Analytical Parameter Optimization of Separation Process of Various Radionuclides.

摘要

Separation and preconcentrations of Eu, Hf and Se were studied, using an adsorption technique based on TiO2. Characterization of titanium dioxide was done on TG/DSC and the surface area, pore size and average pore diameter measured. The influence of contact time, electrolyte composition, pH of the aqueous solution, effect of anions and cations was also investigated. The adsorption data show that Eu, Se and Hf can be preconcentrated by using 0.01 molar perchloric acid, nitric acid, and pH.7 buffer solution. Iodide, acetate, and citrate increase the adsorption of these metals, while S2O3 decrease the adsorption of Se. The adsorption of other metal ions was also investigated. Based on these data, Co(II), Mn(II) and Ag(I) can be separated from the above metals. It can be concluded that TiO2 can be used for the separation and preconcentration of Eu, Hf and Se from dilute solution.