Abstract
The extraction behavior of uranyl species from HNO3 aqueous solutions using CH2 Cl2 containing pyrrolidone derivatives as extractants has been studied to find an alternative to tributyl phosphate as an extractant. In this study, we used N-cyclohexyl-2-pyrrolidone (NCP), N-octyl-2-pyrrolidone (NOP), and N-dodecyl-2-pyrrolidone (NDP) as the extractants. As a result, it was found that NCP, NOP, and NDP (abbreviated as NRP) extract U(VI) as UO2(NO3)2(NRP)2, that a part of NCP in CH2 Cl2 phase is moved to the aqueous phase, and that the extractability (corresponding distribution ratio) of U(VI) increases with increasing [HNO3]int from 7% (0.08) ([HNO3]int = 0.1 M, [NRP]int = 1.0 M) to more than 90% (11) ([HNO3]int = 3.0 M, [NRP_int = 1.0 M). From these results, it is expected that NOP and NDP extract U(VI) effectively from HNO3 solution of more than 3M and that the extracted U(VI) species are stripped by using HNO3 aqueous solution of low concentration.
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.
