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Kinetics of the Bioleaching of Chalcopyrite Concentrate by Acidophilic Thermophile Acidianus brierleyi

The kinetics of leaching of high‐grade chalcopyrite (CuFeS2) concentrate (38–53 μm) by the acidophilic thermophilic bacterium, Acidianus brierleyi, was studied at 65 °C and pH 1.2 in a batch stirred reactor. The adsorption of A. brierleyi cells between the sulfide surface and solution was attained w...

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Published in:	Biotechnology progress 1999, Vol.15 (4), p.681-688
Main Authors:	Konishi, Yasuhiro, Asai, Satoru, Tokushige, Masahiko, Suzuki, Toru
Format:	Article
Language:	English
Subjects:	Absorption Acidianus brierleyi Adsorption Bacteria Biohydrometallurgy. Microbial leaching Biological and medical sciences Biotechnology Copper Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Isotherms Leaching Phase equilibria Reaction kinetics Stoichiometry Thermopiles
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container_title	Biotechnology progress
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creator	Konishi, Yasuhiro Asai, Satoru Tokushige, Masahiko Suzuki, Toru
description	The kinetics of leaching of high‐grade chalcopyrite (CuFeS2) concentrate (38–53 μm) by the acidophilic thermophilic bacterium, Acidianus brierleyi, was studied at 65 °C and pH 1.2 in a batch stirred reactor. The adsorption of A. brierleyi cells between the sulfide surface and solution was attained within the first 20 min of exposure to the mineral, and the equilibrium adsorption data were correlated with the Langmuir isotherm. The bioleaching was markedly accelerated in the presence of A. brierleyi, and greater than 90% leaching of copper in the concentrate was achieved within 10 days. The chalcopyrite leaching with A. brierleyi was found to take place with a direct attack by adsorbed cells on the mineral surface, the chemical leaching of chalcopyrite by ferric iron being insignificant. Rate data collected under a wide variety of operating variables were analyzed to determine kinetic and stoichiometric parameters for the microbial chalcopyrite leaching.
doi_str_mv	10.1021/bp9900662
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Rate data collected under a wide variety of operating variables were analyzed to determine kinetic and stoichiometric parameters for the microbial chalcopyrite leaching.</description><identifier>ISSN: 8756-7938</identifier><identifier>EISSN: 1520-6033</identifier><identifier>DOI: 10.1021/bp9900662</identifier><identifier>PMID: 10441359</identifier><identifier>CODEN: BIPRET</identifier><language>eng</language><publisher>USA: American Chemical Society</publisher><subject>Absorption ; Acidianus brierleyi ; Adsorption ; Bacteria ; Biohydrometallurgy. Microbial leaching ; Biological and medical sciences ; Biotechnology ; Copper ; Fundamental and applied biological sciences. Psychology ; Industrial applications and implications. 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The adsorption of A. brierleyi cells between the sulfide surface and solution was attained within the first 20 min of exposure to the mineral, and the equilibrium adsorption data were correlated with the Langmuir isotherm. The bioleaching was markedly accelerated in the presence of A. brierleyi, and greater than 90% leaching of copper in the concentrate was achieved within 10 days. The chalcopyrite leaching with A. brierleyi was found to take place with a direct attack by adsorbed cells on the mineral surface, the chemical leaching of chalcopyrite by ferric iron being insignificant. Rate data collected under a wide variety of operating variables were analyzed to determine kinetic and stoichiometric parameters for the microbial chalcopyrite leaching.</description><subject>Absorption</subject><subject>Acidianus brierleyi</subject><subject>Adsorption</subject><subject>Bacteria</subject><subject>Biohydrometallurgy. Microbial leaching</subject><subject>Biological and medical sciences</subject><subject>Biotechnology</subject><subject>Copper</subject><subject>Fundamental and applied biological sciences. Psychology</subject><subject>Industrial applications and implications. Economical aspects</subject><subject>Isotherms</subject><subject>Leaching</subject><subject>Phase equilibria</subject><subject>Reaction kinetics</subject><subject>Stoichiometry</subject><subject>Thermopiles</subject><issn>8756-7938</issn><issn>1520-6033</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1999</creationdate><recordtype>article</recordtype><recordid>eNqFkU9v1DAQxa0K1G4LB75AlQOqyiHUf2LHObYRbVFLadEiJC6W44wbQzYJdlaQb4-3WbVcgMPI49Fv3pPmIfSK4LcEU3JSDUWBsRB0By0IpzgVmLFnaCFzLtK8YHIP7YfwDWMssaC7aI_gLCOMFwtkr1wHozMh6W0yNpCcub4FbRrX3W9GZaNb0w-TdyMkZd8Z6EavY19NyalxdT80rnUmWTbgVw8feJg73a1DUnkHvoXJvUDPrW4DvNy-B-jz-btleZlef7x4X55ep4YXjKbWGiMzmlnOSR4LawzAa5IxkQOR3FRSAsuMocwKLOocrCUZqYmkIuI1O0BHs-7g-x9rCKNauWCgbXUH_TooSjLKJSERPP4nGM0KFo9L8X81Sc6iKGMRfDODxvcheLBq8G6l_aQIVpug1GNQkT3ciq6rFdR_kHMyEXi9BXQwurVed8aFJ64ggsuNDp2xn_Hy098N1dny9tOTeTovuTDCr8cl7b8rkbOcqy83F6o8p5cfvtIrdcd-A19mt-I</recordid><startdate>1999</startdate><enddate>1999</enddate><creator>Konishi, Yasuhiro</creator><creator>Asai, Satoru</creator><creator>Tokushige, Masahiko</creator><creator>Suzuki, Toru</creator><general>American Chemical Society</general><general>American Institute of Chemical Engineers</general><scope>BSCLL</scope><scope>IQODW</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QL</scope><scope>7QO</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>P64</scope><scope>7X8</scope></search><sort><creationdate>1999</creationdate><title>Kinetics of the Bioleaching of Chalcopyrite Concentrate by Acidophilic Thermophile Acidianus brierleyi</title><author>Konishi, Yasuhiro ; Asai, Satoru ; Tokushige, Masahiko ; Suzuki, Toru</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c5932-ffcc8424f55175510a0ee5d14367e185cb88e34cc23f606d7eff141d1826551d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Absorption</topic><topic>Acidianus brierleyi</topic><topic>Adsorption</topic><topic>Bacteria</topic><topic>Biohydrometallurgy. 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source	Wiley-Blackwell Read & Publish Collection
subjects	Absorption Acidianus brierleyi Adsorption Bacteria Biohydrometallurgy. Microbial leaching Biological and medical sciences Biotechnology Copper Fundamental and applied biological sciences. Psychology Industrial applications and implications. Economical aspects Isotherms Leaching Phase equilibria Reaction kinetics Stoichiometry Thermopiles
title	Kinetics of the Bioleaching of Chalcopyrite Concentrate by Acidophilic Thermophile Acidianus brierleyi
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