Extraction Chromatography Study of Mo and W for Model Experiment on Aqueous Chemistry of Superheavy Element,Sg

The adsorption behavior of group 6 elements Mo and W on the α-benzoinoxime/PTFE material was investigated in order to develop an experimental approach to aqueous chemical characterization of seaborgium(Sg,element 106).The experimental results show that the maximal adsorption percentage of Mo and W can reach 92% and 87%,respectively.The adsorption kinetics of Mo is faster than W in 1 mol/L HNO3 solution.In HNO3/HF mixed acid solutions,there are significant differences in the behavior of both elements under the higher concentration of HF.This is because W has a stronger tendency for forming anionic species with fluoride ion than Mo.Moreover,the sorption process of Mo and W is exothermic and spontaneous,and their adsorption distribution coefficient is affected by temperature and decreases with the increasing of temperature.