Clay as a potential humic colloid source - implications for nuclear waste disposal

Informations projet

FRANCIS CLARET

N° de convention de subvention: FIKW-CT-2002-50509

Projet clôturé

Date de début 1 Août 2002

Date de fin 31 Juillet 2004

Financé au titre de

• Research and training programme (Euratom) in the field of nuclear energy (1998 to 2002)

Coût total € 147 150,00

Contribution de l’UE € 147 150,00

Coordonné par

FORSCHUNGSZENTRUM KARLSRUHE GMBH - TECHNIK UND UMWELT
Germany

Objectif

The objective is to investigate the potential for conversion of clay organic matter into dissolved humicor humic alike substances under conditions relevant for nuclear waste disposal in the presence of cement. The project is based on preliminary investigations under aerobic conditions with clay rich inorganic matter that has not been consolidated under elevated temperatures. In the present project, investigations will be extended to anoxic conditions and clays with high temperature consolidated clay organic matter.
Two different clays are contacted with alkaline solution up to around 550 days. The alkaline solution reflects conditions resulting from cement dissolution. The generation of humic substances is monitored and important properties for radio nuclide complexation and mobility are determined. This includes determination of functional group content (proton exchange capacity), actinide complexation studies. molecular mass and size distribution. Simultaneously, the morphology of clay during the alkaline treatment is studied as well as the generation of new phases. Generation and characterization of clay mineral colloids is also studied. Results are interpreted in view of the potential: impact on actinide mobility in the near field of disposed radioactive waste.

Champ scientifique (EuroSciVoc)

CORDIS classe les projets avec EuroSciVoc, une taxonomie multilingue des domaines scientifiques, grâce à un processus semi-automatique basé sur des techniques TLN.

• ingénierie et technologie › autres génies et technologies › ingénierie nucléaire › gestion des déchets nucléaires
• ingénierie et technologie › génie de l'environnement › gestion des déchets
• sciences naturelles › sciences physiques › physique de la matière condensée › physique de la matière molle

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Programme(s)

• FP5-EAECTP C - Research and training programme (Euratom) in the field of nuclear energy (1998 to 2002)

Thème(s)

• 2.1.2. - Key action Nuclear Fission

Appel à propositions

Data not available

Régime de financement

RGI - Research grants (individual fellowships)

Coordinateur

FORSCHUNGSZENTRUM KARLSRUHE GMBH - TECHNIK UND UMWELT

• Contribution de l’UE: Aucune donnée
• Adresse: Herrmann-von-Helmholtz-Platz 1 ; 76344 EGGENSTEIN-LEOPOLDSHAFEN ; Allemagne
• Coût total: Aucune donnée