Status : Verified
| Personal Name | Carrasco, Bryan Patrick M. |
|---|---|
| Resource Title | Viability of Deep Eutectic Solvent (DES) Extraction of Scandium from Nitric Acid Solutions |
| Date Issued | 2 February 2024 |
| Abstract | Scandium is a metal with emerging applications in aerospace industry and sustainable energy storage. It is commonly extracted as a by-product of nickel laterite ores using high pressure mineral acid leaching and solvent extraction. Solvent extraction is an enrichment process wherein an organic solvent is made in contact with aqueous solution containing the desirable metal. In this study, a biodegradable and environmentally benign DES composed of decanoic acid and lidocaine mixture is synthesized and used in the solvent extraction of scandium. The viability of DES as an extractant for scandium was investigated by varying the following parameters: initial scandium concentration in the aqueous phase, extraction time, pH and DecA:Lid molar ratio. The mechanism of DES extraction was also established. It was found that percent extraction of Sc increased at high Sc concentration. It was also observed that at high Sc concentration, white precipitate formed at all pH and extraction time combinations. Slight increase in percent extraction of scandium was observed at pH 1.5 when extraction time was increased from 8 to 12 minutes. For pH 2.5 and 4.5, increasing extraction duration does not affect extraction of Sc. Percent extraction was stable at around 82-83%. Increasing the pH from 1.5 to 4.5 also increased the recovery of Sc. Increasing decanoic acid in the DES promotes higher Sc distribution ratio, and consequently, higher Sc extraction. The conventional slope analysis showed that the extraction mechanism is proton exchange, and it can be expressed as: Sc3+(aq) + 3DecA-(org) + LidH+(org) Sc(DecA)3●Lid(org) + H+(aq) |
| Degree Course | MS Metallurgical Engineering |
| Language | English |
| Keyword | scandium; deep eutectic solvent; lidocaine; decanoic acid; solvent extraction |
| Material Type | Thesis/Dissertation |
Preliminary Pages
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Category : P - Author wishes to publish the work personally.
Access Permission : Limited Access