Continuous-flow process for the separation of cesium from complex waste mixtures

S. M. Ponder, R. Helkowski, T. E. Mallouk

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

A continuous-flow process is proposed for the separation of Cs from complex, strongly alkaline, aqueous mixtures. This process, which includes the use of tetraphenylborate (TPB) anions to precipitate cesium from the bulk waste, minimizes the exposure time of TPB to the alkaline mixture by injecting TPB as a countercurrent into a small stream of the bulk waste and immediately following with filtration. The recovered solids are dissolved in propylene carbonate, and cesium is then extracted into an aqueous solution, to be later recovered as CsNO3, in a three-phase liquid - liquid - liquid extraction. Minimizing the time of exposure of TPB to strong (2 M) sodium hydroxide avoids the decomposition of TPB and subsequent release of benzene into the atmosphere above the reaction vessel.

Original languageEnglish (US)
Pages (from-to)3384-3389
Number of pages6
JournalIndustrial and Engineering Chemistry Research
Volume40
Issue number15
DOIs
StatePublished - Jul 15 2001

Fingerprint

Tetraphenylborate
Cesium
Liquids
Propylene
Precipitates
Carbonates
Benzene
Negative ions
Sodium Hydroxide
Sodium
Decomposition
Anions

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Industrial and Manufacturing Engineering

Cite this

Ponder, S. M. ; Helkowski, R. ; Mallouk, T. E. / Continuous-flow process for the separation of cesium from complex waste mixtures. In: Industrial and Engineering Chemistry Research. 2001 ; Vol. 40, No. 15. pp. 3384-3389.
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Continuous-flow process for the separation of cesium from complex waste mixtures. / Ponder, S. M.; Helkowski, R.; Mallouk, T. E.

In: Industrial and Engineering Chemistry Research, Vol. 40, No. 15, 15.07.2001, p. 3384-3389.

Research output: Contribution to journalArticle

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