Separation of tungsten and rhenium on alumina
The conditions for the efficient separation of tungsten(VI) and rhenium (VII) on alumina were established. The distribution coefficients Kd for tungstate and perrhenate anions, as well as the separation factors a (a = KdWO42-/Kd ReO4-) were determined using hydrochloric or nitric acid as the aqueous...
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| Format: | Article |
| Language: | English |
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Serbian Chemical Society
2004-09-01
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| Series: | Journal of the Serbian Chemical Society |
| Subjects: | |
| Online Access: | http://www.shd.org.yu/HtDocs/SHD/Vol69/No8-9/V69-No8_9-10.pdf |
| _version_ | 1818208099973988352 |
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| author | MILOVAN SM. STOILJKOVIC DRAGOLJUB M. LUKIC JURIJ L. VUCINA |
| author_facet | MILOVAN SM. STOILJKOVIC DRAGOLJUB M. LUKIC JURIJ L. VUCINA |
| author_sort | MILOVAN SM. STOILJKOVIC |
| collection | DOAJ |
| description | The conditions for the efficient separation of tungsten(VI) and rhenium (VII) on alumina were established. The distribution coefficients Kd for tungstate and perrhenate anions, as well as the separation factors a (a = KdWO42-/Kd ReO4-) were determined using hydrochloric or nitric acid as the aqueous media. A solution of sodium chloride in the pH range 26 was also examined. Under all the tested experimental conditions, alumina is a much better adsorbent for tungsten than for rhenium. The obtained results indicated that the best separation of these two elements is achieved when 0.01 0.1 mol dm-3 HCl or 1.0 mol dm-3 HNO3 are used as the aqueous media. If NaCl is used as the aqueous phase, the best separation is achieved with 0.20 mol dm-3 NaCl, pH 46. Under these experimental conditions, the breakthrough and saturation capacities of alumina for tungsten at pH 4 are 17 and 26 mg W/g Al2O3, respectively. With increasing pH, these values decrease. Thus, at pH 6 they are only 4 and 13 mg W/g Al2O3, respectively. |
| first_indexed | 2024-12-12T04:39:26Z |
| format | Article |
| id | doaj.art-49350b7b264e4daf9866bb797275c819 |
| institution | Directory Open Access Journal |
| issn | 0352-5139 |
| language | English |
| last_indexed | 2024-12-12T04:39:26Z |
| publishDate | 2004-09-01 |
| publisher | Serbian Chemical Society |
| record_format | Article |
| series | Journal of the Serbian Chemical Society |
| spelling | doaj.art-49350b7b264e4daf9866bb797275c8192022-12-22T00:37:51ZengSerbian Chemical SocietyJournal of the Serbian Chemical Society0352-51392004-09-01698-9683688Separation of tungsten and rhenium on aluminaMILOVAN SM. STOILJKOVICDRAGOLJUB M. LUKICJURIJ L. VUCINAThe conditions for the efficient separation of tungsten(VI) and rhenium (VII) on alumina were established. The distribution coefficients Kd for tungstate and perrhenate anions, as well as the separation factors a (a = KdWO42-/Kd ReO4-) were determined using hydrochloric or nitric acid as the aqueous media. A solution of sodium chloride in the pH range 26 was also examined. Under all the tested experimental conditions, alumina is a much better adsorbent for tungsten than for rhenium. The obtained results indicated that the best separation of these two elements is achieved when 0.01 0.1 mol dm-3 HCl or 1.0 mol dm-3 HNO3 are used as the aqueous media. If NaCl is used as the aqueous phase, the best separation is achieved with 0.20 mol dm-3 NaCl, pH 46. Under these experimental conditions, the breakthrough and saturation capacities of alumina for tungsten at pH 4 are 17 and 26 mg W/g Al2O3, respectively. With increasing pH, these values decrease. Thus, at pH 6 they are only 4 and 13 mg W/g Al2O3, respectively.http://www.shd.org.yu/HtDocs/SHD/Vol69/No8-9/V69-No8_9-10.pdftungstenrheniumseparation factordistribution coefficient |
| spellingShingle | MILOVAN SM. STOILJKOVIC DRAGOLJUB M. LUKIC JURIJ L. VUCINA Separation of tungsten and rhenium on alumina Journal of the Serbian Chemical Society tungsten rhenium separation factor distribution coefficient |
| title | Separation of tungsten and rhenium on alumina |
| title_full | Separation of tungsten and rhenium on alumina |
| title_fullStr | Separation of tungsten and rhenium on alumina |
| title_full_unstemmed | Separation of tungsten and rhenium on alumina |
| title_short | Separation of tungsten and rhenium on alumina |
| title_sort | separation of tungsten and rhenium on alumina |
| topic | tungsten rhenium separation factor distribution coefficient |
| url | http://www.shd.org.yu/HtDocs/SHD/Vol69/No8-9/V69-No8_9-10.pdf |
| work_keys_str_mv | AT milovansmstoiljkovic separationoftungstenandrheniumonalumina AT dragoljubmlukic separationoftungstenandrheniumonalumina AT jurijlvucina separationoftungstenandrheniumonalumina |