Pengekstrakan pelarut torium daripada unsur nadir bumi dalam pekatan torium monazit

Translated title of the contribution: Solvent extraction of thorium from rare earth elements in monazite thorium concentrate

Wadeeah M. Al-Areqi, Che Nor Aniza Che Zainul Bahri, Amran Ab. Majid, Sukiman Sarmani

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Solvent extraction is a powerful separation technique in the preparation of nuclear grade thorium. In this study, monazite thorium concentrates produced from Malaysian monazite were used. Thorium was extracted from an aqueous nitric acid medium with TBP (30%) in kerosene and Aliquat-336 (10%) in kerosene, respectively. Constant experimental conditions were used for the extraction in terms of the molarity of nitric acid, concentration of extractants in kerosene, organic/aqueous volumetric ratio, mixing time, and contact time between phases. The stripping process was carried out with distilled water. The determination of thorium and rare earth elements (REEs) in the monazite thorium concentrates and aqueous solutions were performed by using inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of thorium in the thorium concentrate samples were in the range of 11.58-83.56%. Three stages of extraction and three stages of stripping were carried out for the extraction of thorium from the REEs in the nitrate solution. The results of the study showed that the thorium extraction efficiency was in the range of 60.96-99.75% using TBP (30%) in kerosene and Aliquat-336 (10%) in kerosene. Thorium was stripped from the loaded TBP (30%) in kerosene and Aliquat-336 (10%) in kerosene at an average stripping percentage of 89.04% and 75.75%, respectively. The stripped aqueous solutions were analysed, and it was shown that the thorium content was in the range of 29.49-91.28%. This study indicated that both extractants can be successfully used to recover thorium from REEs, but in order to increase the purification of thorium, the extraction and stripping process cycle should be increased.

Original languageMalay
Pages (from-to)1250-1256
Number of pages7
JournalMalaysian Journal of Analytical Sciences
Volume21
Issue number6
DOIs
Publication statusPublished - 1 Dec 2017

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Thorium
Solvent extraction
Rare earth elements
Kerosene
Nitric Acid
monazite
Inductively coupled plasma mass spectrometry
Nitrates

ASJC Scopus subject areas

  • Analytical Chemistry

Cite this

Pengekstrakan pelarut torium daripada unsur nadir bumi dalam pekatan torium monazit. / Al-Areqi, Wadeeah M.; Bahri, Che Nor Aniza Che Zainul; Ab. Majid, Amran; Sarmani, Sukiman.

In: Malaysian Journal of Analytical Sciences, Vol. 21, No. 6, 01.12.2017, p. 1250-1256.

Research output: Contribution to journalArticle

Al-Areqi, Wadeeah M. ; Bahri, Che Nor Aniza Che Zainul ; Ab. Majid, Amran ; Sarmani, Sukiman. / Pengekstrakan pelarut torium daripada unsur nadir bumi dalam pekatan torium monazit. In: Malaysian Journal of Analytical Sciences. 2017 ; Vol. 21, No. 6. pp. 1250-1256.
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abstract = "Solvent extraction is a powerful separation technique in the preparation of nuclear grade thorium. In this study, monazite thorium concentrates produced from Malaysian monazite were used. Thorium was extracted from an aqueous nitric acid medium with TBP (30{\%}) in kerosene and Aliquat-336 (10{\%}) in kerosene, respectively. Constant experimental conditions were used for the extraction in terms of the molarity of nitric acid, concentration of extractants in kerosene, organic/aqueous volumetric ratio, mixing time, and contact time between phases. The stripping process was carried out with distilled water. The determination of thorium and rare earth elements (REEs) in the monazite thorium concentrates and aqueous solutions were performed by using inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of thorium in the thorium concentrate samples were in the range of 11.58-83.56{\%}. Three stages of extraction and three stages of stripping were carried out for the extraction of thorium from the REEs in the nitrate solution. The results of the study showed that the thorium extraction efficiency was in the range of 60.96-99.75{\%} using TBP (30{\%}) in kerosene and Aliquat-336 (10{\%}) in kerosene. Thorium was stripped from the loaded TBP (30{\%}) in kerosene and Aliquat-336 (10{\%}) in kerosene at an average stripping percentage of 89.04{\%} and 75.75{\%}, respectively. The stripped aqueous solutions were analysed, and it was shown that the thorium content was in the range of 29.49-91.28{\%}. This study indicated that both extractants can be successfully used to recover thorium from REEs, but in order to increase the purification of thorium, the extraction and stripping process cycle should be increased.",
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AB - Solvent extraction is a powerful separation technique in the preparation of nuclear grade thorium. In this study, monazite thorium concentrates produced from Malaysian monazite were used. Thorium was extracted from an aqueous nitric acid medium with TBP (30%) in kerosene and Aliquat-336 (10%) in kerosene, respectively. Constant experimental conditions were used for the extraction in terms of the molarity of nitric acid, concentration of extractants in kerosene, organic/aqueous volumetric ratio, mixing time, and contact time between phases. The stripping process was carried out with distilled water. The determination of thorium and rare earth elements (REEs) in the monazite thorium concentrates and aqueous solutions were performed by using inductively coupled plasma mass spectrometry (ICP-MS). The concentrations of thorium in the thorium concentrate samples were in the range of 11.58-83.56%. Three stages of extraction and three stages of stripping were carried out for the extraction of thorium from the REEs in the nitrate solution. The results of the study showed that the thorium extraction efficiency was in the range of 60.96-99.75% using TBP (30%) in kerosene and Aliquat-336 (10%) in kerosene. Thorium was stripped from the loaded TBP (30%) in kerosene and Aliquat-336 (10%) in kerosene at an average stripping percentage of 89.04% and 75.75%, respectively. The stripped aqueous solutions were analysed, and it was shown that the thorium content was in the range of 29.49-91.28%. This study indicated that both extractants can be successfully used to recover thorium from REEs, but in order to increase the purification of thorium, the extraction and stripping process cycle should be increased.

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