Work

Sorption of Eu3+ on dickite particles studied by Raman, luminescence, and X-ray photoelectron spectroscopies

Year: 2007

Type: article

Abstract: The sorption of europium(III) species from EuCl 3 solution at pH = 5.4 onto dickite particles is investigated using spectroscopic methods. Thanks to the neutrality of phyllosilicate sheets of dickite, cation exchange is prevented. X-ray photoelectron spectroscopy reveals that chloride atoms probably remain in the ligand sphere of the europium(III) cation. The edge site-specific reactivity is evidenced by epifluorescence microscopy and Raman spectroscopy. Comparison between dickite/europium(III) samples rinsed or not with distilled water shows that the surface processes not only involve inner-sphere complex formation, but also either outer-sphere complex or surface precipitation. Raman spectra also indicate that europium(III) surface complexes are preferentially localised at the edge of tetrahedral silica sheets.

Source: Comptes Rendus Chimie

DOI: 10.1016/j.crci.2007.01.013

Authors: Sébastien Cremel, Otmane Zamama, Manuel Dossot, Jacques Lambert, Bernard Humbert, Jean-Jacques Ehrhardt

Institutions: Centre National de la Recherche Scientifique, Laboratoire de Chimie Physique et Microbiologie pour les Matériaux et l'Environnement

Language: English

Topic: Radioactive element chemistry and processing

Subfield: Inorganic Chemistry

Field: Chemistry

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W2048933732

FWCI: 0.705

Cites: 43

Cited by: 10

Related to: 10