Method of processing radioactive liquid wastes

Purpose: To efficiently remove radioactive metal nuclides in ionized or colloidal states by a relatively simple device and at a reduced cost even in the case where salts at a concentration are included in the radioactive liquid wastes processing. Method: Powdery or particulate materials which has capability of the adsorbing metal ions of radioactive metal nuclides through chelate-forming reactions are added and, after stirring the liquid wastes, the liquid mixture is passed through a filter device and then the liquid filtrates are again returned to the inlet for the filtering device. Filtered cakes composed of metal adsorbing materials formed on the filter elements of the filtering device are used as the filtering material for filtering to remove colloidal radioactive metal nuclides in the liquid wastes. Thus, the radioactive nuclides both in the ionized and colloidal states can be removed by utilizing the chemical and physical properties of the metal adsorbing materials, at a high speed even if high density salts are present. (Horiuchi, T.)