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Article
Monitoring polythionate bio-oxidation by conductivity measurement
(Elsevier, 2016)
Polythionates are formed by the incomplete oxidation of sulphide minerals in the grinding and flotation circuits, and particularly of those containing pyrite. Polythionate levels in the recycling water must be adjusted; ...
Article
Treatment of secondary copper sulphides (chalcocite and covellite) by the BRISA process
(Elsevier, 2002-10)
The technical viability of the BRISA process (Biolixiviación Rápida Indirecta con Separación de Acciones: Fast Indirect Bioleaching with Actions Separation) for secondary copper sulphides has been proved. One concentrate ...
Article
An alternative approach to recover lead, silver and gold from black gossan (polymetallic ore). Study of biological oxidation and lead recovery stages
(Elsevier, 2019-01)
A novel procedure to recover lead, silver and gold from polymetallic sulphide ores, cleaner than the traditional hydrometallurgical route (hot brine leaching), is proposed. This process consists of a biooxidation stage, ...
Article
Ferric iron production in packed bed bioreactors: Influence of pH, temperature, particle size, bacterial support material and type of air distributor
(Elsevier, 2001-05)
The biooxidatíon of ferrous iron in solution has industrial applications in the regeneration of ferric iron as a leachíng agent for non-ferrous metallic sulphides and in the treatment of acid mine drainage. The aim of this ...
Article
Ferrous iron biooxidation in a flooded packed-bed bioreactor at extreme conditions of iron concentration and acidity
(Elsevier, 2023-12)
The utility of ferrous iron biooxidation is to regenerate Fe(III) at required rates and conditions in specific hydrometallurgical contexts, such as metal extraction from ores/concentrates and mining and electronic waste. ...
Article
Biotic factor does not limit operational pH in packed-bed bioreactor for ferrous iron biooxidation
(Oxford University Press, 2012-12-01)
Ferrous ion biooxidation is a process with many promising industrial applications: mainly regeneration of ferric ion as an oxidizing reagent in bioleaching processes and depuration of acid mine drainage. The flooded packedbed ...
Article
Microbial Populations in Ferrous Iron Oxidation Bioreactors
(Universidad Pablo de Olavide de Sevilla, 2016)
Motivación: ferrous iron oxidation can take place in partly controlled biological reactors inoculated with mixed cultures of acidophilic microorganisms. In these bioreactors, liquor pH can affect ...
Article
Recovery of Zn from acid mine water and electric arc furnace dust in an integrated process
(Elsevier, 2016-01-01)
In this paper, the purification of acid mine water and the treatment of electric arc furnace dust (EAFD) are integrated into one process with the aim of recovering the Zn content of both effluent and waste. Zinc recovery ...
Article
Adaptation of an iron oxidising culture to extremely high Fe concentration by a programmed fed-batch bioreactor
(Elsevier, 2024-01)
Ferric iron plays a key role as a leaching agent. In ferric leaching, the generated ferrous iron can be biologically regenerated by biooxidation. In commercial applications, microbial growth usually limits operational ...
Article
Copper recovery from chalcopyrite concentrates by the BRISA process
(Elsevier, 2003-07)
The technical viability of the BRISA process (Biolixiviación Rápida Indirecta con Separación de Acciones: Fast Indirect Bioleaching with Actions Separation) for the copper recovery from chalcopyrite concentrates has been ...