Study on decontamination for cesium polluted soils by a chlorination-volatilization method

氯挥发法净化铯污染土壤的研究

• 批准号: 24686105
• 负责人: HIRABAYASHI Daisuke
• 金额: $ 8.82万
• 依托单位: Nagoya University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (A)
• 财政年份: 2012
• 资助国家: 日本
• 起止时间: 2012-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-24686105/
• 关键词: 汚染土壌; セシウム; 塩化揮発法; 乾式除染; 実土壌; 模擬土壌; 粘土鉱物

The experimental studies on removal of cesium by a chlorination-volatilization method were carried out for the decontamination of the polluted soils generated in the nuclear accident. Before the chlorination experiments, we tried to investigate the properties of cesium distribution towards particle sizes classifications of the sample soils collected in Fukushima prefecture. The soil particles were highly precisely classified into nano-meter sizes, and evaluated the radioactivies of cesium 137 and 134 using high purity germanium detector. On the base of the results, the applicability of the chlorination-volatilization method was evaluated employing bentonite sample composed of particles smaller than 5 um which was contribute most to cesium adsorption onto soils. As the result, it was found that the higher temperature over 900 C was effective that it may enhance the volatilization amount of cesium larger than 100 times larger than without its chlorination.

对通过氯化 - 胆碱化方法去除剖宫产的实验研究是为核事故中产生的污染土壤进行去污的。在进行氯化实验之前，我们试图研究纤维县收集的样品土壤粒度分类的剖腹分布的特性。高度精确地将土壤颗粒分类为纳米米尺寸，并使用高纯净的锗探测器评估了137和134的放射性。在结果的基础上，评估了氯化 - 挥发性方法的适用性，该方法采用了由小于5 um的颗粒组成的膨润土样品，这对剖宫产的吸附最大。结果，发现在900 C以上的温度较高是有效的，它可能会增强比没有其氯化的大于100倍大于100倍的纤维化量。

项目成果

汚染土壌の粒径区分と放射性セシウム濃度の評価

污染土壤粒径分级及放射性铯浓度评价

• 发表时间: 2012
• 作者: T. Himeno;D. Haba;K.Ishikawa;Y. Umemura;C. Inoue;S. Uzawa;T. Watanabe and S.Nonaka;巻俊宏;I. Koike;平林大介,澤田佳代,杉山貴彦,榎田洋一
• 通讯作者: 平林大介,澤田佳代,杉山貴彦,榎田洋一