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A platform for research: civil engineering, architecture and urbanism
Modeling of inorganic contaminant transport in dense bentonite
To assess the safety of the waste disposal site, a knowledge of the molecular diffusion coefficient through the bentonite‐clay barrier is required. The methods commonly used to determine molecular diffusion coefficient in clay are very time consuming. Because of the large number of species involved in the radioactive waste disposal site, a model that allows diffusion coefficient to be predicted for use is desirable. Models based on free water have been proposed but are found to be inadequate for compacted bentonitic clays. A model that incorporates clay‐species‐water interaction is presented for dense bentonite. The modeling results show that the diffusion coefficient depends on the charge nature and size of the diffusing species, water chemistry, temperature, and soil structure. The predicted diffusion coefficients for some species are shown to be in excellent agreement with those measured in dense bentonite.
Modeling of inorganic contaminant transport in dense bentonite
To assess the safety of the waste disposal site, a knowledge of the molecular diffusion coefficient through the bentonite‐clay barrier is required. The methods commonly used to determine molecular diffusion coefficient in clay are very time consuming. Because of the large number of species involved in the radioactive waste disposal site, a model that allows diffusion coefficient to be predicted for use is desirable. Models based on free water have been proposed but are found to be inadequate for compacted bentonitic clays. A model that incorporates clay‐species‐water interaction is presented for dense bentonite. The modeling results show that the diffusion coefficient depends on the charge nature and size of the diffusing species, water chemistry, temperature, and soil structure. The predicted diffusion coefficients for some species are shown to be in excellent agreement with those measured in dense bentonite.
Modeling of inorganic contaminant transport in dense bentonite
Cheung, S. C. H. (author)
Journal of Soil Contamination ; 3 ; 137-157
1994-06-01
21 pages
Article (Journal)
Electronic Resource
Unknown
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