SYNERGISTIC EXTRACTION OF VANADIUM BY DI-2-ETHYL HEXYL PHOSPHORIC ACID AND TRIBUTYL PHOSPHATE FROM BLACK SHALE SEDIMENTS, QUSEIR, RED SEA, EGYPT | ||||
| Nuclear Sciences Scientific Journal | ||||
| Article 12, Volume 3, Issue 1, 2014, Page 181-190 PDF (178.32 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/nssj.2014.30973 | ||||
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| Author | ||||
| RANDA M. EL-RAKAIBY | ||||
| Nuclear Materials Authority,Cairo, Egypt | ||||
| Abstract | ||||
| Extraction of vanadium from the sulphate leach liquor of the black shale from Nakheil mine NW Quseir, red sea, Egypt was studied by using a synergistic mixture of di-(2-ethylhexyl) phosphoric acid (DEHPA) and tributyl phosphate (TBP) in kerosene. A technological sample of this ore material assaying about 2400 μg/ml V, 2300 μg/ml Zn, 570 μg/ml Mo, 1.6 % Fe and 272 μg/mL Ni was collected for the present work. Metallic iron powder was found greatly an advantage to minimize the iron co-extraction, while adjusting the pH of aqueous solution to 0.8 minimized the co-extraction of Zn and Ni. The relevant extraction factors affecting maximum recovery of vanadium have been studied; namely solvent ratio (DEHPA/TBP), concentration of solvent, O/A phase ratio, contact time, settling time, temperature, the amount of reducing agent and the time of reduction. Selective stripping of vanadium has been performed using 100g/L Na2CO3 while Mo was left in the organic phase. The relevant stripping factors affecting maximum stripping of vanadium have been studied namely; O/A phase ratio, contact time, settling time, and the temperature. | ||||
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