Bioleaching of minerals — a valid alternative for developing countries

Acevedo, Fernando; Gentina, Juan Carlos; Bustos, Sergio

doi:10.1016/0168-1656(93)90141-9

Cited by 27 publications

(13 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…An acid solution is applied on top of heaps via drip irrigation or via sprinkling and is repeated as many times as necessary to obtain the desired copper extraction and concentration. It is important to build a homogeneous heap with high void fraction in order to facilitate the percolation of the leaching solution and the upcoming gas flow injected at the bottom to provide the necessary oxygen and carbon dioxide [15][16][17]. The pregnant liquor then enters the recuperation section, consisting of a solvent extraction (SX) unit that purifies and concentrates the liquid in copper and copper recovery via electrowinning (EW).…”

Section: Bioleaching Processmentioning

confidence: 99%

Copper Bioleaching in Chile

Gentina

Acevedo

2016

Minerals

Self Cite

View full text Add to dashboard Cite

Chile has a great tradition of producing and exporting copper. Over the last several decades, it has become the first producer on an international level. Its copper reserves are also the most important on the planet. However, after years of mineral exploitation, the ease of extracting copper oxides and ore copper content has diminished. To keep the production level high, the introduction of new technologies has become necessary. One that has been successful is bioleaching. Chile had the first commercial operation in the world exclusively via bioleaching copper sulfides. Nowadays, all bioleaching operations run in the country contribute to an estimated 10% of total copper production. This article presents antecedents that have contributed to the development of copper bioleaching in Chile.

show abstract

Section: Bioleaching Processmentioning

confidence: 99%

Copper Bioleaching in Chile

Gentina

Acevedo

2016

Minerals

Self Cite

View full text Add to dashboard Cite

show abstract

“…(Colmer and Hinkle, 1947;Temple and Colmer, 1950). En adelante, y debido al gran interés económico y a la relevancia en diversas áreas de la actividad humana, muchas investigaciones han sido enfocadas sobre el papel que tienen los microorganismos en la oxidación y lixiviación de sulfuros (Vanselow, 1976;Bruynesteyn, 1989;Rossi, 1990;Acevedo and Gentina, 1993;Tuovinen, 1993-1994;McIntosh et al 1997;Brierley, 2001, Rawlings, 2002;Rohwerder et al 2003;Olson et al 2003;Da Silva, 2004;Francisco, 2006;Ehrlich and Newman, 2009).…”

Section: Introductionunclassified

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

et al. 2011

View full text Add to dashboard Cite

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)

show abstract

“…The processing plant can be built in the immediate vicinity of the ore deposit, saving transport costs. The procedures are not complicated and are easy to control, extensive technical knowledge is not required [36].…”

Section: Bio-metallurgy: a Way For Futurementioning

confidence: 99%

Considerations about recovery of critical metals using bio-metallurgy

Gherghe

2017

E3S Web Conf.

View full text Add to dashboard Cite

Abstract. The increased requirement of critical metals due to green technologies needs, together with the geopolitical environment to ensure these metals, has entailed decisive measures to avoid current supply insecurities in each country. These metals are essential to the products and services made and used daily, and contribute to sustaining and growing the economy. Thus, sustainable approaches from technological, environmental, economic and social point of view are needed to recover these metals from different resources. By using resources more efficiently, innovating in the concept of circular economy, it can be assure re-using, re-manufacturing or recycling of valuable materials. In this paper are presented some considerations related to using the waste dumps as potential resources to obtain critical metals by biometallurgical processes.

show abstract

Bioleaching of minerals — a valid alternative for developing countries

Cited by 27 publications

References 6 publications

Copper Bioleaching in Chile

Copper Bioleaching in Chile

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

Considerations about recovery of critical metals using bio-metallurgy

Contact Info

Product

Resources

About