Jump to main content
Jump to site search

Issue 7, 2016
Previous Article Next Article

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

Author affiliations

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.

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

Back to tab navigation

Publication details

The article was received on 13 Feb 2016, accepted on 07 Jun 2016 and first published on 07 Jun 2016


Article type: Paper
DOI: 10.1039/C6EM00082G
Citation: Environ. Sci.: Processes Impacts, 2016,18, 802-809
  •   Request permissions

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

    H. E. Mason, J. D. Begg, R. S. Maxwell, A. B. Kersting and M. Zavarin, Environ. Sci.: Processes Impacts, 2016, 18, 802
    DOI: 10.1039/C6EM00082G

Search articles by author

Spotlight

Advertisements