新型金属有机聚合物对 Au(III)的高效选择性回收。
Highly efficient and selective recovery of Au(III) by a new metal-organic polymer.
机构信息
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China.
Department of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan, China.
出版信息
J Hazard Mater. 2019 Dec 15;380:120844. doi: 10.1016/j.jhazmat.2019.120844. Epub 2019 Jun 29.
A metal-organic polymer with high water stability was successfully developed to efficiently recover Au(III) from aqueous solutions. This material shows excellent performance for the adsorption of Au(III). Nearly 100% of Au(III) could be removed with fast adsorption rate at low concentration solutions, and the maximum adsorption capacity of 1317 mg/g could be achieved. Significantly, the material shows encouraging selectivity toward Au(III) in the presence of competitive ions such as Cu(II), Ni(II), Zn(II), and Cd(II) in both batch and flow-through experiments. Additionally, the material could be regenerated effectively by thiourea with desorption ratio of almost 100%, and exhibits excellent reutilization without significant loss of adsorption capacity. The adsorption mechanism could be attributed to reduce Au(III) to Au(0) by the material. The material still exhibits excellent adsorption performance toward Au in real electronic waste (e-waste) solutions, providing a promising adsorbent for recycle of Au(III) from e-waste.
成功开发出一种具有高水稳定性的金属有机聚合物，可有效地从水溶液中回收 Au(III)。该材料对 Au(III)的吸附表现出优异的性能。在低浓度溶液中，几乎 100%的 Au(III)可以通过快速吸附速率去除，最大吸附容量可达 1317mg/g。值得注意的是，该材料在存在竞争离子（如 Cu(II)、Ni(II)、Zn(II)和 Cd(II)）的情况下，在批量和流动实验中对 Au(III)表现出令人鼓舞的选择性。此外，该材料可以通过硫脲有效再生，解吸率几乎为 100%，并且在没有明显损失吸附容量的情况下表现出优异的再利用性。吸附机理可以归因于该材料将 Au(III)还原为 Au(0)。该材料在实际电子废物（电子废物）溶液中对 Au 仍表现出优异的吸附性能，为从电子废物中回收 Au(III)提供了一种有前途的吸附剂。
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