Diffusion and migration of ions in sedimentary rock matrix: Effects of ionic strength and tracer concentration on diffusion of Cs+ ions in sandstone

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

In-diffusion experiments for Cs+ and I- in sandstone were performed as a function of ionic strength ([NaCl]=0.01, 0.51M) and tracer concentration ([CsI]=7.5E-5, 1.5E-2M) together with the measurements of the physical and chemical properties of sandstone, and apparent diffusivities (Da) for Cs were obtained. The obtained Da-values for Cs+ scarcely depended on [NaCl], but increased with increasing [Cs+]. This trend is consistent with that of rock capacity factors (α), indicating that distribution coefficient (Kd) onto sandstone and effective diffusivity scarcely depend on [NaCl]. The concentration profiles of I- were all in already breakthrough. Although this indicates that I- diffusion is faster than that of Cs+, the concentration profiles of I may have been lower than those for blank samples, judging synthetically from the correlations between α-values and the concentration profiles of Cs + and from the concentration profiles of I- in the blank samples. Finally, the effects of [Cs+] and [NaCl] on Kd-values for Cs+ were discussed from the viewpoint of adsorption by ion exchange and electrostatic attraction. The Kd-values were considered to be combined sorption by both reactions.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
EditorsV.M. Oversby, L.O. Werme
Pages597-602
Number of pages6
Volume807
Publication statusPublished - 2004
Externally publishedYes
EventScientific Basis for Nuclear Waste Management XXVII - Kalmar, Sweden
Duration: Jun 15 2003Jun 19 2003

Other

OtherScientific Basis for Nuclear Waste Management XXVII
CountrySweden
CityKalmar
Period6/15/036/19/03

Fingerprint

Sedimentary rocks
Ionic strength
Sandstone
Ions
Chemical properties
Sorption
Electrostatics
Ion exchange
Physical properties
Rocks
Adsorption
Experiments

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials

Cite this

Sato, H. (2004). Diffusion and migration of ions in sedimentary rock matrix: Effects of ionic strength and tracer concentration on diffusion of Cs+ ions in sandstone. In V. M. Oversby, & L. O. Werme (Eds.), Materials Research Society Symposium Proceedings (Vol. 807, pp. 597-602)

Diffusion and migration of ions in sedimentary rock matrix : Effects of ionic strength and tracer concentration on diffusion of Cs+ ions in sandstone. / Sato, Haruo.

Materials Research Society Symposium Proceedings. ed. / V.M. Oversby; L.O. Werme. Vol. 807 2004. p. 597-602.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Sato, H 2004, Diffusion and migration of ions in sedimentary rock matrix: Effects of ionic strength and tracer concentration on diffusion of Cs+ ions in sandstone. in VM Oversby & LO Werme (eds), Materials Research Society Symposium Proceedings. vol. 807, pp. 597-602, Scientific Basis for Nuclear Waste Management XXVII, Kalmar, Sweden, 6/15/03.
Sato H. Diffusion and migration of ions in sedimentary rock matrix: Effects of ionic strength and tracer concentration on diffusion of Cs+ ions in sandstone. In Oversby VM, Werme LO, editors, Materials Research Society Symposium Proceedings. Vol. 807. 2004. p. 597-602
Sato, Haruo. / Diffusion and migration of ions in sedimentary rock matrix : Effects of ionic strength and tracer concentration on diffusion of Cs+ ions in sandstone. Materials Research Society Symposium Proceedings. editor / V.M. Oversby ; L.O. Werme. Vol. 807 2004. pp. 597-602
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