Abstract
Flow-cell and batch test experiments were performed to determine the uranyl ion adsorption onto and/or complexation with CaF/sub 2/:Eu scintillator as a function of pH. The flow-cell experiments were modeled with an energy dispersive Monte Carlo algorithm. At pH 2, the flow-cell and batch tests gave consistent results, detection efficiency /spl sim/60% and distribution coefficient (K/sub d/) /spl sim/0.3-0.7 mL/g, with the model. At pH 8, the comparison was not as good and assumed to be due to variation in scintillator particle size realized in the experiment. From the flow-cell experiments performed at pH 8, the detection efficiency was determined to be 68% which correlated reasonably well with the model (60%). Where the experiments and model differed greatly was with K/sub d/ which was determined to be 102 and 60 for the flow-cell and batch experiments, respectively, and 0.43 from the model.
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