磷酸铝铁钠玻璃组成对其抗浸出性能的影响

IF 1 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Radiochemistry Pub Date : 2025-08-07 DOI:10.1134/S1066362225030099

S. A. Fimina, K. Yu. Belova, S. E. Vinokurov

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引用次数: 0

摘要

研究了磷酸铝铁钠玻璃中结构形成组分的含量对含铁高放废物深层处理过程中玻璃化产物的物相组成、结构和耐高温浸出性能的影响。结果表明，40.0Na2O-12.5Al2O3-12.5Fe2O3-35.0P2O5、35.0Na2O-12.5Al2O3-12.5Fe2O3-40.0P2O5和35.0Na2O-10.0Al2O3-10.0Fe2O3-45.0P2O5为单一非晶玻璃相，具有较高的水热稳定性。在90°C和95°C半动态（第28天）和动态（第10天）条件下，上述样品的钠和磷的浸出率分别约为10−5 g (cm2 d)，铝的浸出率分别为（2-10）× 10−6和（0.6-2）× 10−5 g/(cm2 d)，铁的浸出率分别为（7 - 12）× 10−7和（0.4-3）× 10−6 g/(cm2 d)。

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Influence of Sodium Aluminum Iron Phosphate Glass Composition on Its Resistance to Leaching

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Influence of Sodium Aluminum Iron Phosphate Glass Composition on Its Resistance to Leaching

The influence of the content of structure-forming components of sodium aluminum iron phosphate glass on its phase composition, structure, and resistance to leaching at elevated temperatures as necessary characteristics of vitrified iron-containing high-level waste during its deep disposal was studied. It was found that the samples studied (mol %), 40.0Na₂O–12.5Al₂O₃–12.5Fe₂O₃–35.0P₂O₅, 35.0Na₂O–12.5Al₂O₃–12.5Fe₂O₃–40.0P₂O₅, and 35.0Na₂O–10.0Al₂O₃–10.0Fe₂O₃–45.0P₂O₅, consist of a single amorphous glass phase and have high hydrothermal stability. The leach rate of sodium and phosphorus from the above samples under semidynamic (on the 28th day) and dynamic (on the 10th day) conditions at 90 and 95°C, respectively, was about 10⁻⁵ g (cm² day), that of aluminum, within the range (2–10) × 10⁻⁶ and (0.6–2) × 10⁻⁵ g/(cm² day), respectively, and that of iron, within the range (7–12) × 10⁻⁷ and (0.4–3) × 10⁻⁶ g/(cm² day), respectively.

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来源期刊

Radiochemistry CHEMISTRY, INORGANIC & NUCLEAR-

CiteScore

1.30

自引率

33.30%

发文量

期刊介绍： Radiochemistry is a journal that covers the theoretical and applied aspects of radiochemistry, including basic nuclear physical properties of radionuclides; chemistry of radioactive elements and their compounds; the occurrence and behavior of natural and artificial radionuclides in the environment; nuclear fuel cycle; radiochemical analysis methods and devices; production and isolation of radionuclides, synthesis of labeled compounds, new applications of radioactive tracers; radiochemical aspects of nuclear medicine; radiation chemistry and after-effects of nuclear transformations.