Abstract
Sodium salt waste (SSW) liquid containing Cs-137 is characterized by complex chemical compositions. Based on the content variation of Cs+, NaNO2 and NaOH in a simulated SSW liquid, the influence of SSW compositions on the structures of geopolymer waste-forms (GWF) was investigated. Especially, the immobilization of SSW liquid easily led to residual sodium salts and deteriorate the properties of GWF. Therefore, a hydrothermally-sintered hybrid process was exploited to remove residual salts to improve GWF’s mechanical properties and the ability to immobilize Cs+. The process also reduced the volatilization of Cs+ during sintering due to the presence of pollucite in GWF.
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Chen, S., Wang, TX. Influence of compositions of sodium nitrite waste liquids containing Cs+ on geopolymer waste-form’s mineral-phases under hydrothermally-sintered process. J Radioanal Nucl Chem (2024). https://doi.org/10.1007/s10967-024-09511-9
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DOI: https://doi.org/10.1007/s10967-024-09511-9