Isothermal, kinetic, and thermodynamic studies for solid-phase extraction of uranium (VI) via hydrazine-impregnated carbon-based material as efficient adsorbent
| Autor: | Muhammad Saeed, A. Morsy, Muhammad Asad Riaz, Amir Waseem, M. M. El-Maadawy, Mohamed H. Taha |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Nuclear and High Energy Physics
Langmuir Materials science 010308 nuclear & particles physics Extraction (chemistry) Inorganic chemistry chemistry.chemical_element Uranium 01 natural sciences Isothermal process Adsorption Nuclear Energy and Engineering chemistry 0103 physical sciences medicine Freundlich equation Solid phase extraction 010306 general physics Activated carbon medicine.drug |
| Zdroj: | Nuclear Science and Techniques. 30 |
| ISSN: | 2210-3147 1001-8042 |
| DOI: | 10.1007/s41365-019-0686-z |
| Popis: | The current study describes the application of a new extraction method for efficient uranium adsorption via cost-effective hydrazine-impregnated activated carbon. Various experimental parameters such as time, adsorbent weight, temperature (°C), and uranium concentration were thoroughly investigated. The synthesized adsorbent was characterized via X-ray diffraction, Fourier transformation infrared spectroscopy (FT-IR), scanning electron microscopy, and thermogravimetric analysis. The results showed 86% uranium extraction under optimized conditions (20% P2O5 at 25 °C, 120 min). The obtained findings fit well with thermodynamic and isothermal (Langmuir and Freundlich isotherms) models and pseudo second-order kinetics. In thermodynamic studies, the negative sign of (∆G°) specified the spontaneity of process, the negative sign of (∆H°) revealed endothermicity, and the positive sign of (∆S°) showed high randomness after adsorption. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink