5-10  Biooxidation of ferrous iron and sulphide at low temperatures: implications on acid mine drainage and bioleaching of sulphide minerals. Hydrometallurgy 104, 454–458. doi: 10.1016/j.hydromet.2010.03.027

Studies on the bioleaching of refractory concentrates

2009-8-27  pyrite bioleaching the primary role of the bacteria is the oxidation of the ferrous-iron to the ferric form, thereby maintaining a high redox potential within the system and ensuring the continued leaching of the mineral. A multiple sub-process mechanism for the bioleaching of sulphide minerals suggests that the overall process can be

Bioleaching - Murdoch University

2009-11-2  Bioleaching is a type of minerals processing that utilises microorganisms to ‘leach’ sulphide or ferrous minerals whereby valuable metals such as copper, uranium and zinc are released in solution (Neale 2006). It is essentially a biohydrometallurgical process which employs the catalytic capability of acidophilic micro-organisms to break ...

Recovery of nickel from nickel bearing sulphide

2002-7-19  The bioleaching of sulphide minerals at an elevated temperature results in a high rate of sulphide mineral oxidation, but is dependent on the supply of oxygen and carbon dioxide to maintain high rates of sulphide mineral oxidation and of microorganism growth at adequate rates. The absorption of oxygen and carbon dioxide in the bioleaching ...

Recovery of precious metal from sulphide minerals by ...

2000-9-5  The invention further extends to a method of bioleaching an aqueous slurry containing precious metal bearing sulphide minerals which includes the steps of bioleaching the slurry at a temperature above 40° C. and maintaining the dissolved oxygen concentration in the slurry in the range of from 0.2×10 −3 kg/m 3 to 10×10 −3 kg/m 3.

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