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<p>This study systematically has investigated the adsorption–desorption behavior and cyclic service performance of SO<sub>4</sub><sup>2−</sup>-type D301 resin for vanadium(V). By constructing the component dominance area diagrams for the V(V)-H<sub>2</sub>O, Ga(III)-H<sub>2</sub>O, and Al(III)-H<sub>2</sub>O systems, a critical theoretical basis has been provided for the subsequent assessment of system interference. Dynamic adsorption experiments showed that the resin has high selectivity for vanadium (with a adsorption capacity of 60.1&#xa0;mg/g), and that the adsorption curve presents a typical S-shaped characteristic, revealing the synergistic mechanism of ion exchange and physical adsorption. It can effectively separate vanadium from coexisting metals such as gallium and aluminum. Static desorption experiments screened out NaOH as the desorbent with the highest efficiency and fastest rate. Ultraviolet spectroscopy was used to explore the influence of different desorbents on the valence state of vanadium. An amount of 2&#xa0;mol/L NaOH can desorb vanadium most efficiently, with a desorption rate of 93.25% within 10&#xa0;min. FTIR analysis indicated that only partial functional groups of the resin underwent slight degradation. After multiple adsorption–desorption cycles, the adsorption curve of SO<sub>4</sub><sup>2−</sup>-type D301 resin exhibits an S-shaped characteristic with a high breakthrough capacity, enabling effective separation of vanadium from gallium and aluminum, thus showing potential for industrial application.</p>

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Selective Adsorption–Desorption Behavior and Mechanism of Vanadium(V) from the Bayer System by D301 Resin

  • 期刊论文

  • 发表日期：

    2026年4月13日

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  • Yiling Zhang,
  • Weiguang Zhang,
  • Yibing Li,
  • Xuejiao Cao,
  • XueXian Jiang,
  • Zijie Nie

摘要

This study systematically has investigated the adsorption–desorption behavior and cyclic service performance of SO42−-type D301 resin for vanadium(V). By constructing the component dominance area diagrams for the V(V)-H2O, Ga(III)-H2O, and Al(III)-H2O systems, a critical theoretical basis has been provided for the subsequent assessment of system interference. Dynamic adsorption experiments showed that the resin has high selectivity for vanadium (with a adsorption capacity of 60.1 mg/g), and that the adsorption curve presents a typical S-shaped characteristic, revealing the synergistic mechanism of ion exchange and physical adsorption. It can effectively separate vanadium from coexisting metals such as gallium and aluminum. Static desorption experiments screened out NaOH as the desorbent with the highest efficiency and fastest rate. Ultraviolet spectroscopy was used to explore the influence of different desorbents on the valence state of vanadium. An amount of 2 mol/L NaOH can desorb vanadium most efficiently, with a desorption rate of 93.25% within 10 min. FTIR analysis indicated that only partial functional groups of the resin underwent slight degradation. After multiple adsorption–desorption cycles, the adsorption curve of SO42−-type D301 resin exhibits an S-shaped characteristic with a high breakthrough capacity, enabling effective separation of vanadium from gallium and aluminum, thus showing potential for industrial application.