Removal of Cesium from Radioactive Waste Liquids Using Geomaterials
Removal of Cesium from Radioactive Waste Liquids Using Geomaterials
复制标题
利用地质材料去除放射性废液中的铯
DOI：
10.3390/app11188407
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发表时间：
2021
期刊：
影响因子：
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通讯作者：
Haixin Zhang;M. Zhu;Xiaoyu Du;Sihan Feng;Naoto Miyamoto;N. Kano
中科院分区：
文献类型：
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作者：
Haixin Zhang;M. Zhu;Xiaoyu Du;Sihan Feng;Naoto Miyamoto;N. Kano
在这项研究中，我们研究了利用土工材料去除水溶液中的Cs。选择吸附作为一种从放射性废液中去除Cs的有效方法。利用碱性激发剂制备了以粉煤灰和矿渣为原料的岩土材料作为吸附剂。用X射线衍射仪(X射线衍射仪)、扫描电子显微镜和能谱仪(SEM-EDS)以及BET比表面积、孔体积和孔径分析对材料进行了表征。考察了pH值、吸附时间、吸附剂用量等参数对Cs吸附的影响。在本工作中，通过计算分配系数(PC)和吸附容量来评价该吸附剂的真实性能。在本实验条件下，粉煤灰基土工材料对Cs的最大吸附容量为89.32 mg·g−1，吸附容量为31.0 2 mg·g−1·mm−1。由此可见，该方法可作为一种潜在的吸附剂用于处理废水中的Cs。此外，还从化学角度探讨了Cs在岩土材料中的固定化。总之，以飞灰为基础的岩土材料可能是处理和处置核污染废物的一种有前途的选择。
In this study, we investigated the removal of Cs from aqueous solutions using geomaterials. Adsorption was chosen as an effective method to develop for the removal of Cs from radioactive waste liquids. Geomaterials, including fly ash and slag as raw materials, were prepared as adsorbents using an alkali activator. The materials were characterized by X-ray diffraction (XRD); scanning electron microscopy with energy dispersive spectrometer (SEM-EDS); and BET surface area, pore volume, and pore size analysis. The effects of various parameters, such as pH, contact time, and adsorbent dosage on the adsorption of the Cs were studied. The partition coefficient (PC) as well as the adsorption capacity were evaluated to assess the true performance of the adsorbent in this work. The fly ash-based geomaterials showed a maximum Cs adsorption capacity of 89.32 mg·g−1 and a high PC of 31.02 mg·g−1·mM−1 for the Cs under our experimental conditions. From this work, this method can be regarded being practical for use as a potential adsorbent for treating Cs in wastewater. Furthermore, the immobilization of Cs in geomaterials was explored from a chemical perspective. In conclusion, fly ash-based geomaterials may be a promising option for the treatment and disposal of nuclear-contaminated waste.