SEPARATION OF CERIUM (IV) FROM RARE EARTH ELEMENTS BY TABULAR SUPPORTED LIQUID MEMBRANE TECHNIQUE
Cerium(IV) as a product of oxidation rare earth elements (REE(III)) solution derived from monazite minerals of Bangka can be separated using Tabular Supported Liquid Membrane (TSLM). In this study Ce(III) was oxidized to Ce(IV) by ammonium peroxydisulfate. Tributhyl Phospate (TBP) and di-2-ethylhe...
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| Format: | Final Project |
| Language: | Indonesia |
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| Online Access: | https://digilib.itb.ac.id/gdl/view/34792 |
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| Institution: | Institut Teknologi Bandung |
| Language: | Indonesia |
| Summary: | Cerium(IV) as a product of oxidation rare earth elements (REE(III)) solution derived from monazite minerals of Bangka can be separated using Tabular Supported Liquid Membrane (TSLM). In this study Ce(III) was oxidized to Ce(IV) by ammonium peroxydisulfate. Tributhyl Phospate (TBP) and di-2-ethylhexyl phosphoric acid (D2EHPA) in kerosene as a solvent carrier were used in this method either as a single substance or a mixture. Several factors have been studied to optimize separation, namely variation type of acid in receiving phase, variation concentration of HCl in receiving phase, and variation composition of TBP and or D2EHPA in the membrane phase. The values of each parameter which gave the best transport were combined to obtain the best separation condition. The best conditions obtained were HCl as acid in receiving phase, the concentration of HCl in receiving phase 1.0 M, the composition of D2EHPA: TBP in membrane phase 0.75M:0.25M. In this condition, transport percentage of REE(III) was 88,12%. It has been found out that the increase of chloric acid concentration in receiving phase gradually give raise transport of rare earth elements. Determination of concentration REE in each fraction was analyzed by spechtrophotometer at wavelength 528 nm after previously complexed with alizarin sulphonate in pH= 4,5. Based on the XRF measurements, the purity of Ce(IV) as result of separation process was 65,76%. |
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