Abstract
Ethylhexyl-2-ethylhexyl phosphonic acid (PC-88A) and Tributylphosphate (TBP) extractants have been attached to polypropylene (PP) in granular, film and non-woven fabric forms, by a simultaneous c-ray irradia- tion method. The extraction of plutonium from the acidic radioactive liquid waste by modified polymers was studied by varying the c-ray dose. The uptake of plutonium was also studied by polyethylene (PE) in film form. This modified polymer also showed extraction capability for plutonium from nitric acid medium. The uptake of pluto- nium depends upon the c-ray dose as well as the nature and source of the polymer. Liquid-solid extraction studies showed that the equivalent amount of uptake of plutonium on TBP-polyethylene film requires twice the c-ray dose as compare to TBP-polypropylene film. It was observed that at given c-ray dose polypropylene fabric is not sturdy, compare to the granules and films, and material leach out in aqueous phase. The presence of other solvents like di-methyl formamide (DMF) and cyclohexane during c-ray irradiation were able to enhance the extraction capabilities. The optimum conditions established during this study was successfully applied for the separation of plutonium, ura- nium and thorium from the fission products in acidic waste solution.
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