Alkali Hydrothermal Synthesis of Zeolites from Coal Fly Ash and Their Uptake Properties of Cesium Ion

Hitoshi Mimura, Kenji Yokota, Kenichi Akiba, Yoshio Onodera

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68 Citations (Scopus)

Abstract

Zeolites were synthesized from coal fly ash by hydrothermal treatment with KOH solutions. K-H zeolite (K2Al2Si4O12-nH2O) was produced under optimum conditions of 160°C, 3 d, 1 M (=mol/dm3) KOH and liquid-solid ratio of 15cm3/g. The uptake behavior of radioactive cesium for the products was investigated by batch and column methods. The uptake equilibrium of Cs+ for the above product was attained within 2h yielding the distribution coefficient of above 104 cm3/g. The uptake of Cs+ was followed by a Langmuir adsorption isotherm and the maximum uptake capacity was estimated to be 3.34 mmol/g. The successive removal of Cs+ was accomplished through the column packed with granular composites of product-alginate gel polymer.

Original languageEnglish
Pages (from-to)766-772
Number of pages7
Journaljournal of nuclear science and technology
Volume38
Issue number9
DOIs
Publication statusPublished - 2001 Sep

Keywords

  • Alginate gel
  • Breakthrough curve
  • Cesium
  • Cesium ions
  • Column method
  • Composite materials
  • Distribution coefficient
  • Fly ash
  • Hydrothermal reaction
  • Hydrothermal synthesis
  • Langmuir adsorption isotherm
  • Polymers
  • Synthesis
  • Uptake
  • Uptake
  • Zeolite

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering

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