LIQUID-LIQUID EXTRATION OF ZIRCONIUM (IV) USING HIGH AMINE CTBA/n-HEXAN FROM SUNFURIC ACID MEDIA

Abstract

In this study, we investigated the effect of three fundamental parameters (absorbance wavelength, concentration of H₂SO₄ and volume ratio of Zr and XO) on the optical property of ZrXO complex.  The results showed that ZrXO complex can obatain the maximum absorbance wavelength of 535 nm at 0.35 M H₂SO₄ and . The calibration curve for determinination of Zr(IV) at 535 nm is linear in the concentrations range from 10^-4 to 5.10^-3 M. The optimal conditions for efficiency of Zr(IV), including: with 0.35 M H₂SO₄ for E = 73.26 %; with V_o/V_a = 1/1, E = 73.26 %; contact time and equilibrium time of two phases were 20 minutes, E = 73.26 %; the extraction efficiency of Zr(IV) is the highest when there is 0.25 M Na₂SO₄. Special, we introducted some characteristics of the extraction system Zr-H₂SO₄-CTAB, that were: built extraction isotherms of Zr(IV) at concentrations (0.15-1.0 M) of H₂SO₄; The Mc Cable-Thiele plot indicated with V_o/V_a = 1/1 the degrees of the theory extraction of Zr(IV) were 4 and V_o/V_a = 2/1 were 2; extracts 96.21 % of Zr(IV) from Zr(IV) 5.10^-3 M through 5 times; loading organic of 10^-4 M CTAB in n-hexan was determined to be LO = 0.4491 g/L through 5 times of phases contact.