Role and contribution of pure and mixed cultures of mesophiles in bioleaching of a pyritic chalcopyrite concentrate

Akçıl, Ata; Çiftçi, Hasan; Deveci, Hacı

doi:10.1016/j.mineng.2006.10.016

Cited by 108 publications

(53 citation statements)

References 33 publications

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“…Various studies have shown that a mixed culture containing the iron and sulphur oxidizing bacteria is more effective than pure culture. 23,[63][64][65] Iron and sulfur-oxidizing cultures are important for efficient degradation of chalcopyrite, probably due to demands for ferric iron as an oxidizing agent; and for the removal of elemental sulfur that could be formed on the mineral surface 64 (Table 2). …”

Section: Application Of Acidithiobacillus Ferrooxidans In Bioleachingmentioning

confidence: 99%

The Catalytic Role of Acidithiobacillus ferrooxidans for Metals Extraction from Mining - Metallurgical Resource

Maluckov

2017

BIJ

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Section: Application Of Acidithiobacillus Ferrooxidans In Bioleachingmentioning

confidence: 99%

The Catalytic Role of Acidithiobacillus ferrooxidans for Metals Extraction from Mining - Metallurgical Resource

Maluckov

2017

BIJ

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“…De este modo, en las últimas décadas los procesos biotecnológicos en minería son comercialmente viables para la extracción de metales base y preciosos, tratamiento de drenajes ácidos o biorremediación, remoción de metales pesados presentes en áreas mineras, suelos y sedimentos contaminados o residuos industriales como cenizas de incineración (Bosecker, 2001), en la degradación de cianuro (Akcil et al 2007), adecuación de concentrados para separación por flotación (Patra y Natarajan, 2003) y biodesulfurización de carbones (Eligwe, 1988;Rossi, 1990).…”

Section: Introductionunclassified

Aplicaciones biotecnológicas en minería aurífera: Estado del arte sobre la oxidación bacteriana de arsenopirita (FeAsS)

et al. 2011

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ResumenEn el mundo, grandes cantidades de sulfuros provenientes de la explotación minera con características refractarias y/o con iones, en su estructura cristalina, nocivos al medio ambiente y a la salud humana, han sido acumulados en el tiempo. Dichos sulfuros presentan contenidos de oro relevantes en la mayoría de los casos, el tratamiento de estos materiales no es factible por métodos convencionales, lo cual incrementa el costo de la recuperación de los valores metálicos presentes. Es así como, en las últimas décadas, la bio-hidrometalurgia, se ha convertido en una tecnología comercialmente viable para la extracción de metales preciosos. Además, es bien conocida por su utilización en la bio-remediación de drenajes ácidos, remoción de metales pesados presentes en áreas mineras, suelos y sedimentos contaminados, residuos industriales como cenizas de incineración; degradación de cianuro, adecuación de concentrados para separación por flotación espumante, biodesulfurización de carbones, entre otras. En este trabajo se presenta el principio fundamental de la oxidación bacteriana de la arsenopirita, así como un esbozo acerca de los mecanismos y diferentes susceptibilidades que muestra frente a la oxidación biológica.Palabras clave: Biominería, biooxidación, biolixiviación, arsénico, Acidithiobacillus ferrooxidans. AbstractThroughout the world, great quantities of sulfides from mining practices have accumulated over time.These have refractory characteristics y/or ions, in their crystalline structure, which are harmful to the environment y to human health. Said sulfides present relevant gold contents in most instances; treatment of these materials is not feasible through conventional methods, increasing the cost of recovery of the metallic values present. This is how in recent decades bio-hydrometallurgy has become a commercially viable technology for the extraction of precious metals. Additionally, it is well known for its use in the bio-remediation of acid drainage, removal of heavy metals present in mining areas, contaminated soils y sediments, industrial residues like incineration ash; cyanide degradation, adaptation of concentrates for foam separation, coal biodesulfurization, among others. This work presents the fundamental principle of bacterial oxidation of arsenopyrite, as well as an outline about the Aplicaciones biotecnológicas en minería aurífera: Estado del arte sobre la oxidación bacteriana de arsenopirita (FeAsS)

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“…Metal sulfides are dissolved by the oxidizing action of iron(III), which is continually regenerated by the cells. Iron(III) production by bacterial action can also be employed in bioremediation processes [3][4].…”

Section: Introductionmentioning

confidence: 99%

Ferrous Iron Oxidation by Immobilized on Refractory Clay Tiles

Donati¹

2008

TOBIOTJ

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Refractory clay tiles are composed of kaolin, which is the commercial name of clay, and this consists mainly of kaolinite mineral. Two such tiles and caowool packed in glass columns were used for the immobilization of Acidithiobacillus ferrooxidans cells in a ferrous iron medium, which was percolated through the supports. Colonization was carried out by several media replacements with no further inoculation until maximum ferric iron productivity was reached. One of the tiles was discarded due to the high iron precipitation during bacterial growth. The columns with the other supports were used for ferrous iron oxidation in batch and continuous flow modes of operation and these appeared to be promising supports for A. ferrooxidans. A ferrous iron oxidation rate of 14.5 mmol.l -1 .h -1 was reached in one of the columns in the continuous culture. After being used for several cultures, pieces of tiles with immobilized cells were stored at 4 ºC. Samples at different times were incubated in ferrous medium and these showed high cell activity even after 6 months.

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Role and contribution of pure and mixed cultures of mesophiles in bioleaching of a pyritic chalcopyrite concentrate

Cited by 108 publications

References 33 publications

The Catalytic Role of Acidithiobacillus ferrooxidans for Metals Extraction from Mining - Metallurgical Resource

The Catalytic Role of Acidithiobacillus ferrooxidans for Metals Extraction from Mining - Metallurgical Resource

Aplicaciones biotecnológicas en minería aurífera: Estado del arte sobre la oxidación bacteriana de arsenopirita (FeAsS)

Ferrous Iron Oxidation by Immobilized on Refractory Clay Tiles

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