Contrasted microbial community colonization of a bauxite residue deposit marked by a complex geochemical context.

Autor: Macías-Pérez LA; Aix Marseille Université, CNRS, IRD, INRAE, Collège de France, CEREGE, Technopôle de l'Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, France; Aix Marseille Univ, CEA, CNRS, BIAM, LEMIRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 St-Paul-lez-Durance, France. Electronic address: macias@cerege.fr., Levard C; Aix Marseille Université, CNRS, IRD, INRAE, Collège de France, CEREGE, Technopôle de l'Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, France. Electronic address: levard@cerege.fr., Barakat M; Aix Marseille Univ, CEA, CNRS, BIAM, LEMIRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 St-Paul-lez-Durance, France. Electronic address: mohamed.barakat@cea.fr., Angeletti B; Aix Marseille Université, CNRS, IRD, INRAE, Collège de France, CEREGE, Technopôle de l'Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, France. Electronic address: angeletti@cerege.fr., Borschneck D; Aix Marseille Université, CNRS, IRD, INRAE, Collège de France, CEREGE, Technopôle de l'Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, France. Electronic address: borschneck@cerege.fr., Poizat L; ALTEO Alumina, 13120 Gardanne, France. Electronic address: laurent.poizat@alteo-alumina.com., Achouak W; Aix Marseille Univ, CEA, CNRS, BIAM, LEMIRE, Laboratory of Microbial Ecology of the Rhizosphere, ECCOREV FR 3098, F-13108 St-Paul-lez-Durance, France. Electronic address: wafa.achouak@cea.fr., Auffan M; Aix Marseille Université, CNRS, IRD, INRAE, Collège de France, CEREGE, Technopôle de l'Arbois-Méditerranée, BP80, 13545 Aix-en-Provence, France; Civil and Environmental Engineering, Duke University, Durham, NC 27708, USA. Electronic address: auffan@cerege.fr.
Jazyk: angličtina
Zdroj: Journal of hazardous materials [J Hazard Mater] 2022 Feb 15; Vol. 424 (Pt B), pp. 127470. Date of Electronic Publication: 2021 Oct 11.
DOI: 10.1016/j.jhazmat.2021.127470
Abstrakt: Bauxite residue is the alkaline byproduct generated during alumina extraction and is commonly landfilled in open-air deposits. The growth in global alumina production have raised environmental concerns about these deposits since no large-scale reuses exist to date. Microbial-driven techniques including bioremediation and critical metal bio-recovery are now considered sustainable and cost-effective methods to revalorize bauxite residues. However, the establishment of microbial communities and their active role in these strategies are still poorly understood. We thus determined the geochemical composition of different bauxite residues produced in southern France and explored the development of bacterial and fungal communities using Illumina high-throughput sequencing. Physicochemical parameters were influenced differently by the deposit age and the bauxite origin. Taxonomical analysis revealed an early-stage microbial community dominated by haloalkaliphilic microorganisms and strongly influenced by chemical gradients. Microbial richness, diversity and network complexity increased significantly with the deposit age, reaching an equilibrium community composition similar to typical soils after decades of natural weathering. Our results suggested that salinity, pH, and toxic metals affected the bacterial community structure, while fungal community composition showed no clear correlations with chemical variations.
(Copyright © 2021 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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