| Title | Nanohydrometallurgy with superparamagnetic nanoparticles for selective separation of lanthanum from a real spent catalyst |
|---|---|
| ID_Doc | 29148 |
| Authors | Pavoski, G; Toma, HE; Espinosa, DCR; Tenório, JAS |
| Title | Nanohydrometallurgy with superparamagnetic nanoparticles for selective separation of lanthanum from a real spent catalyst |
| Year | 2024 |
| Published | Journal Of Material Cycles And Waste Management, 26.0, 5 |
| Abstract | The development of new methodologies and sustainable processes is a priority in the field of chemical engineering and nanotechnology. In this study, via an easy route, the nanohydrometallurgy process was applied to recover La from a real spent catalyst. The synthesis of superparamagnetic iron nanoparticles (Si@FeNPs) with different precursors was evaluated. The average particle diameter value was smaller when using sulfate precursors. La acid leaching extracted 76% and required process adjustments. The nanohydrometallurgy process separated La from the Ni present in the leach solution with 6 cycles. Therefore, two processes were proposed. The first is obtaining a product with 97% of La and Al as a contaminant. The second with 99% La purity. Nanohydrometallurgy proved to be an innovative and sustainable process, with the recyclability of Si@FeNPs, obtaining La from a secondary source. In this way, this nanohydrometallurgy process meets the concepts of circular economy and encompasses sustainable development goals (SDGs) nine and twelve of the United Nations. |
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