Stripping study of U(VI) from loaded TBP/n-paraffin using ammonium nitrate bearing waste as strippant
| Autor: | Sujoy Biswas, S. B. Roy, Sadhana Bhattacharya, Shrishma Paik |
|---|---|
| Rok vydání: | 2012 |
| Předmět: |
Aqueous solution
Stripping (chemistry) Precipitation (chemistry) Health Toxicology and Mutagenesis Ammonium nitrate Inorganic chemistry Public Health Environmental and Occupational Health chemistry.chemical_element Uranium Pollution Endothermic process Analytical Chemistry Solvent chemistry.chemical_compound Nuclear Energy and Engineering Distilled water chemistry Radiology Nuclear Medicine and imaging Spectroscopy Nuclear chemistry |
| Zdroj: | Journal of Radioanalytical and Nuclear Chemistry. 295:2141-2146 |
| ISSN: | 1588-2780 0236-5731 |
| DOI: | 10.1007/s10967-012-2267-z |
| Popis: | Stripping studies of U(VI) from loaded solvent TBP/n-paraffin was carried out using ammonium nitrate solution as strippant. Effects of various stripping parameters such as concentration of ammonium nitrate solution, U(VI) concentration in organic phase, initial pH of strippant, temperature etc. have been investigated in detail. Kinetics of the stripping process by ammonium nitrate was found to be slower than that of stripping with water. It was observed that with the increase in ammonium nitrate concentration in aqueous solution, stripping of U(VI) decreased. With the increase in U(VI) loading in the organic phase, there was an increase in uranium stripping for ammonium nitrate whereas for distilled water it becomes reverse. With the increase in pH of the aqueous ammonium nitrate solution, stripping increased up to a certain pH of 8.5 and after that precipitation of uranium started. Increase in temperature of the biphasic system shows an enhancing effect of U(VI) stripping. Evaluation of thermodynamic data such as ∆H indicated that the process is endothermic. Based on the optimized conditions, McCabe–Thiele diagram was constructed for U(VI) stripping using ammonium nitrate solution at room temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink