Molybdenum Separation from Sodium-Tungstate-Molybdenum Aqueous Solutions Using an Anionic Gel-Based 201 × 7 Resin

Batch adsorption experiments and column adsorption experiments were conducted using gel-based 201 × 7 resin to investigate the selective removal of MoO 4 2 - from sodium-tungstate-molybdenum aqueous. The results of the batch adsorption experiments demonstrated that gel-based 201 × 7 resin has selective removal of W and Mo. The pH value of the mixed sodium-tungstate-molybdenum aqueous (containing 9.11 g/L of Mo and 112.9 g/L of W) was adjusted to 7 by H 2 WO 4 . And W was existed as polymerised ions while Mo was existed as monodentate ions. In addition, the use of H 2 WO 4 as an acidification agent and an alternative resource for tungsten presents high potential for industrial applications. Column adsorption experiments further demonstrated that the ratio of molybdenum removal reached 91.29% for three consecutive cycles with the pH value to 7 by H 2 WO 4 , and the separation between W and Mo was more effective. Thus, this method could be highly efficient for separating W and Mo in sodium-tungstate-molybdenum aqueous and presents better industrial prospects. Graphical Abstract