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Application of functionalized magnetic nanoparticles for the selective separation of lanthanum from solution resulting from spent catalyst leaching

Grant number: 21/15156-2
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): March 01, 2022
Effective date (End): February 29, 2024
Field of knowledge:Engineering - Chemical Engineering
Principal researcher:Jorge Alberto Soares Tenório
Grantee:Giovani Pavoski
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:19/11866-5 - Development of innovative processes for the recovery of critical metals, AP.TEM


Rare earths, such as lanthanum, are considered strategic elements of modern technology due to their essential role in processes such as petrochemical catalysis. The trend towards depletion of these elements ores makes new alternatives to be explored, such as the extraction of rare earths from residues such as spent industrial catalysts. The so-called nanohydrometallurgy allows the capture and processing of metallic elements from functionalized magnetic nanoparticles that are used for the selective separation of metals directly from aqueous solutions, without using organic solvents. Thus, this project aims to apply functionalized magnetic nanoparticles in the selective separation of critical metals, such as lanthanum, contained in spent industrial catalysts. The working solution comes from the leaching of metals from the catalysts. Batch tests will be carried out to verify optimal parameters for separation, such as pH, time, nanoparticle mass. Different analytical techniques will be used to analyze the metallic solution and characterize the nanoparticles before and after the tests. Pilot system tests may be carried out to verify the technical feasibility for future industrial applications. (AU)

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