本项目结合目前我国大力发展核电但铀资源相对不足的现状提出，拟利用电子束辐照的方法在微生物上接枝偕胺肟基，制备新型生物吸附剂，从而实现对含铀放射性废水中铀的选择性回收，具有保护环境和节约能源双重意义。项目主要以啤酒厂灭活酿酒酵母为原始菌体，通过辐照接枝条件和胺肟化反应条件优化研究，得到制备偕胺肟基接枝新型生物吸附剂的工艺流程，同时为微生物的改性研究提供新的思路；研究多种外部因素如溶液酸度、吸附时间、铀浓度等对该新型生物吸附剂吸附铀的影响，并通过与原始菌体吸附铀的情况进行对比，确定其对铀吸附选择性增加的程度；在此基础上，利用多种分析手段，探索偕胺肟基接枝微生物吸附铀的机理，为该新型生物吸附剂应用于实际含铀废水处理提供理论基础和实验支持。项目研究中利用电子束辐照的方法实现微生物的偕胺肟基接枝，是十分有创新性的大胆尝试，至今未见报道。

Basing on the current conflict between urgent development of nuclear power supply and limited uranium resource in our country, this project is proposed. A new-typed biosorbent grafted with amidoxime group will be prepared by using electron beam irradiation method and used for selective uranium recovery from uranium wastewater. It is meaningful in both environmental protection and energy conservation if this project is performed. Dead Saccharomyces cerevisiae obtained from beer brewery is used as raw biomass, the way used for producing amidoxime grafted biosorbent is achieved after optimizing the irradiation grafting and amidoximation conditions. Meanwhile, a fresh approach used for microbiology modification is also provided. The effect of solution pH, time and uranium concentration etc. on uranium sorption by this new-type biosorbent is studied; the enhanced selectivity of this new-typed biosorbent for uranium is determined by comparing the sorption results with raw biomass. Furthermore, various analysis methods are applied to study the sorption mechanism involved. All the results attained will give some basic information on theoretical and experimental application of this new-typed biosorbent in real uranium wastewater treatment. Grafting the microbiology with amidoxime group by using electron beam irradiation method is an innovative work. It has not been reported elsewhere.