SEPARATION OF RARE EARTH ELEMENTS FROM MONAZITE SAND OF BANGKA BY SOLVENT IMPREGNATED RESIN (SIR)
Monazite sand is one of the most important natural geological materials because it contain rare earth elements (REEs) especially the light lanthanides. REEs have been used in many subject such as optics, magnetism, electronics, ceramics, catalysts, and metallurgy. In Indonesia, monazite is mostly fo...
Saved in:
| Main Author: | |
|---|---|
| Format: | Dissertations |
| Language: | Indonesia |
| Online Access: | https://digilib.itb.ac.id/gdl/view/12222 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Monazite sand is one of the most important natural geological materials because it contain rare earth elements (REEs) especially the light lanthanides. REEs have been used in many subject such as optics, magnetism, electronics, ceramics, catalysts, and metallurgy. In Indonesia, monazite is mostly found in beach sands around the coastal belt of Bangka, Belitung and Singkep islands. Monazite used in this study was obtained from Bangka island as by-product of tin mining.<p>The separation of REEs is usually carried out by solvent extraction or ion exchange. Extraction and ion exchange technique have several limitations. Extraction technique still need multistage extraction and back-extraction to get optimum separation. In addition, liquid waste disposal from extraction can cause environmental pollution. The limitations of ion exchange resins are mainly due to its lower extraction selectivity for rare earth elements and poor metal sorption capacity.<p>In 1971, Warshawsky proposed physical impregnation method known as solvent impregnated resins (SIR) method for separation of metal ions. SIR method has been used in metal or organic compounds recovery, pre-concentration of trace metal ions and also for removal of hazardous metal ions such as cadmium, mercury, and chromium(VI).<p>The present work aim to study separation of La(III), Ce(III), Pr(III), Nd(III), Sm(III), and Gd(III) from nitrate media with the use of di-(2-ethylhexyl) phosphoric acid (D2EHPA) and tributylphosphate (TBP) as extractants and Amberlite XAD16 as a polymeric support. D2EHPA is a metal-ion extractant widely used in solvent extraction for separation of various kinds of metal ions. However, there is not many work has been conducted on REEs separation by solvent impregnated resins. <br />
|
|---|