An experimental investigation was conducted to recover and recycle a precious metal (molybdenum) while treating industrial wastewater using a novel membrane-integrated hybrid technology. Hollow-fiber crossflow modules containing ultrafiltration and nanofiltration membranes in the recirculation mode successfully separated 96.5% of the molybdenum from industrial wastewater. The volume of feed wastewater (250 L) was reduced by ∼94%, and the molybdenum concentration was increased from 1.32 to 10.2 g/L using a VNF-1 membrane for its smooth recovery (98.7%) as ammonium molybdate by chemical precipitation under response-surface-optimized conditions of critical parameters of NH₄⁺/Mo ratio (1.32), pH (1.7), temperature (62 °C), and time (15.7 h). Further, ammonium molybdate was converted into MoO₃ of high purity (99.4%) using thermal decomposition at 500 °C for 30 min. This is the first proof-of-concept demonstrating the use of a membrane system to recover molybdenum from industrial wastewater to promote a circular economy for recycling and regenerating valuable resources.

进行了一项实验研究，以在使用新型膜集成混合技术处理工业废水的同时回收和循环利用贵金属（钼）。在再循环模式下，包含超滤和纳滤膜的中空纤维错流模块成功地从工业废水中分离出 96.5% 的钼。进料废水 (250 L) 的体积减少了约 94%，使用 VNF-1 膜将钼浓度从 1.32 增加到 10.2 g/L，通过化学沉淀以钼酸铵的形式顺利回收 (98.7%) NH ₄ ⁺ /Mo 比率 (1.32)、pH (1.7)、温度 (62 °C) 和时间 (15.7 h) 等关键参数的响应面优化条件。此外，钼酸铵转化为MoO₃的高纯度 (99.4%) 在 500 °C 下热分解 30 分钟。这是第一个证明使用膜系统从工业废水中回收钼以促进循环经济以回收和再生宝贵资源的概念验证。