Buscar
Mostrando ítems 1-10 de 11
Artículo
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; ...
Artículo
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, ...
Artículo
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 ...
Artículo
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 ...
Artículo
Valorisation of a flotation tailing by bioleaching and brine leaching, fostering environmental protection and sustainable development
(Elsevier, 2019-10)
Flotation tailing is a problematic mining waste, because contains sulphides that exposed to oxidising conditions generate acidic drainage and the subsequent metal mobilisation. In this study, a flotation tailing produced ...
Artículo
Oxygen solubility in copper bioleaching solutions
(Elsevier, 2017-01)
Oxygen is usually the limiting reagent in bio-leaching processes. For this reason, aeration is a key point to take into account when designing such processes, and the oxygen saturation concentration is an important variable ...
Artículo
Causes of inhibition of bioleaching by Cu are also thermodynamic
(Wiley-Blackwell, 2019-01)
BACKGROUND: Cu is an indispensable natural resource for society, as its use is widespread and essential for many technologies. Consequently, worldwide production is around 18×106 tn year−1, and close to 25% is produced by ...
Artículo
Ferric leaching of the sphalerite contained in a bulk concentrate: Kinetic study
(Elsevier, 2018-08)
A novel process for the integral treatment of polymetallic sulphide ores is proposed. The process consists of a global flotation, two stages of ferric leaching, the first stage dissolves the sphalerite and the rest of ...
Artículo
Operational pH in packed-bed reactors for ferrous ion bio-oxidation
(Elsevier, 2010-09)
The flooded packed-bed bioreactor plays a major role in the field of applications of ferrous ion bio-oxidation. The pH is an important variable in the control of this type of reactor, upon which the functionality of biofilm ...
Artículo
Influence of zinc on ferrous iron bio-oxidation: Biological or physical nature?
(Elsevier, 2010-07-15)
Ferrous iron bio-oxidation is negatively affected by the presence of heavy metals. Although the available information relates this phenomenon to purely biological aspects, it is contradictory with respect to tolerance ...