In situ measurement of diffusivity

• Autorzy: Berne P. , Pocachard J.
• Języki publikacji: EN

Abstrakty

EN

The mechanism of molecular diffusion controls the migration of contaminants in very low-permeability porous media, like underground facilities for the storage of hazardous waste. Determining the relevant diffusion coefficients is, therefore, of prime importance. A few techniques exist for the in situ measurement of that quantity, but they suffer from many handicaps (duration, complexity and cost of the experiments). We propose here two innovative methods that have some potential to improve this situation. So far, we have found them feasible on the basis of design calculations and laboratory experiments. This work is presently protected by a patent.

Słowa kluczowe

EN

diffusion; porous media; in situ measurement

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2005
• Tom: Vol. 50, nr 1
• Strony: 3--7
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Berne P.

• LITEN/SAT,CEA-Grenoble - 17 rue des Martyrs, 38054 Grenoble Cedex, France, Tel.: [phone], Fax: [phone]

autor

Pocachard J.

• LITEN/SAT,CEA-Grenoble - 17 rue des Martyrs, 38054 Grenoble Cedex, France, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Leroy C, Hulin JP, Lenormand R (1992) Tracer disper-sion in stratified porous media: influence of transverse dispersion and gravity. J Contam Hydrol 11:51−68.
• 2. Palut JM, Montarnal Ph, Gautschi A, Tevissen E, Mouche E (2003) Characterisation of HTO diffusion properties by an in situ tracer experiment in Opalinus clay at Mont Terri. J Contam Hydrol 61:203−218.
• 3. Shackelford CD (1991) Laboratory diffusion testing for waste disposal – a review. J Contam Hydrol 7:177−217.
• 4. Young DF, Ball WP (1998) Estimating diffusion coefficients in low-permeability porous media using a macro-pore column. Environ Sci Technol 32:2578−2584