Highly efficient and selective recovery of Au(III) by a new metal-organic polymer
Highly efficient and selective recovery of Au(III) by a new metal-organic polymer
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新型金属有机聚合物高效选择性回收 Au(III)
DOI：
10.1016/j.jhazmat.2019.120844
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发表时间：
2019-12-15
影响因子：
13.6
通讯作者：
Tang, Kewen
中科院分区：
文献类型：
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作者：
Xu, Weifeng;Mo, Xiaohui;Tang, Kewen
成功地开发了具有高水稳定性的金属-有机聚合物，以有效地从水溶液中回收Au（III）。该材料对Au（III）的吸附性能优异。在低浓度溶液中，Au（III）的去除率接近100%，吸附速率快，最大吸附容量可达1317 mg/g。值得注意的是，该材料在竞争性离子如Cu（II）、Ni（II）、Zn（II）和Cd（II）的存在下，在分批和流通实验中都显示出令人鼓舞的对Au（III）的选择性。此外，该材料可以有效地用硫脲再生，解吸率接近100%，并表现出良好的重复利用没有显着的吸附容量损失。吸附机理可归因于材料将Au（III）还原为Au（0）。该材料在真实的电子废物（e-waste）溶液中仍然表现出对Au的优异吸附性能，为从电子废物中回收Au（III）提供了有前景的吸附剂。
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.