Prospecting bacterial consortia from a geothermal site for metals biotransformation

Autor: Rémy Guyoneaud, César A. Caretta, Marisol Goñi-Urriza, L G Hernández-Espino, João Paulo Machado Torres, M Rodríguez-Galván, Elcia M. S. Brito, Olaf Malm
Přispěvatelé: Universidad de Guanajuato, Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Universidade Federal do Rio de Janeiro (UFRJ), Institut d’Electronique et des Systèmes (IES), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Térahertz, hyperfréquence et optique (TéHO), Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)
Jazyk: angličtina
Rok vydání: 2020
Předmět:
Chromium
Acidophiles
Exopolysaccharides
Environmental Engineering
chemistry.chemical_element
Bioengineering
010501 environmental sciences
01 natural sciences
Microbiology
03 medical and health sciences
chemistry.chemical_compound
Bioremediation
Biotransformation
[CHIM.ANAL]Chemical Sciences/Analytical chemistry
Glycerol
Environmental Chemistry
Hexavalent chromium
Sulfate
0105 earth and related environmental sciences
0303 health sciences
biology
Bacteria
030306 microbiology
Sulfates
Hexavalent-chromium
[CHIM.MATE]Chemical Sciences/Material chemistry
biology.organism_classification
Pollution
Sulfur
6. Clean water
[CHIM.THEO]Chemical Sciences/Theoretical and/or physical chemistry
Biodegradation
Environmental
[CHIM.POLY]Chemical Sciences/Polymers
chemistry
Sulfate-reducing-bacteria-consortia
Environmental chemistry
Biofilms
Carbon
Oxidation-Reduction
Bioprocesses
Zdroj: Biodegradation
Biodegradation, Springer Verlag, 2020, 31, pp.235-247. ⟨10.1007/s10532-020-09906-x⟩
ISSN: 0923-9820
1572-9729
DOI: 10.1007/s10532-020-09906-x⟩
Popis: Biomats that flourished in a fumarole located on the geothermal site Los Azufres (Mexico) were used as inocula to select aerobic and sulfate-reducing bacteria consortia for studying their capacity to reduce hexavalent chromium [Cr(VI)], aiming to use these consortia in biotransformation technologies. The sample site is characterized by slightly warm (nearly 27 [Formula: see text]C), acid (pH 3) and about hypoxic (1.8 mg L[Formula: see text] of dissolved oxygen) conditions. Four culture systems (2 aerobic and 2 anaerobic) were investigated, including their enzymatic activity, capacity to produce biofilms, and an analysis of the total bacterial populations. For the anaerobic condition (using sulfate and sulfur as electron acceptors), four pH values (from 2 to 8) and four carbon sources (pyruvate, glycerol, Na-lactate and Na-acetate) were probed. Significant biological Cr(VI) removal was observed for all the pH values probed, particularly during the first 12 h, being more effective at the most acid conditions. At a pH value of 4 and using pyruvate as carbon source, 100 mg L[Formula: see text] of Cr(VI) were completely depleted in less than 12 h, while the use of Na-lactate was less effective but still reasonable. These results indicate that sulfate-reducing bacteria consortia from geothermal sites like the one studied here are capable of biotransforming Cr(VI) and have the potential to provide metal bioremediation technologies.
Databáze: OpenAIRE
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