Gold recovery from thiosulfate leaching solution Au(S₂O₃)₂^3– is regarded as a tough task because of the low efficiency and complex procedure in current technology, which hindered the industrial application of this eco-friendly technique. In this work, a MoS₂@activated alumina bead composite (MoS₂@AA) was constructed through a simple hydrothermal anchoring method and served as a catalyst to recover gold from Au(S₂O₃)₂^3– solution for the first time. The microstructure and chemical component of MoS₂@AA were systematically analyzed. In addition, batch experiments were carried out to explore the recovery behavior of Au(S₂O₃)₂^3– (concentration: 10 to 200 ppm). Ascribing to the extraordinary optical property of MoS₂@AA, Au(S₂O₃)₂^3– could be directly reduced to Au⁰ by photogenerated electrons and then form a two-phase interface of gold/MoS₂@AA. As a result, the recovery of Au(S₂O₃)₂^3– can reach up to 98% on MoS₂@AA, which was much higher than traditional methods. More importantly, the reduced Au⁰ could be desorbed from MoS₂@AA through a supersonic method, achieving one-step Au⁰ recovery from Au(S₂O₃)₂^3–. This novel strategy used in this research has great significance to the development of Au(S₂O₃)₂^3– recovery in the future.

中文翻译：

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构建 MoS2@活化氧化铝珠作为催化剂从 Au(S2O3)23 中快速回收金– 解决方案

_{从硫代硫酸盐浸出液Au(S 2} O ₃ ) ₂ ^3-中回收金是一项艰巨的任务，因为目前的技术效率低且程序复杂，阻碍了这种环保技术的工业应用。在这项工作中，通过简单的水热锚定方法构建了MoS ₂ @活性氧化铝珠复合材料（MoS ₂ @AA），并首次作为催化剂从Au(S ₂ O ₃ ) ₂ ^3–溶液中回收金。 . _{MoS 2}的显微结构和化学成分@AA 进行了系统分析。此外，还进行了批量实验，以探索 Au(S ₂ O ₃ ) ₂ ^3-（浓度：10 至 200 ppm）的回收行为。由于MoS ₂ @AA 的非凡光学特性，Au(S ₂ O ₃ ) ₂ ^3–可以通过光生电子直接还原为Au ⁰，然后形成金/MoS ₂ @AA 的两相界面。因此，在 MoS _{2上 Au(S 2} O ₃ ) ₂ ^3–的回收率可以达到 98%@AA，这比传统方法要高得多。更重要的是，还原后的Au ⁰可以通过超声方法从MoS _{2 @AA 中解吸出来，实现了从Au(S 2} O ₃ ) ₂ ^3-中一步回收Au ⁰。本研究采用的这一新策略对未来Au(S ₂ O ₃ ) ₂ ^3-回收的发展具有重要意义。