在不同环境条件下对本托尼特和菲利特的吸附的比较分析:对放射性废物存储库壁垒的影响
Joanna Kyzioł-Komosińska1, Janusz Janeczek2, Agnieszka Dzieniszewska1
1Institute of Environmental Engineering, Polish Academy of Sciences, 34 M Skłodowskiej-Curie St., 41-819, Zabrze, Poland.
Environmental geochemistry and health
|March 4, 2025
概括
菲利特显示出作为放射性废物具有成本效益的缓冲材料的潜力,有效地去除 (Sr2+),尽管吸附能力低于土. 它的特性使其适合与托尼特混合.
科学领域:
- 地质化学 地质化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 放射性废物处理需要有效的缓冲材料来固定放射性核素.
- Argillaceous phyllite被研究为一种成本效益高的替代品,用于 (Sr2+) 去除的土.
研究的目的:
- 为了评估与本托尼特相比,菲利特对Sr2+的吸附能力和去除功效.
- 在各种实验条件下,确定Sr2+的基质的分布系数.
主要方法:
- 进行了批量吸附实验,以研究Sr2+吸收.
- 参数变化包括pH (3-8),离子强度 (0-0.5M NaCl或CaCl),初始Sr2+度 (0.01-200 mg L-1),和吸附剂度 (2-10 g/L).
主要成果:
- 在pH 8和零离子强度下,菲利特的最大吸附能力遵循Sips异构体 (34.86-11.32 mg g-1).
- 吸附能力随着离子强度的增加而降低,Ca2+具有比Na+更强的抑制作用.
- 菲利特的吸附率低于本托尼特,但具有有利的特性,如低初级Sr2+含量和较低的多孔性.
结论:
- 菲利特是放射性废物缓冲材料的有希望的候选物,特别是在与托尼特混合物中使用时.
- 它的地化学性质为废弃场所的长期固定提供了优势.
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