Summary
This laboratory study investigates strontium extraction from high-level nuclear liquid waste using DtBuCH18C6 as an extractant combined with imidazolium-based ionic liquids as solvents. The research demonstrates that the [C2mim][NTf2] system achieved the highest distribution coefficient, with extraction efficiency decreasing at higher nitric acid concentrations and in the presence of inorganic salts. The thermodynamic analysis confirmed the extraction process is spontaneous and exothermic, with potential application to radioactive waste management.
UK applicability
This work is tangentially relevant to UK nuclear waste management policy and decommissioning strategies, particularly for facilities such as Sellafield. However, the findings are primarily applicable to chemical engineers and nuclear waste specialists rather than to agricultural or food systems contexts.
Key measures
Distribution coefficient (DSr), extraction efficiency (ESr), selectivity for Sr(II), thermodynamic parameters (enthalpy, entropy, Gibbs free energy via Van't Hoff equation), effect of HNO3 concentration, effect of inorganic salts (KNO3 and NaNO3)
Outcomes reported
The study evaluated the extraction efficiency and selectivity of strontium (Sr(II)) from simulated high-level liquid waste (HLLW) using DtBuCH18C6 extractant in various ionic liquid solvents. The extraction behaviour was characterised across different acidity levels, salt compositions, and ionic liquid chain lengths.
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