Direct conditioning of liquid organic radioactive waste into a geopolymer matrix

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F24%3AN0000117" target="_blank" >RIV/26722445:_____/24:N0000117 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.djs.si/upload/nene/2023/proceedings/Contribution_515_final.pdf" target="_blank" >https://www.djs.si/upload/nene/2023/proceedings/Contribution_515_final.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Direct conditioning of liquid organic radioactive waste into a geopolymer matrix

Popis výsledku v původním jazyce

The management and disposal of liquid organic radioactive waste pose significant challenges due to their hazardous nature and long-term environmental impacts. Conventional methods, such as incineration and solvent extraction, often result in secondary waste streams or generate harmful emissions. To address these issues, we investigate a novel approach for directly conditioning the liquid organic radioactive waste into a geopolymer matrix. A series of experimental tests were conducted to evaluate the feasibility and effectiveness of the direct conditioning method. Engine oil was used as a simulated organic radioactive waste and mixed with blast-furnace slag, alkali activators, and other additives to form a homogeneous geopolymer mixture. The mixture was then cured under controlled conditions, allowing the formation of a hardened geopolymer matrix incorporating the liquid organic radioactive waste. Various techniques, including UV/Vis spectroscopy, X-Ray Diffraction (XRD), microscopy and compressive strength tests, were employed to characterise the physical, chemical, and mechanical properties of the resulting geopolymer waste forms. Compressive strength tests demonstrated that the geopolymer waste forms exhibited satisfactory mechanical performance, suggesting their potential suitability for long-term storage and disposal of liquid organic radioactive waste. Furthermore, leaching experiments were conducted to assess the leachability of oil and selected elements from the conditioned waste form. The results revealed very low oil leaching, indicating high immobilisation efficiency. Overall, this study demonstrates the successful direct conditioning of liquid organic radioactive waste into a geopolymer matrix using blast furnace slag alkali-activated binder. The results highlight the potential of this approach as a sustainable and effective solution for the immobilisation and safe disposal of liquid organic radioactive waste streams. Further research and optimisation are necessary to expand the application of this technique to other liquid organic waste types and evaluate its long-term performance under various environmental conditions.

Název v anglickém jazyce

Direct conditioning of liquid organic radioactive waste into a geopolymer matrix

Popis výsledku anglicky

The management and disposal of liquid organic radioactive waste pose significant challenges due to their hazardous nature and long-term environmental impacts. Conventional methods, such as incineration and solvent extraction, often result in secondary waste streams or generate harmful emissions. To address these issues, we investigate a novel approach for directly conditioning the liquid organic radioactive waste into a geopolymer matrix. A series of experimental tests were conducted to evaluate the feasibility and effectiveness of the direct conditioning method. Engine oil was used as a simulated organic radioactive waste and mixed with blast-furnace slag, alkali activators, and other additives to form a homogeneous geopolymer mixture. The mixture was then cured under controlled conditions, allowing the formation of a hardened geopolymer matrix incorporating the liquid organic radioactive waste. Various techniques, including UV/Vis spectroscopy, X-Ray Diffraction (XRD), microscopy and compressive strength tests, were employed to characterise the physical, chemical, and mechanical properties of the resulting geopolymer waste forms. Compressive strength tests demonstrated that the geopolymer waste forms exhibited satisfactory mechanical performance, suggesting their potential suitability for long-term storage and disposal of liquid organic radioactive waste. Furthermore, leaching experiments were conducted to assess the leachability of oil and selected elements from the conditioned waste form. The results revealed very low oil leaching, indicating high immobilisation efficiency. Overall, this study demonstrates the successful direct conditioning of liquid organic radioactive waste into a geopolymer matrix using blast furnace slag alkali-activated binder. The results highlight the potential of this approach as a sustainable and effective solution for the immobilisation and safe disposal of liquid organic radioactive waste streams. Further research and optimisation are necessary to expand the application of this technique to other liquid organic waste types and evaluate its long-term performance under various environmental conditions.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

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Návaznosti

R - Projekt Ramcoveho programu EK

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

NENE 2023 : 32nd International Conference Nuclear Energy for New Europe : proceedings : September 11-14, Portorož, Slovenia

ISBN

978-961-6207-56-0

ISSN

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e-ISSN

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Počet stran výsledku

12

Strana od-do

1-12

Název nakladatele

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Místo vydání

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Místo konání akce

Portorož, Slovenia

Datum konání akce

11. 9. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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