Distribution and fixation of cesium and strontium in zeolite a and chabazite

Hitoshi Mimura, Takuji Kanno

Research output: Contribution to journalArticlepeer-review

122 Citations (Scopus)

Abstract

The selective removal and fixation of Cs and Sr have been studied in zeolite A and chabazite. Cesium ion was preferentially distributed into chabazite with a high distribution coefficient (KCS>103 cm3 g–1) in the presence of NaCl (10–1 mol dm–3). The KSr values for zeolite A attained about 103 cm3 g–1 in the pH range of 8˜10, and they gradually decreased with an decrease in pH. The initial rate of Cs adsorption was fairly fast in chabazite, and the adsorption ratio reached almost 100% within a few hours. The adsorption ratio of Sr in binderless A zeolite reached almost 100% after 15 h. The adsorption of Cs and Sr on these zeolites was followed by Langmuir-type isotherm. Cesium forms of these zeolites recrystallized to pollucite (CsAISi2O6) above 900°C for zeolite A and above 1,200°C for chabazite. As for Sr forms, these zeolites changed to SrAl2Si2O8 above 900°C. These recrystallized phases were suitable hosts for the immobilization of Cs and Sr in the nuclear waste solutions.

Original languageEnglish
Pages (from-to)284-291
Number of pages8
Journaljournal of nuclear science and technology
Volume22
Issue number4
DOIs
Publication statusPublished - 1985 Apr

Keywords

  • Adsorption rate. Langmuir-type isotherm
  • Cesium
  • Chabazite
  • Distribution
  • Fixation
  • Immobilization
  • PH value
  • Pollucite
  • Strontium
  • Strontium aluminum silicate
  • Zeolite A

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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