Removal of heat-generating nuclides from high-level liquid wastes through mixed zeolite columns

Hitoshi Mimura, Kenichi Akiba, Hiroshi Igarashi

研究成果: Article査読

28 被引用数 (Scopus)

抄録

The simultaneous removal of heat-generating nuclides Cs and Sr from high-level liquid wastes was achieved through columns packed with mixed zeolites of ferrierite (F) and zeolite A (A). A simulated waste solution was efficiently denitrated with formic acid up to pH 6.5- 8.3 in the region of the initial molar ratio of (HCOOH)/(HN03) from 2.3 to 2.7. Large portions of multivalent nuclides including lanthanoids and actinoids were filtered off as precipitates in this pH region. Both Cs and Sr remaining in the nitrate were then completely removed by passing through the column packed with mixed zeolites. Break points for a column with an appropriate mixing ratio of A: F=2: 3 were found to be 12.6 bed volumes (BV) for Cs and 11.0BV for Sr; the amounts of Cs and Sr adsorbed were estimated to be 0.28 and 0.12 mmol/g, respectively. The mixed zeolites adsorbing Cs and Sr were readily converted into a solid form by calcination at 1,200°C.

本文言語English
ページ(範囲)239-247
ページ数9
ジャーナルjournal of nuclear science and technology
30
3
DOI
出版ステータスPublished - 1993 3月
外部発表はい

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学
  • 原子力エネルギーおよび原子力工学

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