Neodymium(III) and lanthanum(III) separation by magnetic nanohydrometallurgy using DTPA functionalized magnetite nanoparticles

Autor(es)

Almeida, Sabrina da N. ^[1] ; Toma, Henrique E. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Inst Quim, Sao Paulo, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: HYDROMETALLURGY; v. 161, p. 22-28, MAY 2016.
• Citações Web of Science: 10

Resumo

A successful nanohydrometallurgical separation of neodymium and lanthanum ions has been demonstrated by using superparamagnetic nanoparticles functionalized with ethylenediaminepropylsilane/ diethylenetriaminepentaacetic acid, as complexing agents. Neodymium is preferentially captured in relation to lanthanum, reflecting the trends of the stability constants dictated by the lanthanide contraction. A high separation efficiency (>99%) has been achieved after three successive complexation and releasing stages. The overall process can be performed under green and sustainable conditions, e.g., at room temperature, in aqueous solution and mild pHs, allowing the nanoparticles recycling, and dispensing the use of more time/energy consuming physical separation processes. (C) 2016 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/24725-4 - Química supramolecular e nanotecnologia
• Beneficiário: Henrique Eisi Toma
• Modalidade de apoio: Auxílio à Pesquisa - Temático