Abstract
The leaching behavior of α-emitter radionuclides (uranium and americium) from zeolite-L and the zeotype (SAPO-34) in a Flexcrete-cement matrix were examined by static and dynamic methods using 0.005M CaCl2 and synthetic ground water as leachants. The leaching rates of UO 2+2 were found to be higher by about ten orders of magnitude than those of Am3+ for both zeolite-L and SAPO-34 in the cement matrix. The static and dynamic leaching rates of UO 2+2 for SAPO-34 in CaCl2 and synthetic ground water were ten orders of magnitude lower than those for L. SAPO-34 showed good selectivity for uranium at pH 2–3.5 and L was usefully selective for Am3+. Distribution coefficients of Am3+ and UO 2+2 increased with equilibrium pH.
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Amini, S., Dyer, A. & Durrani, S.K. Fixation of actinide elements into zeolites/zeotypes and Flexcrete-cement matrix. Journal of Radioanalytical and Nuclear Chemistry, Articles 173, 331–337 (1993). https://doi.org/10.1007/BF02043035
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DOI: https://doi.org/10.1007/BF02043035