| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Auffan, Melanie
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2022Potential of ligand-promoted dissolution at mild pH for the selective recovery of rare earth elements in bauxite residuecitations
- 2018Non-linear release dynamics for a CeO2 nanomaterial embedded in a protective wood stain, due to matrix photo-degradationcitations
- 2017Stealth Biocompatible Si-Based Nanoparticles for Biomedical Applicationscitations
- 2017Stealth Biocompatible Si-Based Nanoparticles for Biomedical Applicationscitations
- 2014Insight into mechanisms leading to the release of ceo2 nanoparticles embedded in an acrylic wood coating
- 2014Insight into mechanisms leading to the release of ceo2 nanoparticles embedded in an acrylic wood coating
- 2012Environmental fate of nanoparticles: physical chemical and biological aspects - a few snapshotscitations
- 2011TiO2-based nanoparticles released in water from commercialized sunscreens in a life-cycle perspective: Structures and quantitiescitations
- 2010Inorganic manufactured nanoparticles: how their physicochemical properties influence their biological effects in aqueous environmentscitations
- 2010Aging of TiO2 nanocomposites used in sunscreen. Dispersion and fate of the degradation products in aqueous environmentcitations
- 2007Metal oxide nanoparticles : relations between surface reactivity and the biological effects
Places of action
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article
Potential of ligand-promoted dissolution at mild pH for the selective recovery of rare earth elements in bauxite residue
Abstract
International audience ; 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