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DTPA-Functionalized Silica Nano- and Microparticles for Adsorption and Chromatographic Separation of Rare Earth Elements
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering. Nuclear Materials Authority, P.O. Box 530, 11381 El Maadi, Cairo, Egypt.ORCID iD: 0000-0001-9390-7944
Swedish University of Agricultural Sciences, Department of Molecular Sciences, Uppsala BioCentre.
Swedish University of Agricultural Sciences, Department of Molecular Sciences, Uppsala BioCentre.
KTH, School of Engineering Sciences in Chemistry, Biotechnology and Health (CBH), Chemical Engineering.
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2018 (English)In: ACS Sustainable Chemistry & Engineering, ISSN 2168-0485, Vol. 6, no 5, p. 6889-6900Article in journal (Refereed) Published
Abstract [en]

Silica nanoparticles and porous microparticles have been successfully functionalized with a monolayer of DTPA-derived ligands. The ligand grafting is chemically robust and does not appreciably influence the morphology or the structure of the material. The produced particles exhibit quick kinetics and high capacity for REE adsorption. The feasibility of using the DTPA-functionalized microparticles for chromatographic separation of rare earth elements has been investigated for different sample concentrations, elution modes, eluent concentrations, eluent flow rates, and column temperatures. Good separation of the La(III), Ce(III), Pr(III), Nd(III), and Dy(III) ions was achieved using HNO3 as eluent using a linear concentration gradient from 0 to 0.15 M over 55 min. The long-term performance of the functionalized column has been verified, with very little deterioration recorded over more than 50 experiments. The results of this study demonstrate the potential for using DTPA-functionalized silica particles in a chromatographic process for separating these valuable elements from waste sources, as an environmentally preferable alternative to standard solvent-intensive processes.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2018. Vol. 6, no 5, p. 6889-6900
Keywords [en]
Chelation ion chromatography; Diethylenetriaminepentaacetic acid; Hybrid nanoadsorbent; Rare earth elements; Separation
National Category
Chemical Engineering Materials Chemistry
Identifiers
URN: urn:nbn:se:kth:diva-226580DOI: 10.1021/acssuschemeng.8b00725ISI: 000431927500131Scopus ID: 2-s2.0-85046140915OAI: oai:DiVA.org:kth-226580DiVA, id: diva2:1199635
Funder
Swedish Foundation for Strategic Research , IRT 11-0026EU, FP7, Seventh Framework Programme, 309373
Note

QC 20180509

Available from: 2018-04-21 Created: 2018-04-21 Last updated: 2018-05-31Bibliographically approved

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Forsberg, Kerstin

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