模拟高放废物深地质处置条件下Se在铁基材料上的氧化还原行为

许强伟; 方升; 刘晨; 龙浩骑; 陈曦; 王波; 徐毓炜; 周舵

doi:10.7538/hhx.2022.YX.2021093

模拟高放废物深地质处置条件下Se在铁基材料上的氧化还原行为

中国原子能科学研究院放射化学研究所,北京102413

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- 刊出日期: 2022-12-19

Redox Behavior of Se on Iron-Based Materials in Simulated Geological Disposal Environment of HLW

China Institute of Atomic Energy, P. O. Box 275(93), Beijing 102413, China

摘要

摘要: 以铁基材料（纯铁和304L不锈钢）和Na₂SeO₄/Na₂SeO₃溶液为研究对象，依托低氧手套箱，在常温、低氧条件下，采用静态批式法开展了Se（Ⅵ/Ⅳ）和铁基材料氧化还原作用研究，利用离子色谱法分析研究浸泡铁基材料的Na₂SeO₄溶液和Na₂SeO₃溶液浓度变化，运用扫描电子显微镜（SEM）、X射线能谱分析（EDS）和拉曼光谱（Raman）等技术，对反应前后铁基材料样品的表观形貌、元素分布、物相组成进行较为系统的物理-化学表征。结果表明，SeO^2-₄/SeO^2-₃在纯铁体系中的反应速率明显快于其在304L不锈钢体系中的反应速率；铁基材料还原SeO^2-₃的速率快于SeO^2-₄的。
- 低氧 /
- 铁基材料 /
- Se /
- 氧化还原
Abstract: In this paper, reduction-oxidation between Se and iron-based materials(pure iron and 304L stainless steel) was carried out in glove box under ambient temperature and low-oxygen. Using ion chromatography to analyse the concentration changes of sodium selenate solution and sodium selenite solution in which iron-based materials were immersed. The iron-based material samples before and after the reaction were analysed by scanning electron microscopy(SEM), energy dispersive spectrometer(EDS) and Raman spectrometry. The results show that the oxidation-reduction reaction rate of SeO^2-₄/SeO^2-₃ and pure iron is significantly faster than that of SeO^2-₄/SeO^2-₃and 304L stainless steel; the reaction rate of ironbased materials and SeO^2-₃ is higher than that of iron-based materials and SeO^2-₄.
- anaerobic environment /
- iron-based materials /
- Se /
- redox

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参考文献(14)

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