从放射性废水中分离Co-60既有利于资源回收，也可减少废物对生态环境的影响。但现有分离材料仍然存在吸附容量偏低、选择性差、稳定性不强等不足，难以满足对Co-60的高效分离要求。本项目拟通过有机配体的分子设计与螯合能力和材料理化性质计算，实现新型金属-有机骨架（MOFs）材料的可控制备，并探讨其对Co的吸附行为与机理，以实现溶液中Co-60的高效选择性分离。主要内容有：1）MOFs配体设计及与钴离子的螯合能力研究；2）功能化MOFs材料的制备；3）MOFs材料对溶液中Co的吸附行为研究；4）MOFs材料对Co的吸附机理研究。通过本课题，建立基于理论计算与实验相结合的MOFs制备新方法，获得耐辐照性能稳定、对Co分离性能优良的功能化MOFs新材料，了解其对Co的吸附行为与规律，揭示其吸附机理。该项目的执行不仅有望为含Co-60放射性废水的处理提供新思路，对其它重金属废水的处理研究也有借鉴意义。

As a very useful radioactive nuclide in industry, agriculture, medicine, science and other areas, Co-60 attracts growing concern in recent time, due to its long half-life and strong γ emission. Obviously, separation and enrichment of Co-60 from radioactive wastewater is beneficial to both recycle resource and eliminating the harm of radioactive waste on the ecological environment. However, the existing separation materials still suffered from low adsorption capacity, poor selectivity and stability, which are difficult to meet the efficient separation and enrichment requirements of Co-60 from aqueous solutions. Due to the superiority of metal-organic framework (MOFs) materials, such as strong functionality, high porosity, large specific surface area and adjustable pore size, this project aims to realize the controllable preparation of MOFs materials by molecular design of organic ligands and theoretical calculation for chelating ability of ligands with cobalt and the physical and chemical properties of potential materials. In addition, the adsorption behavior and mechanism of Co(II) on MOFs would be exhaustively investigated to realize the efficient and selective separation of Co-60 from aqueous solutions. The main research contents will include: 1) design of ligands and their coordination ability for cobalt; 2) controllable preparation of the novel MOFs; 3) adsorption behavior of Co(II) on the resulted MOFs materials; 4) adsorption mechanism of Co(II) on the MOFs materials. The purposes of this study are to build a new procedure based on theoretical calculation and experiments, which can lead to the controllable preparation of MOFs materials, obtained some functional MOFs materials with stable performance for radiation resistance and good separation performance for Co(II), and clearly understand the adsorption behavior and mechanism of cobalt on these novel MOFs. This project would not only provide new idea and method for the separation of Co-60 from radioactive wastewater, but also accumulate important experience for separation of other heavy metal ions in wastewater.