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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 University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.ORCID iD: 0000-0002-3049-6831
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
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2018 (English)In: Dalton Transactions, ISSN 1477-9226, E-ISSN 1477-9234, Vol. 47, no 4, p. 1312-1320Article in journal (Refereed) 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.

Place, publisher, year, edition, pages
ROYAL SOC CHEMISTRY , 2018. Vol. 47, no 4, p. 1312-1320
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Chemical Sciences Engineering and Technology
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URN: urn:nbn:se:uu:diva-346224DOI: 10.1039/c7dt04388kISI: 000423465200036PubMedID: 29300064OAI: oai:DiVA.org:uu-346224DiVA, id: diva2:1190831
Funder
EU, FP7, Seventh Framework Programme, 309373Available from: 2018-03-15 Created: 2018-03-15 Last updated: 2018-03-28Bibliographically approved

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Svedlindh, PeterWetterskog, ErikGunnarsson, Klas

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