Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon

Studies of thermophilic microorganisms have shown that they have a considerable biotechnological potential due to their optimum growth and metabolism at high temperatures. Thermophilic archaea have unique characteristics with important biotechnological applications; many of these species could be u...

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Detalles Bibliográficos
Autores principales:	Safar, Camila, Castro, Camila, Donati, Edgardo Rubén
Formato:	Articulo
Lenguaje:	Inglés
Publicado:	2020
Materias:	Biología Thermophiles Bioleaching Chalcopyrite Interface interactions Metals Microbial adhesion Archaea
Acceso en línea:	http://sedici.unlp.edu.ar/handle/10915/107678 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7409349&blobtype=pdf
Aporte de:	SEDICI (UNLP) de Universidad Nacional de La Plata

id	I19-R120-10915-107678
record_format	dspace
institution	Universidad Nacional de La Plata
institution_str	I-19
repository_str	R-120
collection	SEDICI (UNLP)
language	Inglés
topic	Biología Thermophiles Bioleaching Chalcopyrite Interface interactions Metals Microbial adhesion Archaea
spellingShingle	Biología Thermophiles Bioleaching Chalcopyrite Interface interactions Metals Microbial adhesion Archaea Safar, Camila Castro, Camila Donati, Edgardo Rubén Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon
topic_facet	Biología Thermophiles Bioleaching Chalcopyrite Interface interactions Metals Microbial adhesion Archaea
description	Studies of thermophilic microorganisms have shown that they have a considerable biotechnological potential due to their optimum growth and metabolism at high temperatures. Thermophilic archaea have unique characteristics with important biotechnological applications; many of these species could be used in bioleaching processes to recover valuable metals from mineral ores. Particularly, bioleaching at high temperatures using thermoacidophilic microorganisms can greatly improve metal solubilization from refractory mineral species such as chalcopyrite (CuFeS2), one of the most abundant and widespread copper-bearing minerals. Interfacial processes such as early cell adhesion, biofilm development, and the formation of passive layers on the mineral surface play important roles in the initial steps of bioleaching processes. The present work focused on the investigation of different bioleaching conditions using the thermoacidophilic archaeon Acidianus copahuensis DSM 29038 to elucidate which steps are pivotal during the chalcopyrite bioleaching. Fluorescent in situ hybridization (FISH) and confocal laser scanning microscopy (CLSM) were used to visualize the microorganism–mineral interaction. Results showed that up to 85% of copper recovery from chalcopyrite could be achieved using A. copahuensis. Improvements in these yields are intimately related to an early contact between cells and the mineral surface. On the other hand, surface coverage by inactivated cells as well as precipitates significantly reduced copper recoveries.
format	Articulo Articulo
author	Safar, Camila Castro, Camila Donati, Edgardo Rubén
author_facet	Safar, Camila Castro, Camila Donati, Edgardo Rubén
author_sort	Safar, Camila
title	Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon
title_short	Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon
title_full	Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon
title_fullStr	Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon
title_full_unstemmed	Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon
title_sort	importance of initial interfacial steps during chalcopyrite bioleaching by a thermoacidophilic archaeon
publishDate	2020
url	http://sedici.unlp.edu.ar/handle/10915/107678 http://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC7409349&blobtype=pdf
work_keys_str_mv	AT safarcamila importanceofinitialinterfacialstepsduringchalcopyritebioleachingbyathermoacidophilicarchaeon AT castrocamila importanceofinitialinterfacialstepsduringchalcopyritebioleachingbyathermoacidophilicarchaeon AT donatiedgardoruben importanceofinitialinterfacialstepsduringchalcopyritebioleachingbyathermoacidophilicarchaeon
bdutipo_str	Repositorios
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Importance of Initial Interfacial Steps during Chalcopyrite Bioleaching by a Thermoacidophilic Archaeon

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