A modified method for removal and stabilization of cesium metal in vitrified matrix
Vernadsky National Library of Ukraine
Переглянути архів Інформація| Поле | Співвідношення | |
| Title |
A modified method for removal and stabilization of cesium metal in vitrified matrix
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| Creator |
Ghaffar Abdul
Mazhar Farhana Mashiatullah Azhar Abdulaziz S. Alaamer |
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| Subject |
Физическая химия процессов обработки воды
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| Description |
Laboratory experiments were designed to investigate the separation and stabilization of cesium metal. Cesium was removed from simulated waste through sorption under certain physicochemical conditions. Silica sand (locally purchased) was used to remove cesium from simulated liquid waste. The range of pH and temperature was optimized and maximum removal (94 – 98 %) of cesium was achieved with pH 10 at temperature 36°C. Under optimized conditions with temperature range of 301– 315K ΔH, ΔS and ΔG309K for 150 ppm solution are – 27.22±0.18 KJ/mol, – 74.1± 0.96 J/mol and – 3071±2.1 KJ/mol respectively, and for 200 ppm solution thermodynamic entities are ΔH= – 20.2±0.20 KJ/mol, ΔS = – 47.86±0.66 J/mol and G301K = – 4344±3.7 KJ/mol. The sorbed metal ion has chances of desorption under changed physicochemical conditions in final disposal. To overcome this problem the final "secondary waste (metals on sorbents)" was stabilized by converting it into a stable vitreous borosilicate matrix through vitrification process to prevent leaching. It was found that the sorbed cesium was evaporated during heating at 1250°C. The evaporation of cesium during vitrification was overcome by modifying the process. This modified vitrification process is found excellent to immobilize the sorbed cesium. Stability was tested by desorption attempts at different pH.
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| Date |
2018-02-20T16:21:17Z
2018-02-20T16:21:17Z 2012 |
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| Type |
Article
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| Identifier |
A modified method for removal and stabilization of cesium metal in vitrified matrix / Ghaffar Abdul, Mazhar Farhana, Mashiatullah Azhar, Abdulaziz S. Alaamer // Химия и технология воды. — 2012. — Т. 34, № 6. — С. 440-449. — Бібліогр.: 22 назв. — англ.
0204-3556 http://dspace.nbuv.gov.ua/handle/123456789/130732 |
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| Language |
en
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| Relation |
Химия и технология воды
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| Publisher |
Інститут колоїдної хімії та хімії води ім. А.В. Думанського НАН України
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