Abstract
An aqueous two-phase system of tetrabutylammonim. bromide (TBAB) and (NH 4) 2SO 4mixture is proposed for the selective extraction of trace Cd 2+ from large amounts of Co 2+, Cu 2+, Fe 3+ and Zn 2+. Transparent two-phase system is prepared by mixing 3 ml of 1.0 mol/l TBAB, and 2 ml of sample solution and 1.1g of (NH 4) 2SO 4, the two-phase system thus obtained is of 1.5 ml upper phase and 4.1 ml bottom phase. TBAB was distributed between the upper and bottom phases respectively, but the concentration in upper phase is much higher than that of the bottom phase. The results showed that Cd 2+ is selectively extracted into the upper phase in the pH ranges 1.0–9.0, while Co 2+ Cu 2+ and Fe 3+ ions were little extracted (<1%) at pH 3.0. Zinc ion was extracted to upper phase by about 24%, but it did not interfere the extraction of Cd 2+. The interaction between CdBr 4 2− and TBA + plays an important role in the extraction process.
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.
