Abstract
The effect of temperature on the synergetic extraction of uranyl ion with thenoyl trifluoroacetone (HTTA) and neutral donors has been investigated by distribution measurements in the system UO 2/HTTA/ S [ S = trioctyl phosphine oxide (TOPO), tributyl phosphate (TBP), dibenzyl sulphoxide (DBSO) and diphenyl sulphoxide (DPSO)] at various temperatures. Results indicate that the distribution coefficient falls by 20–30 per cent for a 10°C rise in temperature of the system whereas, it remains virtually the same for extraction by HTTA alone. Values of ΔF, ΔH and ΔS in the temperature range of 30°–70°C for the various systems seem to indicate that the greater stability of UO 2(TTA) 2TOPO is derived from the enthalpy and entropy factors. The effect of salt concentration in the aqueous phase on the extraction of the species UO 2(TTA) 2 S has also been studied by distribution measurements in the above system in the presence of varying concentrations of the perchlorates of lithium, sodium and ammonium. As expected, the distribution coefficient increases with increase in salt concentration in the aqueous phase. The increased extraction in the presence of lithium perchlorate can be correlated with its larger hydrated ionic radius.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
