Effective removal of cesium from wastewater via adsorptive filtration with potassium copper hexacyanoferrate-immobilized and polyethyleneimine-grafted graphene oxide.
Effective removal of cesium from wastewater via adsorptive filtration with potassium copper hexacyanoferrate-immobilized and polyethyleneimine-grafted graphene oxide.
复制标题
DOI：
10.1016/j.chemosphere.2020.126262
复制
发表时间：
2020-02
期刊：
影响因子：
8.8
通讯作者：
Yonghwan Kim;H. Eom;Y. Kim;D. Harbottle;Jae W. Lee
中科院分区：
文献类型：
--
作者：
Yonghwan Kim;H. Eom;Y. Kim;D. Harbottle;Jae W. Lee
作为一个有吸引力的替代放射性铯去除，我们介绍了一种吸附过滤方法，使用的复合膜组成的钾铜铁氰化物（KCuHCF）和石墨烯为基础的支持。聚乙烯亚胺接枝还原氧化石墨烯（PEI-rGO），用作固定基质，不仅有效地在复合材料内分布KCuHCF与丰富的氨基功能的援助，但也在实现高水通量通过增加层间间距的层状膜结构。由于KCuHCF的快速和选择性的铯吸附特性，发现所制造的膜在高通量（超过500 L m-2 h-1）下有效地实现铯离子的完全去除，这在利用分子筛效应的常规膜中是困难的。这一方法在消除需要迅速和彻底去污的放射性核素方面具有很大的潜力。
As an attractive alternative to radioactive cesium removal, we introduced an adsorptive filtration method using a composite membrane consisting of potassium copper hexacyanoferrate (KCuHCF) and graphene-based support. Polyethyleneimine-grafted reduced graphene oxide (PEI-rGO), used as an immobilizing matrix, was effective not only in distributing KCuHCF inside the composite with the aid of abundant amino-functionality, but also in achieving high water flux by increasing the interlayer spacing of the laminar membrane structure. Due to the rapid and selective cesium adsorption properties of KCuHCF, the fabricated membrane was found to be effective in achieving complete removal of cesium ions under a high flux (over 500 L m−2h−1), which is difficult in a conventional membrane utilizing the molecular sieving effect. This approach offers strong potential in the field of elimination of radionuclides that require rapid and complete decontamination.