Abstract
We have used tri-n-octylphosphine oxide (TOPO) as a solvent extractant of uranium(VI) and thorium(IV) from nitric and hydrochloric acid solutions (1-3). In contrast, the extraction of uranium(VI) and thorium(IV) from nitric and hydrochloric acid solutions has been investigated by tri-n-butylphosphate (TBP) (4, 5). However, since TBP reveals a poor efficiency for the extraction of metals from sulphuric acid solutions, this paper extends work to the extraction of uranium(VI) from sulphuric acid solutions by TOPO. Experimental Reagent TOPO (Hokko Chemical Industry Co. Ltd., Tokyo) was used without further purification and dissolved in kerosene, or benzene. The kerosene was purified by washing with concentrated sulphuric acid (4). The aqueous solutions of uranyl sulphate were prepared by dissolving uranyl sulphate hydrate (UO2SO4·3H2O, Yokozawa Chemical Co. Ltd.) in sulphuric acid solutions of the required concentrations. All chemicals were of analytical reagent grade. Extraction and analytical procedures Equal volumes (20 ml) of the TOPO solution
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.
