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  • Author or Editor: E. Zimmerhackl x
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An application of distribution coefficients in transport models must take into account, among others, influences of solution-to-solid (V/M) ratios. Therefore, with batch tests the dependence of sorption and desorption coefficients on V/M in rock-groundwater systems of the Gorleben site was investigated. Experiments show that sorption (RS) and desorption (RD) coefficients of Ra, U, Pa and Ac decrease with decreasing liquid/solid ratios. In order to understand the V/M-effect sorption isotherms for different V/M ratios and, moreover, quantities for characterizing specific sorption of nuclides have been measured. The results allow the postulation of a model for describing approximately RS-V/M-relationships of different nuclide/rock/groundwater system with specific parameters.

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