• Leaching of 60Co and 137Cs from spent ion exchange resins in cement–bentonite clay matrix

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    • Keywords


      Cement; radioactive waste; composite; waste management.

    • Abstract


      The leaching rate of 60Co and 137Cs from the spent cation exchange resins in cement–bentonite matrix has been studied. The solidification matrix was a standard Portland cement mixed with 290–350 (kg/m3) spent cation exchange resins, with or without 2–5% of bentonite clay. The leaching rates from the cement–bentonite matrix for 60Co: (4,2–7,0) × 10-5 (cm/d) and 137Cs: (3,2–6,6) × 10-4 (cm/d), after 125 days were measured. From the leaching data the apparent diffusivity of cobalt and cesium in cement–bentonite clay matrix with a waste load of 290–350 (kg/m3) spent cation exchange resins, was measured for 60Co: (1,1–4,0) × 10-6 (cm2/d) and 137Cs: (0,5–2,6) × 10-4 (cm2/d), after 125 days. The results presented in this paper are part of the results obtained in a 20-year mortar and concrete testing project which will influence the design of radioactive waste management for a future Serbian radioactive waste disposal centre.

    • Author Affiliations


      I B Plecas1 R S Pavlovic1 S D Pavlovic1

      1. VINCA Institute of Nuclear Sciences, P.O. Box 522, 11001 Belgrade, Serbia and Montenegro
    • Dates

  • Bulletin of Materials Science | News

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