Existing form of Mo(VI) in acidic sulfate solution

The existing form of molybdenum in acidic sulfate solution was studied by means of ion exchange, infrared (IR) spectra and X-ray photoelectron spectroscopy (XPS). The results indicate that the anionic molybdenum species are predominant in acidic sulfate solution, and Mo(VI) can combine with sulfate radical to form heteropoly acid anions [Mo2O5(SO4)2]2− and [MoO2(HSO4)4]2−. With the decrease in solution pH from 1.92 to 0.06, the existing form of Mo(VI) changes from Mo7O21(OH) 3 3− to [Mo2O5(SO4)2]2− and then becomes [MoO2(HSO4)4]2−, which results in the decrease in the resin adsorption capacity for molybdenum.