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走向可持续的放射性废物管理:污水泥灰灰的地聚合是一种可行的解决方案

Alexandre Las Casas¹, Leandro Goulart de Araujo¹, Roberto Vicente¹

¹Nuclear and Energy Research Institute, IPEN-CNEN/SP, Av. Prof. Lineu Prestes, São Paulo 2242, Brazil.

|March 10, 2025

概括

污水污泥灰 (SSA) 可以地质聚合以固定放射性废物. 这种可持续的方法为波特兰水泥提供了替代方案,显示出有效的废物制与低释放率.

科学领域:

材料科学材料科学材料科学
环境工程环境工程
废物管理废物管理

背景情况:

放射性废物固定对环境安全至关重要.
像波特兰水泥这样的传统方法也有局限性.
污水污泥灰 (SSA) 是地质聚合的潜在替代前体.

研究的目的:

调查SSA的地质聚合潜力,用于放射性废物固定.
优化基于甲的地质聚合物配方,以获得增强的性能.
评估含有-137.7的SAS衍生地质聚合物的有效性.

主要方法:

来自不同处理厂的SSA的特征.
100% SSA 地质聚合物的合成和压力强度测试.
使用全因数设计优化一种基于甲的地质聚合物.
使用ICP-OES,XRF,XRD,SEM和EDS进行SAS增强地质聚合物的分析.
模拟放射性废物 (-137) 的固定和泄试验.

主要成果:

优化的地质聚合物配方 (120g MK,125g AS,360g沙子,55g水,14.5g石灰) 实现了21.3 ± 0.6 MPa的压力强度.
用SSA增强的地质聚合物证明了对-137的有效固定.
对137Cs (2.55×10−5到3.23×10−5cmd−1) 观察到较低的浸出率.

结论:

污水污泥灰是地质聚合物合成的可行前体.
来自SSA的地质聚合物有效地固定放射性废物,包括-137.
地质聚合物为放射性废物管理提供了一个可持续且有前途的波特兰水泥替代品.

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