Diffusion and Migration of Ions in Sedimentary Rock Matrix: Behaviour of Cesium and Iodide in Micropores of Sandstone

Haruo Sato, Tamotsu Muraoka

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

In-diffusion experiments for Cs+ and I- in sandstone were performed as a function of ionic strength of porewater ([NaCl]=0.01, 0.51M) and tracer concentration ([CsI]=7.5E-5, 1.5E-2M) together with the measurements of the fundamental properties of sandstone, and apparent diffusivities (Da) and rock capacity factors (α) for Cs+ were obtained. The obtained Da-values for Cs+ were scarcely dependent on [NaCl], but increased with increasing [Cs+]. This trend is consistent with that of α-values, indicating that although effective diffusivity and distribution coefficient scarcely depend on [NaCl], those depend on [Cs+]. The concentration profiles of I- were all in 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.

Original languageEnglish
Pages (from-to)541-546
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume757
Publication statusPublished - Dec 8 2003
Externally publishedYes
EventMATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDING: Scientific Basis for Nuclear Waste Management XXVI - Boston, MA, United States
Duration: Dec 2 2002Dec 5 2002

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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