Summary
This laboratory study investigated the extraction behaviour of strontium (II) from simulated high-level radioactive waste using 4',4'(5'')-di-(tert-butyl cyclohexano)-18-crown-6 as an extractant in combination with three imidazolium-based ionic liquids. The results demonstrated that extraction efficiency was highly solvent-dependent, with [C2mim][NTf2] showing superior performance, and that extraction capacity declined with increasing acid concentration. Thermodynamic analysis was employed to elucidate the underlying extraction mechanism.
UK applicability
This work addresses nuclear waste treatment chemistry and has limited direct applicability to UK agricultural, food systems, or soil health contexts. However, findings may be relevant to UK nuclear decommissioning programmes and radioactive waste management policy.
Key measures
Strontium distribution ratio (D), extraction efficiency (%), solvent composition effects, acid concentration dependence, thermodynamic parameters
Outcomes reported
The study measured strontium extraction efficiency from simulated high-level liquid radioactive waste using crown ether extractants in ionic liquid solvents. Extraction performance was characterised by distribution ratios and extraction percentages across different ionic liquid compositions and acid concentrations.
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