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The recycling of Li\u2010ion batteries involves hydrometallurgical processes with potential environmental implications, hence there is an urgent need for sustainable and more efficient recycling methods. Functionalized colloidal magnetic nanomaterials have gained interest as sorbents as they can selectively bind and remove metal species from waters, allowing their easy recovery through magnetic separation. This work addresses the preparation and evaluation of silica\u2010coated magnetite nanoparticles (NPs), as alternative materials to recover Co and Ni from aqueous media, after their surface modification with 1\u2010methyl\u20103\u2010propylimidazolium chloride. The magnetic nanosorbents were fully characterized and the influence of solution pH and amount of ILs on the NPs surface was evaluated. Our research allows us to conclude that IL functionalized magnetic nanoparticles can be explored as an alternative to hydrometallurgical processes for the separation of Co and Ni from alkaline lixiviates of spent lithium\u2010ion battery (LIB) powders.<\/jats:p>","DOI":"10.1002\/ejic.202400237","type":"journal-article","created":{"date-parts":[[2024,7,4]],"date-time":"2024-07-04T22:20:49Z","timestamp":1720131649000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Ionic\u2010Liquid\u2010Supported Magnetic Nanoparticles: Synthesis, Characterization, and Their Use for the Separation of Co and Ni from Li in Aqueous Solutions"],"prefix":"10.1002","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0949-6351","authenticated-orcid":false,"given":"Joana C.","family":"Almeida","sequence":"first","affiliation":[{"name":"Chemistry Department and CICECO-Aveiro Institute of Materials University of Aveiro  Campus de Santiago 3810-193 Aveiro Portugal"},{"name":"Chemistry Department and LAQV-REQUIMTE University of Aveiro  Campus de Santiago 3810-193 Aveiro Portugal"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7031-2320","authenticated-orcid":false,"given":"Celso E. 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