Immobilization of KTS-3 on an electrospun fiber membrane for efficient removal of Cs+ and Sr2+
Immobilization of KTS-3 on an electrospun fiber membrane for efficient removal of Cs+ and Sr2+
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DOI：
10.1016/j.jece.2021.105991
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发表时间：
2021-07-07
影响因子：
7.7
通讯作者：
Lee, Jae W.
中科院分区：
文献类型：
--
作者：
Eom, Ho Hyeon;Kim, Yonghwan;Lee, Jae W.
处理放射性含水废物的需要已经增加，对这种废物的净化是高度优先事项。本研究展示了一种制备新型复合膜的方法，该复合膜使用金属硫化物离子交换剂KTS-3有效地去除Cs+和Sr 2+离子。采用静电纺丝法制备聚丙烯腈（PAN）吸附剂载体，用于吸附KTS-3。通过球磨粉碎，将KTS-3均匀分散并固定在具有高透水性和大比表面积的PAN载体上。优化KTS-3与聚合物载体的比例以使复合膜的吸附性能最大化。因此，我们获得了高的最大吸附容量为133.6和32.4毫克g（-1）的Cs+和Sr 2+分别。在过滤试验中，当通量达到2000 L·m（-2）·h（-1）时，仍能保持较高的吸附容量。新制造的材料提供了一个有吸引力的策略，利用吸附剂有效地连续选择性去除污染废水中的放射性核素。
The need to treat radioactive aqueous waste has increased, and decontamination of such waste is of high priority. This study demonstrates a method of fabricating a new composite membrane to effectively remove Cs+ and Sr2+ ions using KTS-3, a metal sulfide ion exchanger. The study utilized an electrospinning method to fabricate polyacrylonitrile (PAN) nanofiber support to immobilize the adsorbent KTS-3. Through pulverization using ball milling, KTS-3 was dispersed evenly and fixed to the PAN support which offered high water-permeability and large surface area. The ratio of KTS-3 to the polymer support was optimized to maximize the adsorption performance of the composite membrane. Consequently, we obtained high maximum adsorption capacities of 133.6 and 32.4 mg g(-1) for Cs+ and Sr2+, respectively. Moreover, the high adsorption capacity was kept in the filtration test when the flux reaches 2000 L m(-2) h(-1). The newly fabricated material provides an attractive strategy to utilize adsorbents effectively for the continuous selective removal of radionuclides from contaminated wastewater.