Sökning: "bentonite clay"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden bentonite clay.

  1. 1. Diffusion of Radionuclides in Bentonite Clay : Laboratory and in sity Studies

    Författare :Mats Jansson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bentonite; montmorillonite; cation; anion; diffusion; sorption; cobalt; caesium; strontium; iodide; pertechnetate; surface diffusion; in situ; Chemistry; Kemi;

    Sammanfattning : This thesis deals with the diffusion of ions in compactedbentonite clay. Laboratory experiments were performed toexamine in detail different processes that affect thediffusion. To demonstrate that the results obtained from thelaboratory investigations are valid under in situ conditions,two different kinds of in situ experiments were performed. LÄS MER

  3. 2. Geochemical modelling of groundwater chemistry in the vicinity of a repository for spent nuclear fuel

    Författare :Irene Lundén; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; groundwater; uranium; pH; Eh; PHREEQE; geochemical calculations; clay; spent nuclear fuel; standard portland cement; neptunium; rock; DISSOL; bentonite; speciation;

    Sammanfattning : .... LÄS MER

  4. 3. On the sorption and diffusion of radionuclides in bentonite clay

    Författare :Mireia Molera Marimon; KTH; []
    Nyckelord :Bentonite; cations; anions; sodium; cesium; strontium; cobalt; chloride; iodide; sorption; diffusion; cation exchange; surface complexation; ion exclusion; montmorillonite; swelling; interlayer water; interparticle water.;

    Sammanfattning : .... LÄS MER

  5. 4. Diffusion of cations in bentonite clay : laboratory and in-situ studies

    Författare :Mats Jansson; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Chemistry; Kemi;

    Sammanfattning : .... LÄS MER

  7. 5. Interfacial properties of calcium montmorillonite in aqueous solutions : Density functional theory and classical molecular dynamics studies on the electric double layer

    Författare :Guomin Yang; Göran Lindbergh; Ivars Neretnieks; Michael Holmboe; Jan Forsman; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Clay minerals; Bentonite; density functional theory; molecular dynamics; GROMACS; electric double layer; electrolytes; ionic liquids; primitive model; CLAYFF forcefield.; Chemical Engineering; Kemiteknik;

    Sammanfattning : The swelling properties of Bentonite are highly affected by clay content and the clay-water interactions that arise from the ion distribution in the diffuse double layer formed near the charged montmorillonite (or smectite) surfaces. Existing continuum models describing the electric double layers, such as classical Poisson-Boltzmann and DLVO theory, ignore the ion-ion correlations, which are especially important for multivalent ions at high surface charge and ionic strength. LÄS MER