Nanohydrometallurgy with Superparamagnetic Nanoparticles: A Sustainable Solution for Critical Metal Retrieval from Phosphogypsum

Autor(es)

Pavoski, Giovani ; Espinosa, Denise Crocce Romano ; Tenorio, Jorge Alberto Soares ; Liu, Wenying

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF SUSTAINABLE METALLURGY; v. N/A, p. 15-pg., 2025-04-07.

Resumo

This study evaluates the efficiency and selectivity of nanohydrometallurgy for the recovery of critical metals from phosphogypsum leachates using functionalized superparamagnetic nanoparticles (Si@Fe-DTPA). The extraction process was tested in monometallic, multimetallic, and leachate synthetic solutions containing Ce, Dy, La, Nd, and Y. The results demonstrated that selective separation is achievable, with extraction efficiencies of 17.59% for Ce, 5.96% for Dy, 13.74% for La, 19.83% for Nd, and 12.93% for Y in a single cycle. The selectivity order for Si@Fe-DTPA was Nd > Y > La > Dy > Ce, confirming its preferential affinity for specific rare earth elements. The contaminant metal Ca, present in the highest concentration, was efficiently removed within three cycles. The overall process required 10 to 20 cycles to obtain high-purity fractions of critical metals. The findings confirm that nanohydrometallurgy is a sustainable and effective technique for critical metal recovery, offering an alternative to traditional extraction methods and contributing to the circular economy. This approach aligns with the United Nations Sustainable Development Goals (SDGs) by reducing dependence on primary mining sources and promoting resource efficiency. (AU)

• Processo FAPESP: 21/15156-2 - Aplicação de nanopartículas magnéticas funcionalizadas para a separação seletiva de lantânio de solução proveniente da lixiviação de catalisadores gastos
• Beneficiário: Giovani Pavoski
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 23/01064-4 - Nanohidrometalurgia aplicando nanopartículas magnéticas na recuperação de metais críticos
• Beneficiário: Giovani Pavoski
• Modalidade de apoio: Bolsas no Exterior - Estágio de Pesquisa - Pós-Doutorado
• Processo FAPESP: 19/11866-5 - Desenvolvimento de processos inovadores para recuperação de metais críticos
• Beneficiário: Denise Crocce Romano Espinosa
• Modalidade de apoio: Auxílio à Pesquisa - Temático