Continuous precision separation of gold using a metal-organic framework/polymer composite
Continuous precision separation of gold using a metal-organic framework/polymer composite
复制标题
使用金属有机骨架/聚合物复合材料连续精密分离金
DOI：
10.1088/1361-6528/ad1447
复制
发表时间：
2023
期刊：
影响因子：
3.5
通讯作者：
Sun, Daniel T.
中科院分区：
文献类型：
--
作者：
Mitchell, Emily;Hernandez, Dana;Deatherage, Ashlin;Coull, Martin Watt;Altoe, Maria Virginia;Klivanksy, Liana;Witman, Matthew;Sun, Daniel T.
具有环境和经济意义的关键金属可以在复杂的混合物中找到，如微量的尾矿、电子废物和废水。具体而言，金是一种关键金属，在各种应用中具有所需的氧化还原活性，包括现代电子学，医学和化学催化。在这里，我们报告了亚微米的Fe-BTC/PpPDA微晶结构成更大的250 μm或500 μm的颗粒，用于连续填充床实验，用于金的精密分离。结构化Fe-BTC/PpPDA是高度结晶和多孔的，BET表面积为750 m2 g− 1。此外，混合纳米复合材料保持其对金离子的选择性超过常见的无机干扰物。报道的结构化方法防止了过度的压降，并确保了随时间的稳定性和在填充床柱中的操作。此外，我们证明了结构化Fe-BTC/PpPDA可以在动态连续流操作下浓缩至少42重量%的金。这些发现突出了结构化Fe-BTC/PpPDA在工业实际应用中的潜力，特别是在从复杂混合物中选择性捕获金方面。
Critical metals of environmental and economic relevance can be found within complex mixtures, such as mine tailings, electronic waste and wastewater, at trace amounts. Specifically, gold is a critical metal that carries desired redox active properties in various applications, including modern electronics, medicine and chemical catalysis. Here we report the structuring of sub-micron Fe-BTC/PpPDA crystallites into larger 250 μm or 500 μm granules for continuous packed bed experiments for the precision separation of gold. The Structured Fe-BTC/PpPDA is highly crystalline and porous with a BET surface area of 750 m 2 g− 1. Further, the hybrid nanocomposite material maintains its selectivity for gold ions over common inorganic interferents. The structuring approach reported prevents excessive pressure drop and ensures stability over time and operation in a packed bed column. Further, we demonstrate that the Structured Fe-BTC/PpPDA can concentrate at least 42 wt% of gold under a dynamic continuous flow operation. These findings highlight the potential of Structured Fe-BTC/PpPDA for practical applications in industry, particularly in the selective capture of gold from complex mixtures.