铀是目前核工业中最常用的核燃料，也是最常见的污染放射性废物之一，它对人类的生存环境和健康具有潜在的危害。寻找优秀的铀固相萃取剂为解决传统吸附材料吸附容量低、选择性差等瓶颈问题，提高放射性废水中铀的回收率，不仅具有科学意义，而且对于保护环境和回收铀资源也将具有重要的应用价值。针对石墨炔在废水处理领域的研究成果较少的问题。本项目拟以聚集态结构可调控的石墨炔为研究对象，系统研究其在酸性溶液条件下对铀的吸附分离性能，分析环境因素对铀捕获能力和吸附效率的影响规律，采用模型分析和微观结构表征方法，确定石墨炔对铀的捕获机理。通过本项目的实施，制备出对铀具有高吸附性能的石墨炔固相萃取剂。总结石墨炔聚集态结构与制备反应条件之间的关联机制，揭示石墨炔吸附位点结构与铀的微观作用机制，为其在含铀放射性废水的处理领域的实际应用奠定一定的理论基础，也为提升我国在核燃料循环中相关工艺过程的技术水平提供有价值的技术支撑。

Uranium is now the most commonly used nuclear fuel in the nuclear industry, which is also the one of the most common radioactive waste that has potential risks for the human survival environment and health directly. To overcome the difficulty of the low adsorption capacity and selectivity bottlenecks of the traditional solid phase extractant and enhance uranium recovery rate from radioactive wastewater, an excellent and new solid phase extractant is needed which is of either scientific significance or practical application for protecting environment and recycling uranium resource. Graphdiyne (GDY) is an artificial synthetic carbon material which features acetylene linkages and uniformly distributed pores that has been widely applications in catalysis, Li storage, solar cells, and field emission devices. However, GDY has not been reported previously in the literature being a solid phase extractant for the treatment of radioactive wastewater. This project will focus on the synthesis of graphdiyne that its aggregation structure can be adjusted by controlling the template agent and catalyst and used it as a solid phase extractant for the removal of U(VI) from acidic radioactive wastewater. The influence of environmental factors on the capture capability and the adsorption efficiency of U(VI) are studied in detail by the batch adsorption method and column adsorption experiment. On the basis of models fitting analysis and the characterization of microstructure, the capture mechanism of U(VI) in graphdiyne is proposed. The aim of this project is to synthesize graphdiyne based solid phase extractant with high U(VI) adsorption and separation performance, to summarize the correlation mechanism of the aggregation structure of graphdiyne and the reaction conditions, to reveal the interaction mechanism between U(VI) and adsorbing sites of graphdiyne. These results will lay some theory foundation for its actual application in the treatment of uranium-bearing radioactive wastewater. In addition, it will also provide valuable technical support for the improvement of the technology level of related technological process in nuclear fuel cycle of our country.