Synergistic aqueous biphasic systems: a new paradigm for the 'one-pot' hydrometallurgical recovery of critical metals
| Autor: | Eric Chainet, Isabelle Billard, João A. P. Coutinho, Matthieu Gras, Nicolas Schaeffer, Carlos Miguel Nóbrega Mendonça, Helena Passos, Vijetha Mogilireddy, Nicolas Papaiconomou, Eduarda Pereira |
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| Přispěvatelé: | Universidade de Aveiro, Electrochimie Interfaciale et Procédés (EIP ), Laboratoire d'Electrochimie et de Physico-chimie des Matériaux et des Interfaces (LEPMI ), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019])-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut de Chimie du CNRS (INC)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Universidade Federal de Minas Gerais [Belo Horizonte] (UFMG), Laboratoire de Chimie Moléculaire et Environnement (LCME), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
Aqueous solution Renewable Energy Sustainability and the Environment Chemistry Component (thermodynamics) General Chemical Engineering Salt (chemistry) waste electrical and electronic equipment 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences ionic liquids chemistry.chemical_compound [CHIM.GENI]Chemical Sciences/Chemical engineering Chemical engineering Ionic liquid electrodeposition Environmental Chemistry 0210 nano-technology critical metals acidic aqueous biphasic systems |
| Zdroj: | ACS Sustainable Chemistry & Engineering ACS Sustainable Chemistry & Engineering, American Chemical Society, 2019, 7 (1), pp.1769-1777. ⟨10.1021/acssuschemeng.8b05754⟩ |
| ISSN: | 2168-0485 |
| Popis: | International audience; An acidic aqueous biphasic system (AcABS), in which the inorganic salt component of a traditional aqueous biphasic system (ABS) is replaced by the inorganic acid inherently present in typical hydrometallurgical leachate solution, is shown to selectively separate cobalt from nickel, a separation relevant to the recycling of nickel metal hydride (NiMH) batteries. To overcome the limitation of electrodeposition in the presence of high acid concentration, a mixed ABS–AcABS approach is developed in which HCl is partially substituted by addition of a predictable amount of NaCl. This synergistic ABS–AcABS retains the metal extraction efficiency of AcABS while diminishing the acid concentration required to induce phase separation as well as its distribution to the ionic-liquid-rich phase. Selective deposition of cobalt in the presence of coextracted manganese impurities was achieved in AcABS, ABS, and ABS–AcABSs. The morphology and composition of the obtained deposits as well as the Faradaic efficiency of the process can be altered by varying the NaCl to HCl ratio and water content, resulting in highly tailored cobalt deposits. These results highlight the potential of AcABS-derived systems as a new extraction–separation platform for the integrated hydrometallurgical treatment of critical metals, from leaching to electrodeposition. |
| Databáze: | OpenAIRE |
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