Recovery of Rare earth elements using ethanolic extractant of aerial part of Helianthus annuus plant from their sulfate leach liquor
- Chemistry Dep., Faculty of Science, Zagazig University, Egypt.
- Nuclear Materials Authority, P.O. Box 530 El-Maadi, Cairo, Egypt.
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The possibility of using Helianthus annuus extractant (sun flower) as a solvent for Rare earth elements ( REEs) extraction from its sulfate liquor for their recovery has been studied. Several experiments were conducted to determine the relevant factors affecting both the extraction and stripping of the REEs from a synthetic solution. Under the optimum conditions, the achieved REEs capacity has attained about 12 mg/g for the ethanolic extractant via 10 vol. of ethanolic extractant, O/A ratio of 1:1 for a shaking time 10 min. at the pH of 0.1. The optimum stripping conditions for REEs content from the loaded ethanolic extractant using 1M NaCl /1M HCl were aqueous to organic phase ratio (A/O) 1:3, stripping time 15 minutes and at room temperature (25oC). From the prepared sulfate leach liquor of Abu Zeneima raw material (South Eastern Sinai, Egypt), REEs has then been recovered using the working ethanolic extractant under the previously studied optimum conditions, with an efficiency of 82% The obtained strip liquor was then subjected to precipitation using 20 % oxalic acid to precipitate REEs as lanthanides oxalate. The obtained precipitate has been confirmed using EDAX analysis.
[Amani M. El-Mesallamy , Enas M. El-Sheikh, Ahmed Orabi, Mohamed A. El-Maksoud (2015); Recovery of Rare earth elements using ethanolic extractant of aerial part of Helianthus annuus plant from their sulfate leach liquor Int. J. of Adv. Res. 3 (Nov). 169-184] (ISSN 2320-5407). www.journalijar.com
