银基多孔阳离子聚合物材料的设计、制备及其对129I-/129IO3-的分离性能研究

129I是一种半衰期长、毒性大、迁移性高的关键裂片核素，一旦迁移进入地下水会对生态环境及人类健康构成潜在危害。针对乏燃料后处理过程中酸性条件下高效分离129I的难题，本项目提出银基多孔阳离子聚合物材料的精准设计与可控合成策略，研究银基多孔阳离子聚合物材料的可控合成方法；评价材料在热、酸、辐照环境下稳定性；重点考察材料对129I-/129IO3-吸附性能，阐明吸附过程中129I-/129IO3-与材料骨架的吸附固化机理，可望解决目前已报道的银基材料极端环境（高温、高酸、强辐射）服役性能差的瓶颈问题。项目预期研究结果对于乏燃料后处理以及阻滞放射性核素129I在环境中的迁移扩散具有重要的理论和现实意义。

129I is one of the key nuclear fission products with a long half-life, high toxicity and high migration. Once it migrates into groundwater, it will pose potential harm to the ecological environment and human health. In order to solve the problem of highly efficient removal of 129I from highly acidic solution of spent fuel, this project proposed the precise design and controllable synthesis strategy of silver-based porous cationic polymer materials, and studied the controllable synthesis method of materials. To evaluate the stability of the material under the conditions of heat, acid and irradiation, the adsorption properties of the materials toward 129I-/129IO3- are getting investigated, and the adsorption mechanism are getting elucidated. It is expected to solve the bottleneck problem of poor performance of silver-based materials in extreme environment (high temperature, high acid and strong radiation) reported so far. The results of the project may represent great theoretical and practical significance for spent fuel reprocessing and blocking the migration of 129I in the environment.