Kim Ilgook, Kim Gye-Nam, Kim Seung-Soo, Choi Jong-Won
a Korea Atomic Energy Research Institute , Daejeon , Republic of Korea.
Environ Technol. 2018 Jan;39(1):68-73. doi: 10.1080/09593330.2017.1296026. Epub 2017 Mar 3.
In this study, a practical decontamination process was developed to remove uranium from gravel using a soil washing method. The effects of critical parameters including particle size, HSO concentration, temperature, and reaction time on uranium removal were evaluated. The optimal condition for two-stage washing of gravel was found to be particle size of 1-2 mm, 1.0 M HSO, temperature of 60°C, and reaction time of 3 h, which satisfied the required uranium concentration for self-disposal. Furthermore, most of the extracted uranium was removed from the waste solution by precipitation, implying that the treated solution can be reused as washing solution. These results clearly demonstrated that our proposed process can be indeed a practical technique to decontaminate uranium-polluted gravel.
在本研究中，开发了一种实用的去污工艺，采用土壤冲洗法从砾石中去除铀。评估了包括粒径、硫酸浓度、温度和反应时间等关键参数对铀去除的影响。发现砾石两段冲洗的最佳条件为粒径1-2毫米、硫酸浓度1.0 M、温度60°C和反应时间3小时，这满足了自行处置所需的铀浓度。此外，大部分提取的铀通过沉淀从废溶液中去除，这意味着处理后的溶液可作为冲洗液重复使用。这些结果清楚地表明，我们提出的工艺确实可以成为一种净化铀污染砾石的实用技术。
