多孔性硅基磷钼酸铵吸附剂对铯的固化性能

张晓霞; 吴昊; 韦悦周

doi:10.7538/hhx.2018.YX.2018058

多孔性硅基磷钼酸铵吸附剂对铯的固化性能

1.
国防科工局核技术支持中心,北京100080
2.
Tokyo Institute of Technology, Japan Tokyo 152-8550
3.
广西大学资源环境与材料学院,广西南宁530005
4.
上海交通大学核科学与工程学院,上海200240

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- 刊出日期: 2020-02-19

Solidification Characteristics of Porous AMP/SiO₂ Towards Cs(Ⅰ)

1.
Nuclear Technology Support Center of China Atomic Energy Authority, Beijing 100080, China
2.
Tokyo Institute of Technology, Tokyo 152-8550, Japan
3.
School of Resources Environment and Materials, Guangxi University, Nanning 530005, China
4.
School of Nuclear Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

摘要

摘要: 以多孔二氧化硅为载体，结合旋转蒸发减压法与孔内结晶法合成了硅基磷钼酸铵吸附剂(AMP/SiO₂)，采用冷压成型/高温烧结工艺固化技术对分离模拟高放废液中Cs的二次固体废物AMP-Cs/SiO₂进行了固化处理，并考察了固化体的性能。实验结果表明：不添加固定基材且烧结温度大于1000 ℃时，AMP/SiO₂对Cs的固定率为40%。添加水铝英石(allophane)作为固化基材，烧结混合物（AMP-Cs/SiO₂-allophane）形成稳定的结晶相Cs₄Al₄Si₂₀O₄₈，对铯的固定率不小于96%，抗压强度大于7 MPa。烧结固化体在25 ℃去离子水中浸出28 d后，Cs(Ⅰ)的浸出率约为3×10^-5 g/(cm²•d)。
- AMP/SiO₂ /
- Cs(Ⅰ) /
- 固化 /
- Cs₄Al₄Si₂₀O₄₈
Abstract: AMP loaded silica adsorbents (AMP/SiO₂) were synthesized by the rotary evaporation reducing pressure method and the crystallization method. A pressing/sintering method was used for the stable solidification of secondary solid wastes AMP-Cs/SiO₂ which was produced from the separation of Cs from simulated high level liquid waste. The properties of the solidified products were investigated. Without allophane, the immobilization percentage of Cs (Ⅰ) decreases to 40% when the temperature is more than 1 000 ℃. When adding allophane, the stable Cs₄Al₄Si₂₀O₄₈crystalline phase is recrystallized, the Cs immobilization percentage is more than 96% and the compressive strength is higher than 7 MPa. The leachability of Cs (Ⅰ) from the deionized water (DW) is about 3×10^-5 g/(cm²•d) at 25 ℃.
- AMP/SiO₂ /
- Cs(Ⅰ) /
- solidification /
- Cs₄Al₄Si₂₀O₄₈

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参考文献(14)

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多孔性硅基磷钼酸铵吸附剂对铯的固化性能

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Solidification Characteristics of Porous AMP/SiO2 Towards Cs(Ⅰ)

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Solidification Characteristics of Porous AMP/SiO₂ Towards Cs(Ⅰ)