음이온교환수지를 이용한 우라늄의 흡·탈착 특성
Characteristics of Uranium Adsorption/Desorption using Anion Exchange Resin
In this study, adsorption/desorption characteristics of uranium ion was investigated using an anion exchangeresin. After anionization of uranyl(UO2 2+) ion, batch tests were conducted using A500/2788 as an anion exchange resin. Adsorption tests were conducted for various concentrations of acid, temperatures, concentrations of uranium ions and adroption times whereas desorption tests were conducted for various concentrations of H2SO4 and reaction times. According to test results, the highest adsorption of uranium ion was obtainde in 0.01 M H2SO4 solution while the adsorption decrease in the strong acidic solution. Also, the adsorption rate was found to adsorption capacity. Furthermore, the adsorption results were found to respond well to Langmuir isotherm equation and follow the pseudo second-order kinetic model. In case of desorption tests, the high desorption was obtained in concentrated H2SO4 solutions. Desorption of more than 70% was obtained at the beginning of 60 minutes while the desorption rate decreased gradually and reached to the equilibrium after 6 hours.
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