Electrodriven selective transport of Cs+ using chlorinated cobalt dicarbollide in polymer inclusion membrane: A novel approach for cesium removal from simulated nuclear waste solution

Sanhita Chaudhury, Arunasis Bhattacharyya, Asok Goswami

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

The work describes a novel and cleaner approach of electrodriven selective transport of Cs from simulated nuclear waste solutions through cellulose tri acetate (CTA)/poly vinyl chloride (PVC) based polymer inclusion membrane. The electrodriven cation transport together with the use of highly Cs+ selective hexachlorinated derivative of cobalt bis dicarbollide, allows to achieve selective separation of Cs+ from high concentration of Na+ and other fission products in nuclear waste solutions. The transport selectivity has been studied using radiotracer technique as well as atomic emission spectroscopic technique. Transport studies using CTA based membrane have been carried out from neutral solution as well as 0.4 M HNO3, while that with PVC based membrane has been carried out from 3 M HNO3. High decontamination factor for Cs+ over Na+ has been obtained in all the cases. Experiment with simulated high level waste solution shows selective transport of Cs+ from most of other fission products also. Significantly fast Cs+ transport rate along with high selectivity is an interesting feature observed in this membrane. The current efficiency for Cs+ transport has been found to be ∼100%. The promising results show the possibility of using this kind of electrodriven membrane transport methods for nuclear waste treatment.

Original languageEnglish
Pages (from-to)12994-13000
Number of pages7
JournalEnvironmental Science and Technology
Volume48
Issue number21
DOIs
StatePublished - 4 Nov 2014
Externally publishedYes

ASJC Scopus subject areas

  • General Chemistry
  • Environmental Chemistry

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