Tailoring Nanoadsorbent Surfaces: Separation of Rare Earths and Late Transition Metals in Recycling of Magnet Materials

Sammanfattning

Novel silica-based adsorbents were synthesized by grafting the surface of SiO2 nanoparticles with amine and sulfur containing functional groups. Produced nanomaterials were characterized by SEM-EDS, AFM, FTIR, TGA and tested for adsorption and separation of Rare Earth Elements (REE) (Nd3+ and Sm3+) and Late Transition Metals (LTM) (Ni2+ and Co2+) in single and mixed solutions. The adsorption equilibrium data analyzed and fitted well to Langmuir isotherm model revealing monolayer adsorption process on homogeneously functionalized silica nanoparticles (NPs). All organo-silicas showed high adsorption capacities ranging between 0.5 and 1.8 mmol/g, depending on the function and the target metal ion. Most of these ligands demonstrated higher affinity towards LTM, related to the nature of the functional groups and their arrangement on the surface of nanoadsorbent.

Nyckelord

recycling; silica nanoadsorbents; adsorption; REE; LTM; functional ligands

Publicerad i

Nanomaterials
2022, volym: 12, nummer: 6, artikelnummer: 974
Utgivare: MDPI

SLU författare

• Vardanyan, Ani

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

• Guillon, Anna

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

• Seisenbaeva, Gulaim

  • Institutionen för molekylära vetenskaper, Sveriges lantbruksuniversitet
    

Globala målen (SDG)

SDG6 Rent vatten och sanitet för alla
SDG12 Hållbar konsumtion och produktion

UKÄ forskningsämne

Materialkemi

Publikationens identifierare

• DOI: https://doi.org/10.3390/nano12060974

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/116795