Sorption of iodide on the surface of modified clinoptilolite

The possibility of using the monoionic Ag+ - form of clinoptilolite of domestic origin for radioactive iodide separation from waters has heen studied. The capacity of the silver form of clinoptilolite towards iodide exceeds many times that of the capacity of clinoptilolite in natural form. Due to low solubility the product Agl iodides generate precipitates on the surface of zeolite. SEM and rtg analyses of the silver form of clinoptilolite after sorption of iodide demonstrate the formation of new crystals on the zeolite surface. In comparison to the origin clinoptilolite sample, TG - analyses show that maximum water release occurs earlier. Sorption of iodide on the silver form of clinoptilolite was described as a second order reaction. The influence of interfering anions on the adsorption capacity of silver clinoptilolite towards iodide was also investigated.