Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2019, Vol. 30 ›› Issue (11): 167 doi: 10.1007/s41365-019-0686-z

• NUCLEAR CHEMISTRY,RADIOCHEMISTRY,RADIOPHARMACEUTICALS AND NUCLEAR MEDICINE • Previous Articles     Next Articles

Isothermal, kinetic and thermodynamic studies for solid phase extraction of uranium (VI) via hydrazine impregnated carbon-based material as efficient adsorbent

A. Morsy1 • M. H. Taha1 • Muhammad Saeed2 • Amir Waseem2 • Muhammad Asad Riaz2 • M. M. Elmaadawy1   

  1. 1 Nuclear Materials Authority, El Maddi, P.O. Box 530, Cairo, Egypt
    2 Department of Chemistry, Quaid-i-Azam University, Islamabad 45320, Pakistan
  • Received:2019-03-20 Revised:2019-05-08 Accepted:2019-06-01
  • Contact: M. M. Elmaadawy E-mail:elma3dawi@yahoo.com
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A. Morsy, M.H. Taha, Muhammad Saeed, Amir Waseem, Muhammad Asad Riaz, M. M. Elmaadawy. Isothermal, kinetic and thermodynamic studies for solid phase extraction of uranium (VI) via hydrazine impregnated carbon-based material as efficient adsorbent.Nuclear Science and Techniques, 2019, 30(11): 167     doi: 10.1007/s41365-019-0686-z

Abstract: 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.

Key words: Uranium, Adsorption, Phosphoric acid, Hydrazine, Carbon