Large-scale adsorption/elution cycles were performed to investigate the long-term stability of the chelating resins employed. The adsorbed metal ions were rapidly and quantitatively eluted from the resins with acid eluants. The shrinkage of the resins with successive adsorption/elution cycles influenced the adsorption capacity. The uranium recovery was maintained at a nearly constant value by the employment of bicarbonate eluants. In particular, 2 mol dm-3 NH4HCO3 yielded an efficient stripping for uranium. However, it was clarified that the elution with 0.25 mol dm-3 H2SO4, which gave a high efficiency, was better than the bicarbonate eluants.