Neodymium removal and recovery from simulated NdFeB leachate using manganese ferrite nanoparticles
Year: 2025
Type: article
Abstract: This study explores the use of manganese ferrite nanoparticles (MnFe 2 O 4 ) for the removal and recovery of neodymium (Nd) from aqueous solutions, focusing on their potential application in wastewater treatment and environmental remediation. Neodymium, a critical element for the high-technology and energy industries, is increasingly present in aquatic environments due to its widespread use in devices such as computers, electric vehicles, and wind turbines . Through a series of kinetic, equilibrium, and desorption tests, the study optimized key operational parameters using Response Surface Methodology . Equilibrium analyses revealed that the Nd removal at equilibrium (q e ) reached 8 mg/g, while the maximum sorption capacity (q m ) was determined to be 9.2 mg/g. The results demonstrated a high removal efficiency (up to 90 %) under optimal conditions, which included a nanoparticle dose of 1000 mg/L, an initial neodymium concentration of 20 μmol/L, pH 6, and no salinity . The material showed great potential for neodymium recovery from synthetic magnet solutions, with removal rates exceeding 70 %. Desorption tests confirmed complete recyclability of the sorbent . These findings highlight manganese ferrite nanoparticles as a promising and sustainable approach for neodymium recovery.
Authors: Joana Sousa, Daniela S. Tavares, João Pinto, Bruno Henriques, João Rocha, Tito Trindade, Nuno Lapa, Eduarda Pereira
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,350
Awards: CICECO-Instituto de Materiais de Aveiro, G1240268737, G1509028180, G1792064735, G1857155500, Laboratório Associado para a Química Verde - Tecnologias e Processos Limpos, G243576772, Laboratório Associado para a Química Verde - Tecnologias e Processos Limpos, G2756637201, G2783038177, G2814222956, G3451667969, G3592153812, G3634638706, G4046065984, G4378797157, G4635501807, G5868090805, G6119126181, G6176891645, CICECO-Instituto de Materiais de Aveiro, G6463117426, G6712797660, G6944533136, G6997658380, G6997877468, G7501588509, G8213652065, G824076568, G8479097375, Laboratório Associado para a Química Verde - Tecnologias e Processos Limpos, G914451348
OpenAlex ID: W4407610542