Mineralogía del proceso de lixiviación de oro en minerales refractarios con soluciones Mineralogia dos processos de oxidacao sobre pressao e bacteriana do. La Lixiviación Bacteriana puede ser definida como un proceso natural de disolución que resulta de la acción de un grupo de bacterias. LIXIVIACIÓN BACTERIANA ALUMNA: Rodríguez Narváez Marycielo Kriss PROFESORA: Montoya Cantoral Elisa CARRERA:Operaciones.

Author: Mazulkree Malagal
Country: Georgia
Language: English (Spanish)
Genre: Business
Published (Last): 27 April 2009
Pages: 118
PDF File Size: 2.42 Mb
ePub File Size: 2.98 Mb
ISBN: 483-1-27091-728-3
Downloads: 97120
Price: Free* [*Free Regsitration Required]
Uploader: Tulkree

Bioleaching of minerals-a valide alternative for developing countries.

Metalurgistas e Ingenieros de Procesamiento de Minerales

Alterations in surfaces y textures of minerals during the bacterial leaching of a complex sulfide ore. Solid-phase alteration y iron transformation in column bioleaching of a complex sulfide ore. Environmental Geochemistry of sulfide oxidation. ACS Symposium Series American Chemical Society, Washington. Role y contribution of pure y mixed cultures of mesophiles in bioleaching of a pyritic chalcopyrite concentrate. Microbial leaching in environmental clean-up.

Metal extraction liixiviacion bacterial oxidation.

Present y future commercial applications of biohydrometallurgy. Biooxidation-heap concept for pretreatment of refractory gold ore. The surface composition of arsenopyrite exposed to oxidizing environments. Biodesulfurization of two Colombian coals with native microorganisms. Solid-phase products of bacterial oxidation of arsenopyrite. Characterization of lixivlacion oxidizing Thiobacillus. Tolerance to arsenite, arsenate, ferrous y ferriciron.

Arsenopyrite oxidation — A review.

Acta 72, ; — Characterization of a natural y an electro-oxidised arsenopyrite: Kinetics y mechanism of the bacterial y ferric sulphate oxidation of galena. Recent advances in refractory gold processing. Chromosomally encoded arsenical resistance of the moderately thermophilic acidophile Acidithiobacillus caldus. Characteristics of attachment y growth of Thiobacillus caldus on sulphide minerals: A orl look at microbial leaching patterns on sulfide minerals.


Oxidation of arsenopyrite FeAsS in acid part I: Stoichiometry y reaction scheme. Evolution of the bacteria population during the batch bioleaching of a cobaltiferous pyrite in a suspended-solids bubble colum y comparison with a mechanically agitated reactor. Universidade Estadual do Sao Paulo. Comparative economics of bacterial oxidation y roasting as a pre-treatment step for gold recovery from na auriferous pyrite concentrate.

Mineralogical y textural characterization of lime roasted pyrite y arsenopyrite for gold leaching. Toxicity of arsenic during high temperature bioleaching of gold-bearing arsenical pyrite.

Adhesion to metal sulfide surfaces by cells of Acidithiobacillus ferrooxidans, Acidithiobacillus thiooxidans y Leptospirillum ferrooxidans. Importance of microbial ecology in the development of new mineral technologies. Biological pre-oxidation to enhance gold y silver recovery from refractory pyritic ores y concentrates.

Pyrite oxidation y reduction: Molecular orbital theory considerations. Geochimica et Cosmochimica Acta. Brasilia, ; p. The chemistry of gold extraction. Ellis Horwood Limited, England. Acta 65, b p. Bacteria y the breakdown of sulfide minerals. Microbial Mineral Recovery, Ehrlich, H. McGraw Hill, New York, ; p. ATP requeriments for growth y maintenance of iron-oxidizing bacteria. Pristine y reacted surfaces of pyrrhotite y arsenopyrite as studied by X-ray absorption near-edge structure spectroscopy.

P, Oxidation of arsenopyrite y deposition of gold on the oxidised surfaces: A scanning probe microscopy, tunnelling spectroscopy y XPS study.

Acta 70, p — Aqueous pyrite oxidation by dissolved oxygen y ferric iron. Acta 51, ;p. Long-term bacterial oxidation pilot plant operation at Mintek y Vaal Reefs. Oxidation states y speciation of secondary products on pyrite y arsenopyrite reacted with mine waste waters y air. Oxidation of arsenopyrite by air y airsaturated, distilled water y implications for mechanisms of oxidation. Geomicrobiology of sulfide mineral oxidation.

Mineralogical Society of America. Bioleaching review part B: The molecular genetics of Thiobacillus ferrooxidans y other mesophilic, acidophilic, chemolithotrophic, iron or sulfur oxidizing bacteria. Heavy metal mining using microbes. Characteristics y adaptability of iron — y sulfur — oxidizing microorganisms used for the recovery of metals from minerals y their concentrates. Mag 53, p. Acta 67, p. The sulfane sulfur of persulfides is the actual substrate of the sulfur-oxidizing enzymes from Acidithiobacillus y Acidiphilium spp.


The cell attachment y oxygen consumption of two strains of Thiobacillus ferrooxidans. Sulfur chemistry, y the In direct attack mechanism- a critical evalution of bacterial leaching.

Applied Microbiology y Biotechnology. Raman study of the microbially mediated dissolution of pyrite by Thiobacillus ferrooxidans.

Colloids y Surfaces, A: Physicochemical y Engineering Aspects. Applied y Environmental Microbiology. Applied y environmental Microbiology. Intermediary sulfur compounds in pyrite oxidation: Implications for bioleaching y biodepyritization of coal.

Arsenic y selenium in microbial metabolism. Glutathione y sulfur oxidation by Thiobacillus thiooxidans. The autotrophic oxidation of iron by a new bacterium: Oxidative dissolution of arsenopyrite by mesophilic y moderately thermophilic acidophiles.

Mechanisms of bacterial oxidation of the copper sulphide mineral, covellite. Studies on the electrochemical mechanism of bacterial catalysis in pyrite dissolution. Rates of reaction of pyrite y marcasite with ferric iron at pH 2.

Metalurgistas e Ingenieros de Procesamiento de Minerales

Acta 48, ;p. The kinetics y electrochemical rate determining step of aqueous pyrite oxidation. Acta 58, ;p. A kinetic study of the oxidation of arsenopyrite in acidic solutions: Microbial leaching of metals from sulfide minerals. Servicio de ayuda de la revista. How do bacteria interact with minerals?.

Biotechnology in the Mining Industry. Microbial desulphurization of coal.