Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction
The present work deals with successive uranium and thorium recovery from the sulfate leach liquor of the ore deposit of the 5th Anomaly of Saghand using liquid-liquid extraction technique, where trioctylamine (TOA) and di-(2-ethylhexyl) phosphoric acid (D2EHPA) were used. The solvent extraction of u...
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| Format: | Article |
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Nuclear Science and Technology Research Institute
2014-02-01
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| Series: | مجله علوم و فنون هسته‌ای |
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| Online Access: | https://jonsat.nstri.ir/article_319_2bc6e20164e8f5ae8fa08a8f4a646c23.pdf |
| _version_ | 1797835135466340352 |
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| author | S A. Milani B Maraghe Mianji A. A Abhari |
| author_facet | S A. Milani B Maraghe Mianji A. A Abhari |
| author_sort | S A. Milani |
| collection | DOAJ |
| description | The present work deals with successive uranium and thorium recovery from the sulfate leach liquor of the ore deposit of the 5th Anomaly of Saghand using liquid-liquid extraction technique, where trioctylamine (TOA) and di-(2-ethylhexyl) phosphoric acid (D2EHPA) were used. The solvent extraction of uranium by trioctylamine in kerosene was investigated using Taguchi method. The extraction parameters were pH, extractant concentration, contact time and aqueous/organic volume ratio. The optimum conditions were determined as the extractant concentration of 5%, aqueous/organic volume ratio of 1, pH=1.6 and the contact time of 3 minutes. Under these conditions, the uranium extraction percent was 98.7% in a single step extraction process. For a deeper investigation of the achieved results by Taguchi method, the effect of different parameters such as contact time, temperature, concentration of extractant, and pH were considered. Thorium extraction from uranium extraction raffinate was performed by D2EHPA 4% in kerosene at pH=1.5-2 in a three step extraction process. The kinetic studies showed that the extraction follows a second order kinetics. The optimium conditions for the selective stripping (back extraction) of uranium and thorium from the loaded organic phases were obtained when 5.0 M nitric acid and 1 M sulfuric acide were used, respectively. |
| first_indexed | 2024-04-09T14:48:23Z |
| format | Article |
| id | doaj.art-f9f5e6e6c5b54004ac43ab31ba0f49f8 |
| institution | Directory Open Access Journal |
| issn | 1735-1871 2676-5861 |
| language | fas |
| last_indexed | 2024-04-09T14:48:23Z |
| publishDate | 2014-02-01 |
| publisher | Nuclear Science and Technology Research Institute |
| record_format | Article |
| series | مجله علوم و فنون هسته‌ای |
| spelling | doaj.art-f9f5e6e6c5b54004ac43ab31ba0f49f82023-05-02T10:31:57ZfasNuclear Science and Technology Research Instituteمجله علوم و فنون هسته‌ای1735-18712676-58612014-02-013443346319Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent ExtractionS A. Milani0B Maraghe Mianji1A. A Abhari2پژوهشکده‌ی چرخه‌ی سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانپژوهشکده‌ی چرخه‌ی سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانپژوهشکده‌ی چرخه‌ی سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران ـ ایرانThe present work deals with successive uranium and thorium recovery from the sulfate leach liquor of the ore deposit of the 5th Anomaly of Saghand using liquid-liquid extraction technique, where trioctylamine (TOA) and di-(2-ethylhexyl) phosphoric acid (D2EHPA) were used. The solvent extraction of uranium by trioctylamine in kerosene was investigated using Taguchi method. The extraction parameters were pH, extractant concentration, contact time and aqueous/organic volume ratio. The optimum conditions were determined as the extractant concentration of 5%, aqueous/organic volume ratio of 1, pH=1.6 and the contact time of 3 minutes. Under these conditions, the uranium extraction percent was 98.7% in a single step extraction process. For a deeper investigation of the achieved results by Taguchi method, the effect of different parameters such as contact time, temperature, concentration of extractant, and pH were considered. Thorium extraction from uranium extraction raffinate was performed by D2EHPA 4% in kerosene at pH=1.5-2 in a three step extraction process. The kinetic studies showed that the extraction follows a second order kinetics. The optimium conditions for the selective stripping (back extraction) of uranium and thorium from the loaded organic phases were obtained when 5.0 M nitric acid and 1 M sulfuric acide were used, respectively.https://jonsat.nstri.ir/article_319_2bc6e20164e8f5ae8fa08a8f4a646c23.pdfsuccessive separationsolvent extractionsaghand (anomaly no. 5) ore deposittoad2ehpakinetic |
| spellingShingle | S A. Milani B Maraghe Mianji A. A Abhari Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction مجله علوم و فنون هسته‌ای successive separation solvent extraction saghand (anomaly no. 5) ore deposit toa d2ehpa kinetic |
| title | Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction |
| title_full | Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction |
| title_fullStr | Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction |
| title_full_unstemmed | Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction |
| title_short | Successive Uranium and Thorium Separation from Leach Liquor of Ore Deposit of 5th Anomaly of Saghand by Solvent Extraction |
| title_sort | successive uranium and thorium separation from leach liquor of ore deposit of 5th anomaly of saghand by solvent extraction |
| topic | successive separation solvent extraction saghand (anomaly no. 5) ore deposit toa d2ehpa kinetic |
| url | https://jonsat.nstri.ir/article_319_2bc6e20164e8f5ae8fa08a8f4a646c23.pdf |
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