Selective uptake of cesium by ammonium tungstophosphate (AWP) - Calcium alginate composites

Hitoshi Mimura, Mikio Saito, Kenichi Akiba, Yoshio Onodera

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The fine crystals of ammonium tungstophosphate (AWP) exchanger were immobilized in the biopolymer consisting of calcium alginate (CaALG) gels. The uptake rate of Cs+ for the AWP-CaALG composite was fairly fast and the uptake percentage of Cs+ was above 90% within 30 min even in the presence of 5 M HNO3. In a wide HNO3 concentration region of 0.1 - 5 M, the distribution coefficient of Cs- for the composite was about 104 cm3/g, while those for other nuclides, Na+, Sr2-, Co2+, Eu3+ and Am3+, were less than 10 cm3/g. The uptake of Cs+ followed a Langmuir-type adsorption equation, and the maximum uptake capacity of Cs+ increase with the content of AWP immobilized in the composite. The trace amounts of 137Cs in the presence of 5 M NaNO3-1 M HNO3 were selectivity adsorbed on the composite column. The AWP-CaALG composite proved to be effective for the selective removal of radioactive cesium from waste solutions containing HNO3 and NaNO3.

Original languageEnglish
Pages (from-to)1015-1027
Number of pages13
JournalSolvent Extraction and Ion Exchange
Volume18
Issue number5
DOIs
Publication statusPublished - 2000 Jan 1

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)

Fingerprint Dive into the research topics of 'Selective uptake of cesium by ammonium tungstophosphate (AWP) - Calcium alginate composites'. Together they form a unique fingerprint.

  • Cite this