基于汞纳米陷阱的高效去除水溶液中汞(II)。
Mercury nano-trap for effective and efficient removal of mercury(II) from aqueous solution.
机构信息
Department of Chemistry, University of South Florida, 4202 E. Fowler Avenue, Tampa, Florida 33620, USA.
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China.
出版信息
Nat Commun. 2014 Nov 20;5:5537. doi: 10.1038/ncomms6537.
Highly effective and highly efficient decontamination of mercury from aqueous media remains a serious task for public health and ecosystem protection. Here we report that this task can be addressed by creating a mercury 'nano-trap' as illustrated by functionalizing a high surface area and robust porous organic polymer with a high density of strong mercury chelating groups. The resultant porous organic polymer-based mercury 'nano-trap' exhibits a record-high saturation mercury uptake capacity of over 1,000 mg g(-1), and can effectively reduce the mercury(II) concentration from 10 p.p.m. to the extremely low level of smaller than 0.4 p.p.b. well below the acceptable limits in drinking water standards (2 p.p.b.), and can also efficiently remove >99.9% mercury(II) within a few minutes. Our work therefore presents a new benchmark for mercury adsorbent materials and provides a new perspective for removing mercury(II) and also other heavy metal ions from contaminated water for environmental remediation.
从水溶液中高效、高容量地去除汞仍是公共健康和生态系统保护的一项重大任务。在此，我们报告了一种方法，通过功能化高比表面积和高稳定性的多孔有机聚合物来实现这一目标，在聚合物上引入高密度的强汞螯合基团，从而形成汞的“纳米捕集器”。由此得到的基于多孔有机聚合物的汞“纳米捕集器”具有超过 1000 mg g-1 的超高饱和汞吸附容量，可将 10 ppm 的汞（II）浓度有效降低到远低于饮用水标准（2 ppm）可接受限值的极低水平（小于 0.4 ppb），并且可在几分钟内高效去除超过 99.9%的汞（II）。因此，我们的工作为汞吸附材料提供了一个新的基准，并为去除汞（II）和其他重金属离子提供了新的思路，从而实现受污染水的环境修复。
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