Long-chain ligand design in creating magnetic nano adsorbents for separation of REE from LTM

Mezy, Aude; Vardanyan, Ani; Garcia, Adeline; Schmitt, Celine; Lakic, Marijana; Krajnc, Sara; Daniel, Geoffrey; Kosak, Aljosa; Lobnik, Aleksandra; Seisenbaeva, Gulaim A.

doi:10.1016/j.seppur.2021.119340

Research article2021Peer reviewedOpen access

Long-chain ligand design in creating magnetic nano adsorbents for separation of REE from LTM

Mezy, Aude; Vardanyan, Ani; Garcia, Adeline; Schmitt, Celine; Lakic, Marijana; Krajnc, Sara; Daniel, Geoffrey; Kosak, Aljosa; Lobnik, Aleksandra; Seisenbaeva, Gulaim A.

Abstract

A series of magnetic adsorbents was created by grafting selected functional ligands directly on the surface of iron oxide nanoparticles (NP). The produced materials were characterized by SEM-EDS, TEM, AFM, FTIR, XRD, Mo center dot ssbauer spectroscopy, low temperature gas sorption, and in relation to functional properties. Each of the applied ligands carried two functional groups including phosphonic acid involved in grafting, and either alcohol, thiol, amino, carboxylic- or phosphonic acid. The kinetics and thermodynamics of metal cation adsorption were investigated for Rare Earth (REE, Sm3+, Nd3+, Dy3+ and Tb3+) and Late Transition Metals (LTM, Co2+ and Ni2+) as representative for the content of magnetic materials, requiring recycling. Long linear alkyl chain (C10-C12) and, in case of phosphonic acid, even a shorter one (C6), were used to trace potential stabilization of the particles against iron leaching on desorption of adsorbed cations in acidic medium. The NP demonstrated high adsorption capacity, efficient desorption and considerable selectivity in separation of REE from LTM. Modification with ligands offers appreciable protection of magnetic particles against iron leaching.

Keywords

Recycling of magnets; Magnetic nanoadsorbent; Functional ligand; Surface complexation; Critical elements

Published in

Separation and Purification Technology
2021, volume: 276, article number: 119340
Publisher: ELSEVIER

SLU Authors

Vardanyan, Ani
- Department of Molecular Sciences, Swedish University of Agricultural Sciences
Daniel, Geoffrey
- Department of Forest Biomaterials and Technology, Swedish University of Agricultural Sciences
Seisenbaeva, Gulaim
- Department of Molecular Sciences, Swedish University of Agricultural Sciences

Global goals (SDG)

SDG12 Responsible consumption and production

UKÄ Subject classification

Materials Chemistry

Publication identifier

DOI: https://doi.org/10.1016/j.seppur.2021.119340

Permanent link to this page (URI)

https://res.slu.se/id/publ/113142