Bacterial metabolites and particle size determine cerium oxide nanomaterial biotransformation
| Autor: | Blanche Collin, Mélanie Auffan, Emmanuel Doelsch, Olivier Proux, Isabelle Kieffer, Philippe Ortet, Catherine Santaella |
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| Přispěvatelé: | Centre européen de recherche et d'enseignement des géosciences de l'environnement (CEREGE), Institut de Recherche pour le Développement (IRD)-Aix Marseille Université (AMU)-Collège de France (CdF (institution))-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Recyclage et risque (UPR Recyclage et risque), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Département Performances des systèmes de production et de transformation tropicaux (Cirad-PERSYST), European Synchroton Radiation Facility [Grenoble] (ESRF), Institut de Biosciences et Biotechnologies d'Aix-Marseille (ex-IBEB) (BIAM), Aix Marseille Université (AMU)-Centre National de la Recherche Scientifique (CNRS)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Bioconversion
[SDV]Life Sciences [q-bio] Metal Nanoparticles Détoxification nanoparticules Soil Pseudomonas Environmental Chemistry Particle Size Bacteria Cerium General Chemistry Décontamination chimique Expérimentation in vitro Nanostructures Expérimentation en laboratoire Spectroscopie aux rayons x [SDE]Environmental Sciences P02 - Pollution |
| Zdroj: | Environmental Science and Technology Environmental Science and Technology, 2022, 56 (23), pp.16838-16847. ⟨10.1021/acs.est.2c05280⟩ |
| ISSN: | 0013-936X 1520-5851 |
| DOI: | 10.1021/acs.est.2c05280⟩ |
| Popis: | International audience; Soil is a major receptor of manufactured nanomaterials (NMs) following unintentional releases or intentional uses. Ceria NMs have been shown to undergo biotransformation in plant and soil organisms with a partial Ce(IV) reduction into Ce(III), but the influence of environmentally widespread soil bacteria is poorly understood. We used high-energy resolution fluorescencedetected X-ray absorption spectroscopy (HERFD-XAS) with an unprecedented detection limit to assess Ce speciation in a model soil bacterium (Pseudomonas brassicacearum) exposed to CeO2 NMs of different sizes and shapes. The findings revealed that the CeO2 NM’s size drives the biotransformation process. No biotransformation was observed for the 31 nm CeO2 NMs, contrary to 7 and 4 nm CeO2 NMs, with a Ce reduction of 64 ± 14% and 70 ± 15%, respectively. This major reduction appeared quickly, from the early exponential bacterial growth phase. Environmentally relevant organic acid metabolites secreted by Pseudomonas, especially in the rhizosphere, were investigated. The 2- keto-gluconic and citric acid metabolites alone were able to induce a significant reduction in 4 nm CeO2 NMs. The high biotransformation measured for |
| Databáze: | OpenAIRE |
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