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Coordination of rare earth element cations on the surface of silica-derived nanoadsorbents
Swedish Univ Agr Sci SLU, Dept Mol Sci, Box 7015, S-75007 Uppsala, Sweden..
Swedish Univ Agr Sci SLU, Dept Mol Sci, Box 7015, S-75007 Uppsala, Sweden..
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik.ORCID-id: 0000-0002-3049-6831
Uppsala universitet, Teknisk-naturvetenskapliga vetenskapsområdet, Tekniska sektionen, Institutionen för teknikvetenskaper, Fasta tillståndets fysik.
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2018 (engelsk)Inngår i: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 47, nr 4, s. 1312-1320Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

Silica (SiO2)-derived nanoadsorbents are a powerful and attractive tool for the extraction and separation of rare earth elements (REE) from many perspectives such as reusability, efficiency and minimum impact on the environment. In the present work, we investigated two different methods of adsorption down to the molecular level: (1) the mechanism of the coordination of different groups of REE (light, medium, heavy) with iminodiacetic acid (IDA) was revealed by exploiting models obtained from X-ray crystallography, explaining the selectivity of this type of ligand, and (2) the mechanism of the seeding of RE(OH)(3) initiated by SiO2-based nanoadsorbents was investigated by EXAFS, both individually and in combination with mechanism (1), showing the coexistence of both mechanisms. The REE loaded nanoadsorbents possess a high magnetic susceptibility. This property was studied by magnetometry to quantify the REE adsorption efficiency and compared with the values obtained from complexometry.

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ROYAL SOC CHEMISTRY , 2018. Vol. 47, nr 4, s. 1312-1320
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Identifikatorer
URN: urn:nbn:se:uu:diva-346224DOI: 10.1039/c7dt04388kISI: 000423465200036PubMedID: 29300064OAI: oai:DiVA.org:uu-346224DiVA, id: diva2:1190831
Forskningsfinansiär
EU, FP7, Seventh Framework Programme, 309373Tilgjengelig fra: 2018-03-15 Laget: 2018-03-15 Sist oppdatert: 2018-03-28bibliografisk kontrollert

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