Abstract
The sorption of U(VI) from aqueous solutions on zeolite X has been studied by a batch technique. Distribution coefficients (Kd) were determined for sorption systems as a function of sorbate concentration, pH, contact time and temperature. The sorption isotherm was formed according to the Langmuir isotherm. Thermodynamic parameters have been determined at different temperatures. The ΔH° values for U(VI) on zeolite X were -29.5147 kJ mol-1 at 313 K at pH 3 and -19.8705 kJ mol-1 at 303 K at pH 9. The sorption of U(VI) on zeolite X is an exothermic in nature. Negative values of ΔG° show the spontaneous values for U(VI) that become less negative at higher temperatures, which shows that sorption is less favoured at higher temperatures.
Original language | English |
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Pages (from-to) | 769-773 |
Number of pages | 5 |
Journal | Journal of Alloys and Compounds |
Volume | 271-273 |
DOIs | |
Publication status | Published - 12 Jun 1998 |
Externally published | Yes |
Keywords
- Adsorption isotherms
- Uranium adsorption
- Zeolite
- Zeolite X