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首页> 外文期刊>Journal of industrial and engineering chemistry >Development of pilot-scale electrokinetic remediation technology to remove ~(60)Co and ~(137)Cs from soil
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Development of pilot-scale electrokinetic remediation technology to remove ~(60)Co and ~(137)Cs from soil

机译：去除土壤中〜（60）Co和〜（137）Cs的中试电动修复技术的发展

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摘要

Pilot-scale electrokinetic remediation equipment suitable to the geological characteristics of South Korean nuclear facility sites was developed for the remediation of radioactive soil. The optimal experiment conditions were chosen through pilot-scale electrokinetic remediation experiments, and the experimental results are presented. The removal efficiencies of Co~(2+) and Cs~+ from artificially contaminated soil after 15 days were 98.4 and 94.9, respectively, and the generated effluent volume was 3.4 ml/g. The removal efficiencies of ~(60)Co and ~(137)Cs by nitric acid were increased by 3.1% and 2.0% more than those by acetic acid. Moreover, when nitric acid instead of acetic acid was used, it had an advantage of a reducing electricity consumption due to its higher electrolytic conductivity. The higher the radioactivity concentration of the soil was, the more the removal efficiencies of ~(60)Co and ~(137)Cs were increased. Namely, the removal efficiencies of ~(60)Co and ~(137)Cs from the soil of high concentrations were increased by 14.4% and 3.8% more than those from the soil of low concentrations. The larger the particle size of the soil was, the more the removal efficiency of ~(137)Cs increased. Namely, the removal efficiency of ~(137)Cs from the soil of an average 1.4 mm particle size was increased by about 2.3% more than that from the soil of an average 0.7 mm particle size. Also, the removal efficiencies of ~(60)Co and ~(137)Cs by the application of an electric current of 15 mA/cm~2 were increased by 1.4% and 4.4% more than those by the application of 10 mA/cm~2. Therefore, the total removal efficiency of ~(60)Co and ~(137)Cs from the radioactive soil of about 2000 Bq/kg was 95.8% by an electrokinetic remediation by the application of an electric current of 15 mA/cm~2 for 55 days.
机译：开发了适合韩国核设施场所地质特性的中试电动修复设备，用于修复放射性土壤。通过中试电动修复实验选择了最佳实验条件，并给出了实验结果。 15天后从人工污染土壤中去除Co〜（2+）和Cs〜+的效率分别为98.4和94.9，产生的废水量为3.4 ml / g。硝酸对〜（60）Co和〜（137）Cs的去除效率分别比乙酸高3.1％和2.0％。此外，当使用硝酸代替乙酸时，由于其较高的电解电导率而具有减少电耗的优点。土壤的放射性浓度越高，〜（60）Co和〜（137）Cs的去除效率越高。即，高浓度土壤中〜（60）Co和〜（137）Cs的去除效率比低浓度土壤中的去除效率分别提高了14.4％和3.8％。土壤的粒径越大，〜（137）Cs的去除效率越高。即，从平均直径为1.4 mm的土壤中去除〜（137）Cs的效率比从平均直径为0.7 mm的土壤中去除效率高约2.3％。此外，通过施加15 mA / cm〜2的电流，〜（60）Co和〜（137）Cs的去除效率分别比通过施加10 mA / cm的去除效率分别提高1.4％和4.4％。 〜2。因此，通过施加15 mA / cm〜2的电流进行电动修复，从约2000 Bq / kg的放射性土壤中去除〜（60）Co和〜（137）Cs的总效率为95.8％。 55天。

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