Listar Artículos (Ingeniería Química) por autor "Mazuelos Rojas, Alfonso"
Mostrando ítems 1-20 de 27
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A High Productivity Bioprocess for Obtaining Metallic Copper from Printed Circuit Boards (PCBs)
Iglesias González, María Nieves; Dorado, Antonio D.; Ramírez del Amo, Pablo; Mazuelos Rojas, Alfonso (Elsevier, 2024)PCBs constitute a residue rich in metals, among which copper stands out due to its majority content, much higher than that ...
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A new thiosalt depuration bioprocess for water- recycling in metallic sulphide mineral processing
Mazuelos Rojas, Alfonso; Iglesias González, María Nieves; Montes Rosúa, Cristina; Lorenzo Tallafigo, Juan; Romero Aleta, Rafael; Carranza Mora, Francisco (Elsevier, 2019-11)Economic and environmental imperatives force the metallic sulphide processing industry to re-use liquors that normally ...
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A novel hydrometallurgical treatment for the recovery of copper, zinc, lead and silver from bulk concentrates
Lorenzo Tallafigo, Juan; Romero Aleta, Rafael; Iglesias González, María Nieves; Mazuelos Rojas, Alfonso; Romero Aleta, Rafael; Carranza Mora, Francisco (Elsevier, 2021-03)Nowadays sulphide ores exploitation is undergoing some troubles, which are hindering the treatment through traditional ...
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Adaptation of an iron oxidising culture to extremely high Fe concentration by a programmed fed-batch bioreactor
Perdigones, Blanca; Ramírez del Amo, Pablo; Mazuelos Rojas, Alfonso (Elsevier, 2024-01)Ferric iron plays a key role as a leaching agent. In ferric leaching, the generated ferrous iron can be biologically ...
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An alternative approach to recover lead, silver and gold from black gossan (polymetallic ore). Study of biological oxidation and lead recovery stages
Lorenzo Tallafigo, Juan; Iglesias González, María Nieves; Mazuelos Rojas, Alfonso; Romero Aleta, Rafael; Carranza Mora, Francisco (Elsevier, 2019-01)A novel procedure to recover lead, silver and gold from polymetallic sulphide ores, cleaner than the traditional ...
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Biorecovery of copper from converter slags: Slags characterization and exploratory ferric leaching tests
Carranza Mora, Francisco; Mazuelos Rojas, Alfonso; Iglesias González, María Nieves; Romero Aleta, Rafael; Forcat, O. (HYDRD, 2009-06)This paper studies the ferric sulphate leaching of converter slag (9% Cu) in order to recover Cu through a process in which ...
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Biotic factor does not limit operational pH in packed-bed bioreactor for ferrous iron biooxidation
Mazuelos Rojas, Alfonso; Moreno, José María; Carranza Mora, Francisco; Palomino, Carmen; Torres Rueda, Antonio Ildefonso; Villalobo Polo, Eduardo (Oxford University Press, 2012-12-01)Ferrous ion biooxidation is a process with many promising industrial applications: mainly regeneration of ferric ion as ...
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Causes of inhibition of bioleaching by Cu are also thermodynamic
Mazuelos Rojas, Alfonso; García Tinajero, Carlos J.; Romero Aleta, Rafael; Iglesias González, María Nieves; Carranza Mora, Francisco (Wiley-Blackwell, 2019-01)BACKGROUND: Cu is an indispensable natural resource for society, as its use is widespread and essential for many technologies. ...
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Copper recovery from chalcopyrite concentrates by the BRISA process
Romero Aleta, Rafael; Mazuelos Rojas, Alfonso; Palencia, I.; Carranza Mora, Francisco (Elsevier, 2003-07)The technical viability of the BRISA process (Biolixiviación Rápida Indirecta con Separación de Acciones: Fast Indirect ...
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Copper recovery from unground printed circuit board by biogenic ferric at high solid/liquid ratio
Iglesias González, María Nieves; Ramírez del Amo, Pablo; Lorenzo Tallafigo, Juan; Romero García, Aurora; Mazuelos Rojas, Alfonso; Romero Aleta, Rafael; Carranza Mora, Francisco (Elsevier, 2022)In this work, the recovery of Cu from large waste printed circuit board (PCB) pieces by biogenic ferric sulphate at high ...
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Ferric iron production in packed bed bioreactors: Influence of pH, temperature, particle size, bacterial support material and type of air distributor
Mazuelos Rojas, Alfonso; Palencia, I.; Romero Aleta, Rafael; Rodriguez, G.; Carranza Mora, Francisco (Elsevier, 2001-05)The biooxidatíon of ferrous iron in solution has industrial applications in the regeneration of ferric iron as a leachíng ...
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Ferric leaching of the sphalerite contained in a bulk concentrate: Kinetic study
Lorenzo Tallafigo, Juan; Iglesias González, María Nieves; Romero Aleta, Rafael; Mazuelos Rojas, Alfonso; Carranza Mora, Francisco (Elsevier, 2018-08)A novel process for the integral treatment of polymetallic sulphide ores is proposed. The process consists of a global ...
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Ferrous iron biooxidation in a flooded packed-bed bioreactor at extreme conditions of iron concentration and acidity
Mazuelos Rojas, Alfonso; Moreno-Pérez, Martín; Perdigones, Blanca; Ramírez del Amo, Pablo; Iglesias González, María Nieves (Elsevier, 2023-12)The utility of ferrous iron biooxidation is to regenerate Fe(III) at required rates and conditions in specific hydrometallurgical ...
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Influence of zinc on ferrous iron bio-oxidation: Biological or physical nature?
Mazuelos Rojas, Alfonso; Iglesias González, María Nieves; Romero Aleta, Rafael; Mejías, Miguel Ángel; Carranza Mora, Francisco (Elsevier, 2010-07-15)Ferrous iron bio-oxidation is negatively affected by the presence of heavy metals. Although the available information ...
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Inhibition of bioleaching processes by organics from solvent extraction
Mazuelos Rojas, Alfonso; Iglesias González, María Nieves; Carranza Mora, Francisco (Elsevier, 1999-12)The influence of the presence of an organic phase composed of 15% LIX 64 as extractant and kerosene as solvent on ferrous ...
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Microbial Populations in Ferrous Iron Oxidation Bioreactors
Villalobo Polo, Eduardo; Mazuelos Rojas, Alfonso (Universidad Pablo de Olavide de Sevilla, 2016)Motivación: ferrous iron oxidation can take place in partly controlled biological reactors inoculated with ...
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Monitoring polythionate bio-oxidation by conductivity measurement
Montes Rosua, Cristina; Iglesias González, María Nieves; Romero Aleta, Rafael; Mazuelos Rojas, Alfonso; Carranza Mora, Francisco (Elsevier, 2016)Polythionates are formed by the incomplete oxidation of sulphide minerals in the grinding and flotation circuits, and ...
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Operational pH in packed-bed reactors for ferrous ion bio-oxidation
Mazuelos Rojas, Alfonso; Carranza Mora, Francisco; Romero Aleta, Rafael; Iglesias González, María Nieves; Villalobo Polo, Eduardo (Elsevier, 2010-09)The flooded packed-bed bioreactor plays a major role in the field of applications of ferrous ion bio-oxidation. The pH ...
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Oxygen solubility in copper bioleaching solutions
Mazuelos Rojas, Alfonso; García Tinajero, Carlos Jesús; Romero Aleta, Rafael; Iglesias González, María Nieves; Carranza Mora, Francisco (Elsevier, 2017-01)Oxygen is usually the limiting reagent in bio-leaching processes. For this reason, aeration is a key point to take into ...
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Oxygen transfer in ferric iron biological production in a packed-bed reactor
Mazuelos Rojas, Alfonso; Romero Aleta, Rafael; Palencia, I.; Carranza Mora, Francisco; Borjas, F. J. (Elsevier, 2002-07)In this paper, oxygen transfer in the ferrous iron biooxidation process in a packed-bed reactor is studied. The reactor ...