Synthesis Of Anion Exchanger And Study Of Its Adsorption And Elution Behavior Toward Rhenium And Technetium

99Tc is a long half-life element, which is rampant in nuclear spent fuel. Therefore, study on adsorption and separation of 99 Tc has intrigued great interest among researchers. Rhenium, simultaneously located in VIIB, is similar to Technetium in term of chemical properties, so it is reasonable to speculate that experimental datum about Rhenium can be applied to Technetium. Besides, Rhenium, itself, is a rare metal but has wide application. In this thesis, two anion exchangers have been successfully synthesized and both their adsorption and elution behavior toward Rhenium and Technetium have been studied.To begin, a weak-base anion exchanger PS-g-4VP was prepared through ?-irradiation-induced grafting of 4-vinyl pyridine onto polystyrene microsphere. After quaternization, a strong-base anion exchanger PS-g-4VP-IE was synthesized. In order to optimize those synthetic processes, monomer concentration and radiation dose and quanternization time were investigated.After these two exchangers have successfully been prepared, their adsorption behavior toward Rhenium was then studied. In batch-wise experiments, it took 30 min for PS-g-4VP-IE to reach adsorption equilibrium; Langmuir isotherm model showed that the maximum adsorption capacity of PS-g-4VP-IE toward Rhenium is 252mg/g, which are all superior to PS-g-4VP. In batch-wise elution experiments, reductive reagents such as DEHA have been adopted as eluents to test their elution efficiency. While PS-g-4VP-IE exhibited better adsorption and elution properties in column experiments than PS-g-4VP, both these two anion exchangers have potential in industrial separation of Rhenium.In batch-wise adsorption experiments toward 99 Tc, the results matched well with those toward Rhenium. More importantly, being able to absorb 99 Tc effectively, both these anion exchangers are competent in separation of Technetium from nuclear spent fuel.