Zia Mah Rukh, Raza Muhammad Asim, Park Sang Hyun, Irfan Naseem, Ahmed Rizwan, Park Jung Eun, Jeon Jongho, Mushtaq Sajid
Department of Nuclear Engineering, Pakistan Institute of Engineering and Applied Sciences, P. O. Nilore, Islamabad 45650, Pakistan.
Advanced Radiation Technology Institute, Korea Atomic Energy Research Institute, Jeongeup 56212, Korea.
Nanomaterials (Basel). 2021 Feb 26;11(3):588. doi: 10.3390/nano11030588.
Efficient and cost-effective removal of radioactive iodine (radioiodine) from radioactive contaminated water has become a crucial task, following nuclear power plant disasters. Several materials for removing radioiodine have been reported in the literature. However, most of these materials exhibit some limitations, such as high production cost, slow adsorption kinetics, and poor adsorption capacity. Herein, we present silver/iron oxide nanocomposites (Ag/FeO) for the efficient and specific removal of iodine anions from contaminated water. The Ag/FeO were synthesized using a modified method and characterized via scanning electron microscopy, transmission electron microscopy, and X-ray diffraction analyses. This adsorbent showed a high adsorption capacity for iodine anions (847 mg/g of the adsorbent) in pure water. Next, Ag/FeO was applied to the removal of radioiodine, and high removal efficiencies were observed in water. In addition, its desalination capacity was retained in the presence of competitive ions and varied pH. After the adsorption process, Ag/FeO was easily removed from the water by applying an external magnetic field. Moreover, the same operation can be repeated several times without a significant decrease in the performance of Ag/FeO. Therefore, it is expected that the findings presented in this study will offer a new method for desalinating radioiodine in various aqueous media.
在核电站灾难之后，高效且经济地从放射性污染水中去除放射性碘（放射性碘）已成为一项关键任务。文献中报道了几种用于去除放射性碘的材料。然而，这些材料大多存在一些局限性，如生产成本高、吸附动力学缓慢以及吸附容量低。在此，我们展示了银/氧化铁纳米复合材料（Ag/FeO），用于从污染水中高效且特异性地去除碘阴离子。采用改进方法合成了Ag/FeO，并通过扫描电子显微镜、透射电子显微镜和X射线衍射分析对其进行了表征。这种吸附剂在纯水中对碘阴离子表现出高吸附容量（847毫克/克吸附剂）。接下来，将Ag/FeO应用于去除放射性碘，在水中观察到了高去除效率。此外，在存在竞争离子和不同pH值的情况下，其脱盐能力得以保留。吸附过程结束后，通过施加外部磁场可轻松将Ag/FeO从水中去除。而且，相同操作可重复多次，而Ag/FeO的性能不会显著下降。因此，预计本研究的结果将为在各种水性介质中脱除放射性碘提供一种新方法。
