Selective adsorption of Au(III) with ultra-fast kinetics by a new metal-organic polymer

Selective adsorption of Au(III) with ultra-fast kinetics by a new metal-organic polymer
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新型金属有机聚合物以超快动力学选择性吸附 Au(III)

DOI:
10.1016/j.molliq.2020.114125
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发表时间:
2020-12
影响因子:
6
通讯作者:
雷娅俊
雷娅俊
中科院分区:
化学2区
文献类型:
--
作者:
周淑贤;莫晓慧;朱文婷;许卫凤;唐课文;雷娅俊

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随着电子产品产量的不断增加,从水溶液中回收金越来越受到关注。在这里,设计和制备了一种新型金属有机聚合物,用于有效和选择性地从液体溶液中吸附少量金。该材料可以以超快的动力学从低金浓度(9 mg/L)中完全吸附金离子,并且对含有 8 mg/L Au(III) 和 1200 mg/L Cu(II)、Zn(II)、Co(II)、Cd(II) 和 Ni(II) 的复杂金属混合物中的 Au(III) 表现出出色的吸附选择性。该材料还具有 775.0 mg/g 的卓越吸附能力。令人鼓舞的是,该材料具有优异的循环性能,这是其在实际环境中应用的重要性能。研究发现吸附过程中涉及的部分氧化还原、络合和静电相互作用是有效吸附的原因。这种材料为从溶液中去除微量金提供了一种有前景的吸附剂。
It has received increasing concern for the recovery of gold from aqueous solution with the ever-increasing production of electronics. Here, a novel metal-organic polymer was designed and prepared for effective and selective adsorption of low amounts of gold from liquid solutions. This material can adsorb the gold ions completely from low gold concentration (9 mg/L) with ultra-fast kinetics, and exhibits splendid adsorption selectivity toward Au(III) from complex metal mixtures containing 8 mg/L Au(III) and 1200 mg/L Cu(II), Zn(II), Co(II), Cd(II) and Ni(II). The material also has an exceptional adsorption capacity of 775.0 mg/g. Encouragingly, the material has excellent cyclability, which is an important property for its application in real environment. It is found that partial redox, complexation and electrostatic interaction involved in the adsorption process are responsible for the efficient adsorption. This material provides a promising adsorbent for removing trace gold from solutions.
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