Equilibrium, Kinetic and Thermodynamic Studies for the Retention of Cesium-137 from Wastewater Using Low-Cost Sorbent
Maree, R., Ali, M., Hamed, M., Helal, A. (2023). Equilibrium, Kinetic and Thermodynamic Studies for the Retention of Cesium-137 from Wastewater Using Low-Cost Sorbent. EKB Journal Management System, 56(5), 1-10. doi: 10.21608/ajnsa.2023.129166.1565
Ragab Mohasab Maree; Mahmoud Elsayed Ali; Mostafa M. Hamed; Ali Helal. "Equilibrium, Kinetic and Thermodynamic Studies for the Retention of Cesium-137 from Wastewater Using Low-Cost Sorbent". EKB Journal Management System, 56, 5, 2023, 1-10. doi: 10.21608/ajnsa.2023.129166.1565
Maree, R., Ali, M., Hamed, M., Helal, A. (2023). 'Equilibrium, Kinetic and Thermodynamic Studies for the Retention of Cesium-137 from Wastewater Using Low-Cost Sorbent', EKB Journal Management System, 56(5), pp. 1-10. doi: 10.21608/ajnsa.2023.129166.1565
Maree, R., Ali, M., Hamed, M., Helal, A. Equilibrium, Kinetic and Thermodynamic Studies for the Retention of Cesium-137 from Wastewater Using Low-Cost Sorbent. EKB Journal Management System, 2023; 56(5): 1-10. doi: 10.21608/ajnsa.2023.129166.1565

Equilibrium, Kinetic and Thermodynamic Studies for the Retention of Cesium-137 from Wastewater Using Low-Cost Sorbent

Arab Journal of Nuclear Sciences and Applications
Volume 56, Issue 5, October 2023, Page 1-10  XML PDF (766.78 K)
Document Type: Original Article
DOI: 10.21608/ajnsa.2023.129166.1565
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Authors
Ragab Mohasab Maree email 1; Mahmoud Elsayed Ali2; Mostafa M. Hamedorcid 3; Ali Helal4
1Radiation protection-Hot labs center Egyptian Atomic Energy Authority
2Egyptian Atomic Energy authority, Hot Labs. Center
3Hot Lab. Center, Atomic Energy Authority, Egypt
4Egyptian Atomic Energy Authority
Abstract
Herein, sorption of 137Cs onto modified activated carbon (MAC) was carried out implying kinetics and equilibrium studies. The sorption results obeyed to a pseudo-1st-order kinetic and were applied to different isotherm models. According to the correlation coefficients,R2, the Langmuir, Freundlich, and Frumkin isotherm models successfully described the obtained data rather than Temkin isotherm. Based on the R2, the equilibrium data followed the sequence Langmuir>Freundlich>Frumkin>Temkin isotherm. The negative values of Gibbs free energy revealed that the removal process was feasible and spontaneous. The negative values of enthalpy clarified that the process is an exothermic one, suggesting that retention of 137Cs decreased with raising reaction temperatures. The values of ΔH << 25 kJ/mol indicating that the adsorption process of cesium 137Cs ions onto MAC is a physical adsorption process while the positive entropy values demonstrated an increase in randomness among the solid-liquid phase during adsorption. Finally, the sorption results revealed that the MAC is a suitable material for the capture of 137Cs from low-level radioactive waste.
Keywords
137Cs; Modified Activated Carbon; Isotherm Modeling; Low-Level Radioactive Waste
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