Mild washing of uranium containing soil with citric acid combined with anion and cation exchange resin

Through mild chemical washing, costs will be saved and the soil will be protected by reducing the amount of acid used. A circulating washing system was designed to ensure the continuous washing of uranium in soil. The adsorption effect of ion exchange resin is the best when pH = 4, with a removal rate of uranium reaching 95.5%. The crystal structure of soil was nearly un-damaged, and the morphology of the metal elements was converted to a stable residue state after washing. This method is environmentally friendly and low-cost.