Abstract
This study investigated the migration and retardation of cesium in crushed granite. The main purpose was to determine whether the sorption model parameters determined from the batch experiment can be applied to estimating the transport result from the column method. Four empirical sorption models, including linear, Freundlich, Langmuir, and Elovich, were taken to fit experimental data. The batch experiment, containing both sorption and desorption experiments, was to study the sorption/desorption kinetics. While the column experiment was taken to examine, through the analysis of breakthrough curves, how flow rate would affect sorption/desorption, and as a result, the retarded migration result. Both advection-dispersion and diffusion column experiments were conducted to achieve the purpose. The Elovich model, among the four sorption models, was determined to best fit the batch experimental result. However, the fitting parameter values varied with cesium concentration. It was also determined, based on the analysis of the column experimental data, that at least two sorption reactions of different rates would contribute to the overall reaction, and none of the four empirical sorption models can adequately describe the system's sorption/desorption kinetics. Through data analysis, in the 2 cm column, the sorption parameters determined from the column experiment and in the batch experiment are similar.