Abstract
The effect of temperature on the extraction of plutonium(VI) into dodecane by di(2-eth-ylhexyl)sulphoxide (DEHSO) has been investigated as a function of temperature in the range 25–50°C using a wide range of concentrations of both nitric acid as well as DEHSO. The results show that the distribution ratios of plutonium(VI) considerably decrease with increasing temperature. From the variation of the distribution ratio ( D pu) with temperature, the thermodynamic parameters such as the free energy (Δ G), enthalpy (Δ H), and entropy (Δ S) changes associated with the formation of PuO 2(NO 3) 2·2DEHSO have been evaluated following a least squares method. Extraction of plutonium(VI) from nitric acid by DEHSO is invariably exothermic in nature and is mainly enthalpy controlled, the entropy change counteracting in all cases. Values of Δ H are not much affected by increase in nitric acid concentration. Negative values of Δ S are indicative of a smaller entropy gain due to loss of hydration water molecules compared to entropy loss due to complex formation.
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.
