Abstract
The variation of the distribution coefficient ( K d ) of U(VI) in the nitric acid-TBP system, as a function of temperature (in the range of 10–60°C) has been studied employing two diluents for TBP ( n-dodecane and shellsol-T), four concentrations of TBP (2.5, 5.0, 15 and 30%) and at five concentrations of aqueous nitric acid (0.1, 0.25, 0.5, 1.0 and 4.0). All the data obtained showed that the extraction of U(VI) from nitric acid into TBP is exothermic in nature. The enthalpy values, under different conditions, have been calculated. Using extrapolation techniques thermodynamic value for the enthalpy of extraction has been obtained to be −5.0±0.5 kcal/mole. The thermodynamic free energy and entropy changes were calculated to be −2.6 kcal/mole and −7.9 cal/deg. mole.
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.
