Adsorption of Iodine by ZIF Materials

Radioactive iodine present in nuclear waste water streams is harmful to human health and environment. Since iodine will exist in multiple states in water, accurate quantification of the total iodine content in any given sample is very difficult. The development of a method for determining the total iodine content accurately in water, and finding materials which can effectively remove the iodine are of particular importance. Here, a method was proposed for determining the concentration of iodine by cyclohexane extraction. And two kinds of zeolite imidazole skeleton materials ZIF-8 and ZIF-67 were prepared to be used as adsorbents to effectively adsorb iodine from an aqueous environment. Samples ZIF-8 and ZIF-67 were characterized by different methods. The results show that these two kinds of materials have good chemical structure and large specific surface area. The results of adsorption kinetics experiments show that the adsorption of ZIF-8 and ZIF-67 materials to iodine can reach the equilibrium within 60 mi