Equilibrium Kinetic and Thermodynamics Studies of Uranium Adsorption by Natural Clinoptilolite from Acidic Medium

El Shamy, Hagar Nasser; Khalil, Mostafa; Atrees, Mohamed Shaaban; Haggag, El-Sayed Ali; El Aoady, Mohamed Ismaiel Mahmoud; Tawfik, Amira Mohamed; Salem, Hend Abdelkhalik

doi:10.21608/ejchem.2021.98150.4573

	Equilibrium Kinetic and Thermodynamics Studies of Uranium Adsorption by Natural Clinoptilolite from Acidic Medium
Egyptian Journal of Chemistry
Article 13, Volume 65, Issue 7, July 2022, Page 121-129 PDF (594.72 K)
Document Type: Original Article
DOI: 10.21608/ejchem.2021.98150.4573
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Authors
Hagar Nasser El Shamy¹; Mostafa Khalil ¹; Mohamed Shaaban Atrees ²; El-Sayed Ali Haggag²; Mohamed Ismaiel Mahmoud El Aoady²; Amira Mohamed Tawfik²; Hend Abdelkhalik Salem²
¹Department Chemistry, Faculty of Science - Ain Shams University
²Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, Egypt
Abstract
The equilibrium and kinetic characteristics of the natural clinoptilolite from acidic medium have been determined. The adsorption parameters including pH, contact time, stirring rate and temperature have been optimized. The practical adsorption capacity of uranium upon the resin under the optimum conditions has been found to attain 5 mg/g which matches with Langmuir isotherm 4.48 mg/g. The physical parameters including the adsorption kinetics, the isotherm models and the thermodynamic data have also been determined to describe the nature of the uranium adsorption by the natural clinoptilolite. The working natural clinoptilolite found to agree with both the pseudo second order reaction and the Langmuir isotherm. Scanning electron microscope (SEM), X-ray diffraction (XRD), and Thermogravimetric analysis (TGA) were used to examine the structure of the resulting adsorbent.
Keywords
Natural clinoptilolite; uranium adsorption; kinetics; thermodynamics


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