Scientists from Russian scientific and educational institutions have developed a technology to transform an absorbent material that absorbs radioactive elements from water into a ceramic material, thereby enhancing its ability to retain these elements.
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A source in the Russian Ministry of Education and Science says: "Scientists from the Far Eastern Federal University, in collaboration with colleagues from the Kola Scientific Center of the Russian Academy of Sciences and St. Petersburg University, have developed a technology for reprocessing materials used in purifying water from radioactive substances. They propose to transform an absorbent material saturated with radionuclides into a durable ceramic capable of reliably retaining the hazardous elements and preventing their leakage into the environment."
The source indicates that after water is purified of hazardous substances, the absorbent material itself becomes radioactive. When converted into a ceramic material, the resulting solid crystalline structure tightly retains the radionuclides. The study was based on a synthetic isotope of the natural mineral avanaokete, sodium titanosilicate, which was synthesized by specialists from the Kola Scientific Center.
According to him, scientists at Far Eastern Federal University transformed radioactive nuclide-saturated absorbent material into ceramics using spark plasma sintering technology. The powder is placed in a special mold and simultaneously heated and compressed. Under the influence of high pressure and temperature, the material's molecules fuse together to form a dense and strong mass, capable of efficiently retaining radioactive materials.
Scientists at St. Petersburg Technical University studied how the original absorbent material changes under high temperatures and forms new compounds, while remaining capable of retaining hazardous elements.
The source says: "This work represents the first successful example of incorporating evanokit using spark plasma sintering. The results show the possibility of converting the spent absorbent material, rather than producing another form of waste that requires further processing, into a cohesive and stable ceramic material for long-term radionuclide stabilization."
According to him, this innovation can be used in the fields of environmental science and medical radiochemistry.
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