Batch adsorption experiments and column adsorption experiments were conducted using gel-based 201 × 7 resin to investigate the selective removal of \({{\text{MoO}}}_{4}^{2-}\) 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 H₂WO₄. And W was existed as polymerised ions while Mo was existed as monodentate ions. In addition, the use of H₂WO₄ 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 H₂WO₄, 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

中文翻译：

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使用阴离子凝胶基 201 × 7 树脂从钠-钨酸钠-钼水溶液中分离钼

采用凝胶基201×7树脂进行批量吸附实验和柱吸附实验，研究从钨酸钠-中选择性去除\({{\text{MoO}}}_{4}^{2-}\)钼水溶液。间歇吸附实验结果表明，凝胶基201×7树脂对W和Mo具有选择性去除作用。钨酸钠-钼混合水溶液（含Mo 9.11 g/L，含Mo 112.9 g/L）的pH值W)通过H ₂ WO ₄调节至7 。W以聚合离子形式存在，Mo以单齿离子形式存在。此外，使用H ₂ WO ₄作为酸化剂和钨的替代资源具有很高的工业应用潜力。柱吸附实验进一步表明，在pH值为7的情况下，H ₂ WO ₄连续三个循环对钼的去除率达到91.29% ，W和Mo的分离更加有效。因此，该方法可高效分离钨酸钠-钼水溶液中的W和Mo，具有较好的工业前景。

图形概要