Potassium Zinc Hexacyanoferrate Encapsulated Hydro-Gel Beads for Removal of Radio-Cesium

S.K. Pathak1, Charu Dwivedi2, Chayan Banerjee1, K.K. Singh3, S.C. Tripathi1􀀍􀀍􀀍􀀍􀀍, Manmohan Kumar3􀀍􀀍􀀍􀀍􀀍 and P.M. Gandhi1

1Fuel Reprocessing Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India

2Indian Institute of Technology, Mandi-175 005, India

3Radiation and Photochemistry Division, Bhabha Atomic Research Centre, Trombay, Mumbai-400 085, India

Abstract

Present investigation explores the sorption potential of the indigenously synthesized potassium zinc hexacyanoferrate (KZnHCF) encapsulated calcium alginate hydro-gel beads for the removal of radio-cesium ion (137Cs) from radioactive solutions. The polyvinyl alcohol stabilized aqueous sol of KZnHCF crosslinked with alginate binding matrix yielded almost uniformly distributed fine particles of KZnHCF in the inter-penetrating network of polyvinyl alcohol and alginate polymeric chains. These hydro-gel beads were characterized by XRD, SEM, FTIR and TGA techniques. The ability of these beads for the removal of cesium ion has been studied by batch method as a function of equilibration time and pH. Even in the presence of usual interfering metal ions, like Na, Ca and Ba, the % removal of cesium ions from the solution by these beads is quite high, which establishes the potential of these beads for efficient removal of cesium ions from low level waste matrix.

Keywords

Sorption, Hydro-gel beads, Radio-cesium, Remediation, Uptake capacity.

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  • Asian J. Mat. Chem. /
  •  2016 /
  •  1(1) /
  •  pp 14-20
  • DOI:http://dx.doi.org/10.14233/ajmc.2016.AJMC-P3