NDLI: A novel solid-state NMR method for the investigation of trivalent lanthanide sorption on amorphous silica at low surface loadings

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Environmental Science: Processes & Impacts Vol - 18 Issue - 6

Environmental Science: Processes & Impacts Vol - 18 Issue - 5

A novel solid-state NMR method for the investigation of trivalent lanthanide sorption on amorphous silica at low surface loadings

Content Provider	Royal Society of Chemistry (RSC)
Author	Maxwell, R. S. Kersting, A. B. Zavarin, M. Begg, J. D. Mason, H. E.
Copyright Year	2016
Abstract	The modelling of radionuclide transport in the subsurface depends on a comprehensive understanding of their interactions with mineral surfaces. Spectroscopic techniques provide important insight into these processes directly, but at high concentrations are sometimes hindered by safety concerns and limited solubilities of many radionuclides, especially the actinides. Here we use Eu(III) as a surrogate for trivalent actinide species, and study Eu(III) sorption on the silica surface at pH 5 where sorption is fairly limited. We have applied a novel, surface selective solid-state nuclear magnetic resonance (NMR) technique to provide information about Eu binding at the silica surface at estimated surface loadings ranging from 0.1 to 3 nmol m−2 (<0.1% surface loading). The NMR results show that inner sphere Eu(III) complexes are evenly distributed across the silica surface at all concentrations, but that at the highest surface loadings there are indications that precipitates may form. These results illustrate that this NMR technique may be applied in solubility-limited systems to differentiate between adsorption and precipitation to better understand the interactions of radionuclides at solid surfaces.
Starting Page	802
Ending Page	809
Page Count	8
File Format	HTM / HTML PDF
ISSN	20507887
Volume Number	18
Issue Number	7
Journal	Environmental Science: Processes & Impacts
DOI	10.1039/c6em00082g
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Radionuclide Mineral Actinide Sorption Silicon dioxide PH Solid-state nuclear magnetic resonance Nuclear magnetic resonance Adsorption
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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