WSTA 15th Gulf Water Conference

WSTA 15th Gulf Water Conference
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Purification of an effluent from Sr, K and Hf, and confinement of the contaminated residue in a nuclear glass

Yasmina Mouheb, El Hayet Kamel Nour, Soumia Kamariz, Fairouz Aouchiche, Dalila Moudir, Aicha Maachou

https://doi.org/10.5004/ic202407

Purification of an effluent from Sr, K and Hf, and confinement of the contaminated residue in a nuclear glass

Yasmina Mouheb, El Hayet Kamel Nour, Soumia Kamariz, Fairouz Aouchiche, Dalila Moudir, Aicha Maachou

Algiers Nuclear Research Center, 2. Bd Frantz Fanon, B.P:399, Algiers-RP, Algeria

https://doi.org/10.5004/ic202407

ABSTRACT

The vitrification is a process used for the disposal of waste issued from both toxic and radioactive effluents. The aim of this study is the confinement in a glass of a contaminated clay issued from an extraction of: Sr, K and Hf elements. The effluent is purified by extraction with kaolin. After extraction, the elemental extraction yields are 27% of Sr, 5% of K and Hf (<0.5 ppm). The loaded clay is added to a borosilicate mixture of glass: SiO2-Al2O3-Na2O-B2O3-Cs2O-MoO3-Nd2O3. The clay content is varied from 0 to 15%. The XRD results show for 5% of clay, the glass is amorphous. For both 10 and 15% clay contents, minor ceramic phases are identified inside the glass. The glasses’ FTIR analysis allows identifying the glasses main groups’ vibrations: O-Si-O (SiO4) around 1016 cm–1 and B-O bond (BO3) around 1200 cm–1. Such an innovative extraction/vitrification process made it possible the purification of contaminated effluents by kaolin.

Keywords: Glass; Vitrification; Clay; Disposal; Radioactive waste

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