Effect of exchangeable cations on apparent diffusion of Ca2+ ions in Na- and Ca-montmorillonite mixtures

• Published in: Physics and chemistry of the earth. Parts A/B/C Vol. 35; no. 6-8; pp. 254 - 258
• Main Authors: Kozaki, T., Sawaguchi, T., Fujishima, A., Sato, S.
• Format: Journal Article
• Language: English
• Published: 2010
• Subjects: Bentonite; Cation exchanging; Density; Diffusion; Diffusion coefficient; Drying; Equivalence; Ion exchangers; Repositories

Compacted Na-bentonite, of which the major mineral is montmorillonite, is a candidate buffer material for the geological disposal of high-level radioactive waste. A potential alteration of the bentonite in a repository is the partial replacement of the exchangeable cations of Na+ with Ca2+. The Ca2+...