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Mobility of 137Cs related to speciation studies in contaminated soils of the Chernobyl area.


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Gri, N.; Stammose, D.; Guillou, Ph. Journal of Radioanalytical and Nuclear Chemistry v. 246(2) p. 403-409.

Type de document > *Article de revue

Mots clés > déchets radioactifs : stockage de surface et sites pollués, césium, site pollué, spéciation

Unité de recherche > IRSN/DEI/SARG/LETS

Auteurs > STAMMOSE Denise

Date de publication > 01/11/2000

Résumé

Chernobyl derived 137Cs present in upper soil layers can still remain available to cation exchange and hence to downward migration. More than its physico-chemical deposit forms (fuel particles and/or condensed aerosols), radiocesium mobility is influenced by soil properties. Although all the soils studied contain illitic clay minerals, different 137Cs fixation levels were observed due to: (1) the reactivity state of sorption sites with a low radiocesium content in soil, and (2) the presence, or absence, of organic matter complexes inhibiting cation sorption on clays.