A STUDY OF URANYL SULPHATE COMPLEXES ON QUATERNARY AMMONIUM RESIN WITH INFRARED SPECTROMETRY

In this paper uranyl sulphate species adsorbed on quaternary ammonium resin are studied with infrared spectrometry. It has been found that when UO2 (SO4) 22- or UO2 (SO4) 34- is adsorbed the asymmetric stretch of UO22+, v3, is observed at 918 cm-1 or 910 cm-1 respectively. When the resin is brought io equilibrium with the solution similar to that used in uranium hydro-metallurgy, the value of n in the complex UO2(SO4)n2-2n is 2.5-2.7, v3 of UO22+ and the peak assigned to quaternary ammonium group of the resin are merged at 900 cm-1 After the loaded resin is pressed into disks with KBr, exchange reaction takes place, thus uranyl sulphate complexes turn to UO2(SO4)22- and SO42. According to the amount of U and SO42- on loaded resin found from chemical equivalent method and the final free SO42- determined by IR, the value of n is calculated.