Please use this identifier to cite or link to this item: http://dspace.utpl.edu.ec/handle/123456789/19302
Title: Mineralogical characterization of a polymetallic concentrate Portovelo mining district. Bioleaching by a native bacterial consortium
Authors: Gentina, J.
Aguirre Chamba, P.
Gordillo, F.
Donati, E.
Sanmartin Gutierrez, V.
Suarez Chacon, J.
Keywords: 16s rrna
a
ferrooxidans
biooxidation
mineralogy
polymetallic tails
metadata.dc.date.available: 2009-05-19
2017-06-16T22:03:19Z
Publisher: Advanced Materials Research
Abstract: The mining district of Zaruma-Portovelo of southern Ecuador is a deposit of polymetallic sulfides worked since 1908. Currently the small traditional mining operation processes 1800 tons of ore a day, generating environmental waste that is accumulated and systematically discharged into the Calera and Amarillo Rivers. In this watershed area of Puyango-Tumbes, where samples were taken and subjected to gravimetric concentration, a mineralogical analysis of the concentrate was made. Samples of sediments taken from areas of weathered mining shafts were used to isolate native microorganisms for subsequent molecular and physiological characterization. The mineral concentrate contains 66.63 % of pyrite, 175 ppm Ag and 6.9 ppm Au (with 80 % of refractory gold). This mineral was subjected to biooxidation by the isolated native organisms. In experiments with pulp density of 10%, the solubility of the sulfides was very significant, reaching concentrations of Fe3 + 30 g/L and sulfate 60 g/L. © (2009) Trans Tech Publications.
metadata.dc.identifier.other: http://dx.doi.org/10.4028/www.scientific.net/AMR.71-73.481
URI: http://dspace.utpl.edu.ec/handle/123456789/19302
ISBN: 10226680
ISSN: 0878493220; 9780878493227
Other Identifiers: http://dx.doi.org/10.4028/www.scientific.net/AMR.71-73.481
Other Identifiers: http://dx.doi.org/10.4028/www.scientific.net/AMR.71-73.481
metadata.dc.language: Inglés
metadata.dc.type: Article
Appears in Collections:Artículos de revistas Científicas

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