在活性材料中的化物不移
Raudhatul Islam Chaerun1, Manami Ishimura2, Pramesti Prihutami3
1Division of Sustainable Resources Engineering, Graduate School of Engineering, Hokkaido University, Sapporo, 060-8628, Hokkaido, Japan; Nuclear Fuel Cycle Engineering Laboratories, Japan Atomic Energy Agency, Muramatsu 4-33, Tokai-mura, Naka-gun, Ibaraki, 319-1194, Japan; Fukushima Research and Engineering Institute, Japan Atomic Energy Agency, Muramatsu 4-33, Tokai-mura, Naka-gun, Ibaraki, 319-1194, Japan.
Chemosphere
|December 4, 2024
概括
酸银有效地使-129在活性材料中的固定,这对于处理核电站的放射性废物至关重要. 这种方法可以抑制-129从消耗的吸附剂材料中浸出.
科学领域:
- 核化学 核化学 核化学
- 材料科学 材料科学 材料科学
- 环境科学 环境科学
背景情况:
- 福岛第一核电站的放射性冷却水含有-129等放射性核酸.
- -129对最终处置构成重大挑战,因为其半衰期长,吸附能力差.
- 活性材料 (AAM) 有效地固定了阴离子放射性核素,但与阳离子放射性核素作斗争.
研究的目的:
- 为了研究基于的AAM (K-AAM) 中的阳离子-129 (I-) 的固定.
- 为了评估分层双氧化物 (LDH),氧化 (MgO) 和酸银 (AgNO3) 作为K-AAM中的添加剂I-固定化的有效性.
- 确定增强抑制AAM中的I-泄漏的方法.
主要方法:
- 将LDH,MGO和AgNO3作为添加剂纳入K-AAM.
- 评估修改后的K-AAM的I-保留能力.
- 从AAM矩阵中分析I-的泄漏率和机制.
主要成果:
- LDH和MgO添加剂在保留I-在K-AAM方面无效.
- LDH的吸附部位被酸离子所占据,MgO形成了缺乏I-保留的酸水合物 (M-S-H).
- 添加AgNO3显著减少了由于银化物 (AgI) 的形成而导致的I-化.
结论:
- 酸银是一种有前途的添加剂,可以在K-AAM中固定129.
- 在制造过程中优化AgNO3含量可以增强I-固定.
- 在K-AAM矩阵内产生足够的AgI是抑制放射性废物材料I-泄漏的关键.
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