Potential of Ligand-Promoted Dissolution at Mild pH for the Selective Recovery of Rare Earth Elements in Bauxite Residues
| Autor: | Claire Lallemand, Jean Paul Ambrosi, Daniel Borschneck, Bernard Angeletti, Perrine Chaurand, Andrea Campos, Morgane Desmau, Till Fehlauer, Mélanie Auffan, Jérôme Labille, Nicolas Roche, Laurent Poizat, Blanche Collin, Jérôme Rose, Clément Levard |
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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), Centre Pluridisciplinaire de Microscopie Electronique et de Microanalyse (AMU CP2M), Aix Marseille Université (AMU), Deutsches Elektronen-Synchrotron [Zeuthen] (DESY), Helmholtz-Gemeinschaft = Helmholtz Association, Université Mohammed VI Polytechnique [Ben Guerir] (UM6P), ALTEO, ANR-11-LABX-0010,DRIIHM / IRDHEI,Dispositif de recherche interdisciplinaire sur les Interactions Hommes-Milieux(2011), ANR-20-CE04-0007,RECALL,Extraction durable de métaux de valeur dans les résidus de bauxite(2020) |
| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
OHM Bassin Minier de Provence
[SDE.IE]Environmental Sciences/Environmental Engineering Renewable Energy Sustainability and the Environment Characterization Speciation General Chemical Engineering Ligand-promoted Dissolution General Chemistry Rare Earth Elements (REEs) [CHIM.INOR]Chemical Sciences/Inorganic chemistry [CHIM.GENI]Chemical Sciences/Chemical engineering Bauxite Residue (BR) ddc:540 Low Molecular Weight Organic Acids (LMWOAs) Environmental Chemistry Circular Economy Critical Elements |
| Zdroj: | ACS sustainable chemistry & engineering 10(21), 6942-6951 (2022). doi:10.1021/acssuschemeng.1c08081 ACS Sustainable Chemistry & Engineering ACS Sustainable Chemistry & Engineering, In press, ⟨10.1021/acssuschemeng.1c08081⟩ |
| ISSN: | 2168-0485 |
| DOI: | 10.1021/acssuschemeng.1c08081 |
| Popis: | ACS sustainable chemistry & engineering 10(21), 6942 - 6951 (2022). doi:10.1021/acssuschemeng.1c08081 In a context of overexploitation of natural resources, a circular economy and particularly the extraction of resources from secondary sources are essential to sustain a number of key technologies including renewable energies. Among secondary sources, the bauxite residue contains critical elements including rare earth elements (REEs) (712 mg/kg). We investigated the use of soft and selective dissolution protocols at mild pH values (2–6) as an alternative to pyro- and hydrometallurgy for the recovery of REEs through ligand-promoted dissolution. This approach depends on the detailed characterization of the waste and the speciation of targeted elements. We assessed dissolution using low-molecular-weight organic acids and their conjugate bases. Citric acid/citrate showed satisfactory dissolution of REEs (up to 50% of light REEs) up to a pH of nearly 5, while tartaric acid/tartrate showed the best dissolution selectivity (enrichment factor up to 21.5 compared to Fe, Al, and Ti). Almost no heavy REEs were dissolved in any of the conditions tested, probably due to the high chemical stability of their bearing phases. Indeed, heavy REEs were found as discrete phosphate particles. Published by ACS Publ., Washington, DC |
| Databáze: | OpenAIRE |
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