Sorption competition and kinetics of trivalent cations (Eu, Y and Cm) on corundum (alpha-Al2O3 ) : A batch sorption and TRLFS study

Show full item record



Permalink

http://hdl.handle.net/10138/312580

Citation

Virtanen , S , Meriläinen , S , Eibl , M , Rabung , T , Lehto , J & Huittinen , N 2018 , ' Sorption competition and kinetics of trivalent cations (Eu, Y and Cm) on corundum (alpha-Al2O3 ) : A batch sorption and TRLFS study ' , Applied Geochemistry , vol. 92 , pp. 71-81 . https://doi.org/10.1016/j.apgeochem.2018.02.011

Title: Sorption competition and kinetics of trivalent cations (Eu, Y and Cm) on corundum (alpha-Al2O3 ) : A batch sorption and TRLFS study
Author: Virtanen, S.; Meriläinen, S.; Eibl, M.; Rabung, T.; Lehto, J.; Huittinen, N.
Contributor: University of Helsinki, Department of Chemistry
University of Helsinki, Ion exchange for nuclear waste treatment and for recycling
University of Helsinki, Laboratory of Radiochemistry (-2016)
University of Helsinki, Helmholtz-Zentrum Dresden-Rossendorf, Institute of Resource Ecology
Date: 2018-05
Language: eng
Number of pages: 11
Belongs to series: Applied Geochemistry
ISSN: 0883-2927
URI: http://hdl.handle.net/10138/312580
Abstract: Abstract In this study we have combined batch sorption and laser spectroscopic investigations to study the sorption of Eu(III) and Cm(III), on the aluminum oxide corundum in single- and multi-metal systems. Experiments were performed using a constant equilibrium time as a function of pH (pH-edges) or at constant pH as a function of equilibrium time (kinetic experiments) in 0.01 M NaClO4 and carbonate free conditions. The objective was to investigate how the sorption behavior of trivalent actinides and lanthanides is affected by the presence of another trivalent metal, Y(III). Our hypothesis was that the addition of higher concentrations of trivalent Y(III) together with a chemically similar trivalent metal, Eu(III) or Cm(III), would affect the sorption behavior of that metal. Batch experiments show that when the concentration of competing Y(III) is high enough (1 × 10−4 M) to occupy most of the surface sites, there is a clear shift in the position of the Eu(III) pH-edge to higher pH. Spectroscopic studies using time-resolved laser fluorescence spectroscopy (TRLFS) clearly confirm sorption competition between the trivalent metals Cm(III) and Y(III), but they also indicate a change in the surface speciation of the trivalent actinide in the presence of the competing metal if the concentration of that competing metal is high enough.
Subject: Sorption competition
Eu(III)
Cm(III)
Y(III)
TRLFS
Corundum
α-Al2O3
ACTINIDE IONS
ACID
alpha-Al2O3
INNER-SPHERE COMPLEXES
GAMMA-ALUMINA
HYDRATION
LASER FLUORESCENCE SPECTROSCOPY
EU(III)
SURFACE
MONTMORILLONITE
CM(III) SORPTION
116 Chemical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
1_s2.0_S0883292718300507_main.pdf 1.992Mb PDF View/Open

This item appears in the following Collection(s)

Show full item record