| Autor: |
Baba, Alafara A., Oyetunde, Joseph O., Adekola, Folahan A., Adimula, Vincent O., Mukadam, Abdulrahman A., Adekunle, Babatunde R. |
| Předmět: |
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| Zdroj: |
Journal of Chemical Technology & Metallurgy; 2018, Vol. 53 Issue 5, p891-897, 7p |
| Abstrakt: |
Solvent extraction studies using Cyanex®272 for the extraction of zinc from spent galvanized zinc-ash after leaching in hydrochloric acid (HCl) is reported. Elemental analysis of the spent galvanized material by X-ray fluorescence (XRF) showed the percentage content of zinc to be 93.6 % with ZnO being the major compound detected by X-ray diffraction (XRD) method. The leaching solution by 1 mol/L HCl examined by Aquamate Thermo-Electron Corporation UV-Visible spectrophotometer contains 2991 mg/L zinc with other elements: Mn, Cu, Zn, Cr, Cd and Pb occuring from low to trace levels (= 1%). The results of solvent extraction of zinc by 0.25 mol/L Cyanex®272 in kerozene yielded 85.21 % extraction efficiency within 25 minutes at 27 ° 2°C. At optimal conditions, the study showed that a phase ratio of 1:1 for the organic: aqueous phase extracted 96.6 % of the total zinc into the organic phase at pH 4, of which 98 % of the loaded organic phase was quantitatively stripped by 0.1 mol/L HCl solution. By McCabe Thiele plot, three stages of counter-current extraction are required for the zinc to almost undergo complete extraction. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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