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在模拟深层放射性废物处理条件下对不钢AISI 304的微生物腐蚀进行初步研究
Elena Abramova1, Oleg Tripachev1, Natalia Shapagina1
1Frumkin Institute of Physical Chemistry and Electrochemistry Russian Academy of Sciences (IPCE RAS), 31-4, Leninsky Prospect, 119071 Moscow, Russia.
Materials (Basel, Switzerland)
|December 11, 2025
概括
放射性废物处理场所中不钢的生物腐蚀是由微生物活动加速的. 微生物生物膜和代谢物显著增加腐蚀率和坑密度,突出突出协同效应.
科学领域:
- 地质化学 地质化学
- 微生物学 微生物学
- 材料科学 材料科学 材料科学
背景情况:
- 放射性废物的地质处理对材料完整性提出了挑战.
- 受到微生物群落影响的生物腐蚀可能会损害制系统.
- 了解微生物相互作用对于长期安全性评估至关重要.
研究的目的:
- 为了模拟AISI 304不钢的生物和生物介导腐蚀.
- 为了研究放射性废物处理相关的地化学条件下的腐蚀.
- 评估微生物继承和代谢物对腐蚀率的影响.
主要方法:
- 腐蚀过程的实验室建模.
- 用葡萄糖和硫酸盐刺激来自深层地下环境的微生物群落.
- 微生物继承和生物膜形成的分析.
- 潜在动力学测量以评估腐蚀动力学.
主要成果:
- 最初的有机养菌群形成了生物膜,与非生物对照相比,增加了30倍以上的均腐蚀率.
- 随后的化学性铁和硫循环微生物群导致坑密度增加了十倍.
- 结合葡萄糖和硫酸盐的添加最大限度地提高了腐蚀率和坑密度.
- 碳酸,硫化物和微生物代谢物协同增加了五倍以上的腐蚀电流.
结论:
- 微生物活动在模拟的放射性废物处理环境中显著加速不钢腐蚀.
- 生物和非生物因素之间的协同作用会增强腐蚀.
- 这些发现对于预测地质仓库材料的长期性能至关重要.
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