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

  • A. Morsy
  • M. H. Taha
  • Muhammad Saeed
  • Amir Waseem
  • Muhammad Asad Riaz
  • M. M. ElmaadawyEmail author


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.


Uranium Adsorption Phosphoric acid Hydrazine Carbon 


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Copyright information

© China Science Publishing & Media Ltd. (Science Press), Shanghai Institute of Applied Physics, the Chinese Academy of Sciences, Chinese Nuclear Society and Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • A. Morsy
    • 1
  • M. H. Taha
    • 1
  • Muhammad Saeed
    • 2
  • Amir Waseem
    • 2
  • Muhammad Asad Riaz
    • 2
  • M. M. Elmaadawy
    • 1
    Email author
  1. 1.Nuclear Materials AuthorityCairoEgypt
  2. 2.Department of ChemistryQuaid-i-Azam UniversityIslamabadPakistan

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