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      Permanent link:
      https://www.ias.ac.in/article/fulltext/jcsc/122/01/0071-0082

    • Keywords

       

      Microwave aided synthesis; SEM; EDX; XRD; HLW immobilization; leaching.

    • Abstract

       

      Microwave-assisted procedure for low temperature solid state synthesis of sodium zirconium phosphate (NZP), a material with the potential for immobilization and disposal of high level nuclear waste, was developed. Three selected fission products, namely, Cesium, Strontium and Tellurium were introduced (substituted) in the NZP matrix during its synthesis at 450°C. Leaching studies were carried out on the fission product substituted NZP sintered at 1000°C, in pure de-ionized water and 80% saturated brine solution at the ambient temperatures of 30°C and 90°C for four weeks. The major part of leaching in all the cases was observed in the first week. The extent of leaching after four weeks was found not exceeded from 12 to 15% of the elements substituted in NZP, which later became negligibly small. The effect of temperature and the nature of leachant on the leaching rate did not indicate any systematic trend. The EDX analysis of the surfaces of the leached NZP pellets showed that the leaching of the dopants is limited mainly to the surface region of the sintered pellets.

    • Author Affiliations

       

      A H Naik1 S B Deb2 A B Chalke3 M K Saxena2 K L Ramakumar2 V Venugopal4 S R Dharwadkar5

      1. The Institute of Science, 15, Madam Cama Road, Mumbai 400 032
      2. Trace Element Analysis Section, BARC, Mumbai 400 085
      3. Material Science Department, TIFR, Homi Bhabha Road, Colaba, Mumbai 400 005
      4. Radiochemistry and Isotope Group, BARC, Mumbai 400 085
      5. Department of Chemistry, University of Mumbai, Kalina, Mumbai 400 098
    • Dates

       
  • Journal of Chemical Sciences | News

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