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<p>The feasibility of employing an ion-exchange resin for the recovery of antimony(V) from an industrial waste effluent has been investigated. The source of the effluent is a treatment process designed to reduce the volume of a spent uranium-antimony catalyst prior to its immobilisation and disposal in South Korea; known as the SENSEI Process. Commercial macroporous-type cation (Strong acid cation, Mitsubishi DIAION PK216) and anion (Strong base anion Type I, Mitsubishi DIAION PA316; Strong base anion Type II, Mitsubishi DIAION PA418) exchange resins, as well as macroporous-type chelation resins (Aminophosphonic acid, Lanxess LEWATIT TP260; Sulfonic-phosphonic acid, Purolite MTS957) have undergone batchwise screening. LEWATIT TP260 showed the best antimony removal from sulfuric acid solutions across the entire [H<sup>+</sup>] range tested (0.01&#xa0;mM – 2&#xa0;M) and showed no loss of removal performance as a function of increasing sulfate concentration at high [H<sup>+</sup>]. The Hill isotherm model produced the best fit for antimony binding to LEWATIT TP260 (Adj. R<sup>2</sup> = 0.9969), corresponding to an equilibrium adsorption capacity of 160.55&#xa0;mg g<sup>−1</sup>. Second order kinetics (Adj. R<sup>2</sup> = 0.9808) best described the kinetic uptake of antimony onto the TP260 resin indicating a chemisorption mechanism. The presence of phosphate [PO<sub>4</sub><sup>3−</sup>] had a negligible impact on antimony removal by TP260, however, the presence of molybdate [MoO<sub>4</sub><sup>2−</sup>] and silica, both found in the SENSEI effluent stemming from the original catalyst, significantly reduced the performance of TP260.</p>

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SOHIO Process Legacy Waste Treatment: Antimony(V) Removal from Sulfate Media Using Organic Polymeric Ion Exchange Resins

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月25日

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  • Richard I. Foster,
  • James T. M. Amphlett,
  • Kwang-Wook Kim,
  • Clint A. Sharrad,
  • Keunyoung Lee

摘要

The feasibility of employing an ion-exchange resin for the recovery of antimony(V) from an industrial waste effluent has been investigated. The source of the effluent is a treatment process designed to reduce the volume of a spent uranium-antimony catalyst prior to its immobilisation and disposal in South Korea; known as the SENSEI Process. Commercial macroporous-type cation (Strong acid cation, Mitsubishi DIAION PK216) and anion (Strong base anion Type I, Mitsubishi DIAION PA316; Strong base anion Type II, Mitsubishi DIAION PA418) exchange resins, as well as macroporous-type chelation resins (Aminophosphonic acid, Lanxess LEWATIT TP260; Sulfonic-phosphonic acid, Purolite MTS957) have undergone batchwise screening. LEWATIT TP260 showed the best antimony removal from sulfuric acid solutions across the entire [H+] range tested (0.01 mM – 2 M) and showed no loss of removal performance as a function of increasing sulfate concentration at high [H+]. The Hill isotherm model produced the best fit for antimony binding to LEWATIT TP260 (Adj. R2 = 0.9969), corresponding to an equilibrium adsorption capacity of 160.55 mg g−1. Second order kinetics (Adj. R2 = 0.9808) best described the kinetic uptake of antimony onto the TP260 resin indicating a chemisorption mechanism. The presence of phosphate [PO43−] had a negligible impact on antimony removal by TP260, however, the presence of molybdate [MoO42−] and silica, both found in the SENSEI effluent stemming from the original catalyst, significantly reduced the performance of TP260.