Study on selective separation of cesium from high level liquid waste using a macroporous silica-based supramolecular recognition absorbent

Y. Wu, S. Y. Kim, D. Tozawa, T. Ito, T. Tada, K. Hitomi, E. Kuraoka, H. Yamazaki, K. Ishii

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

A macroporous silica-based supramolecular recognition absorbent (Calix[4] + Dodecanol)/SiO 2-P, was prepared by successive impregnation and fixing the 1,3-[(2,4-diethylheptylethoxy)oxy]-2,4-crown-6-Calix[4]arene (Calix[4]arene-R14) and its molecule modifier 1-Dodecanol onto SiO 2 silica-based polymer support. The characterization of (Calix[4] + Dodecanol)/SiO 2-P was examined by thermal gravimetry and differential thermal analysis and electron probe microanalysis. Relatively large separation factors of Cs and other metal ions (α Cs/M n+ ) above 60 were obtained in the presence of 3 M HNO 3. The adsorption data of Cs(I) fitted well with Langmuir isotherm and the maximum adsorption capacity was estimated to be 0.19 mmol g -1. The Cs(I) in 3 M HNO 3 were also effectively adsorption on (Calix[4] + Dodecanol)/SiO 2-P in the column operation, and the loaded Cs(I) was successfully eluted with an eluent of H 2O. The column packed with (Calix[4] + Dodecanol)/SiO 2-P had excellent reusability after three cycles.

Original languageEnglish
Pages (from-to)13-20
Number of pages8
JournalJournal of Radioanalytical and Nuclear Chemistry
Volume293
Issue number1
DOIs
Publication statusPublished - 2012 Jul 1

Keywords

  • Adsorption
  • Calix-crown
  • Cesium
  • Column
  • Equilibrium
  • High level liquid waste (HLLW)
  • Macroporous silica-based support

ASJC Scopus subject areas

  • Analytical Chemistry
  • Nuclear Energy and Engineering
  • Radiology Nuclear Medicine and imaging
  • Pollution
  • Spectroscopy
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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