Electrochemical study of enargite bioleaching by mesophilic and thermophilic microorganisms

J. A. Muñoz; M. L. Blázquez; F. González; A. Ballester; F. Acevedo; J. C. Gentina; P. González

doi:10.1016/j.hydromet.2006.05.012

Electrochemical study of enargite bioleaching by mesophilic and thermophilic microorganisms

J. A. Muñoz, M. L. Blázquez, F. González, A. Ballester, F. Acevedo, J. C. Gentina, P. González

SCHOOL OF BIOCHEMICAL ENGINEERING

Research output: Contribution to journal › Article › peer-review

31 Scopus citations

Abstract

The bioleaching effects of two microorganisms on two different enargite (Cu₃AsS₄) minerals have been followed by solution titration and rest potential measurements and studied by cyclic voltammetry. The investigation focused on the superficial modifications produced in the minerals by the activity of the mesophilic bacterium Acidithiobacillus ferrooxidans at 35 °C and the thermophilic archaeon Sulfolobus sp. at 68 °C after 3 and 12 days of attack, comparing the modified surfaces with that of untreated samples. The electrochemical characterization of all the electrodes was done by means of potentiometric assays performed under the same conditions: acidulated deionized water as electrolyte (pH 2.0), and temperature of 26 ± 2 °C. Additionally, a comparative SEM and EDX study of untreated and biotreated samples was carried out.

Original language	English
Pages (from-to)	175-186
Number of pages	12
Journal	Hydrometallurgy
Volume	84
Issue number	3-4
DOIs	https://doi.org/10.1016/j.hydromet.2006.05.012
State	Published - Nov 2006

Keywords

Bacterial attack
Electrochemical response
Enargite
Mesophiles
Thermophiles

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10.1016/j.hydromet.2006.05.012

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title = "Electrochemical study of enargite bioleaching by mesophilic and thermophilic microorganisms",

abstract = "The bioleaching effects of two microorganisms on two different enargite (Cu3AsS4) minerals have been followed by solution titration and rest potential measurements and studied by cyclic voltammetry. The investigation focused on the superficial modifications produced in the minerals by the activity of the mesophilic bacterium Acidithiobacillus ferrooxidans at 35 °C and the thermophilic archaeon Sulfolobus sp. at 68 °C after 3 and 12 days of attack, comparing the modified surfaces with that of untreated samples. The electrochemical characterization of all the electrodes was done by means of potentiometric assays performed under the same conditions: acidulated deionized water as electrolyte (pH 2.0), and temperature of 26 ± 2 °C. Additionally, a comparative SEM and EDX study of untreated and biotreated samples was carried out.",

keywords = "Bacterial attack, Electrochemical response, Enargite, Mesophiles, Thermophiles",

author = "Mu{\~n}oz, {J. A.} and Bl{\'a}zquez, {M. L.} and F. Gonz{\'a}lez and A. Ballester and F. Acevedo and Gentina, {J. C.} and P. Gonz{\'a}lez",

year = "2006",

month = nov,

doi = "10.1016/j.hydromet.2006.05.012",

language = "English",

volume = "84",

pages = "175--186",

journal = "Hydrometallurgy",

issn = "0304-386X",

publisher = "Elsevier",

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}

TY - JOUR

T1 - Electrochemical study of enargite bioleaching by mesophilic and thermophilic microorganisms

AU - Muñoz, J. A.

AU - Blázquez, M. L.

AU - González, F.

AU - Ballester, A.

AU - Acevedo, F.

AU - Gentina, J. C.

AU - González, P.

PY - 2006/11

Y1 - 2006/11

N2 - The bioleaching effects of two microorganisms on two different enargite (Cu3AsS4) minerals have been followed by solution titration and rest potential measurements and studied by cyclic voltammetry. The investigation focused on the superficial modifications produced in the minerals by the activity of the mesophilic bacterium Acidithiobacillus ferrooxidans at 35 °C and the thermophilic archaeon Sulfolobus sp. at 68 °C after 3 and 12 days of attack, comparing the modified surfaces with that of untreated samples. The electrochemical characterization of all the electrodes was done by means of potentiometric assays performed under the same conditions: acidulated deionized water as electrolyte (pH 2.0), and temperature of 26 ± 2 °C. Additionally, a comparative SEM and EDX study of untreated and biotreated samples was carried out.

AB - The bioleaching effects of two microorganisms on two different enargite (Cu3AsS4) minerals have been followed by solution titration and rest potential measurements and studied by cyclic voltammetry. The investigation focused on the superficial modifications produced in the minerals by the activity of the mesophilic bacterium Acidithiobacillus ferrooxidans at 35 °C and the thermophilic archaeon Sulfolobus sp. at 68 °C after 3 and 12 days of attack, comparing the modified surfaces with that of untreated samples. The electrochemical characterization of all the electrodes was done by means of potentiometric assays performed under the same conditions: acidulated deionized water as electrolyte (pH 2.0), and temperature of 26 ± 2 °C. Additionally, a comparative SEM and EDX study of untreated and biotreated samples was carried out.

KW - Bacterial attack

KW - Electrochemical response

KW - Enargite

KW - Mesophiles

KW - Thermophiles

UR - http://www.scopus.com/inward/record.url?scp=33749234390&partnerID=8YFLogxK

U2 - 10.1016/j.hydromet.2006.05.012

DO - 10.1016/j.hydromet.2006.05.012

M3 - Article

AN - SCOPUS:33749234390

SN - 0304-386X

VL - 84

SP - 175

EP - 186

JO - Hydrometallurgy

JF - Hydrometallurgy

IS - 3-4

ER -

Electrochemical study of enargite bioleaching by mesophilic and thermophilic microorganisms

Abstract

Keywords

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