Sorption behaviour of 137Cs and 152+154Eu onto bentonite phosphate modified with nickel: kinetics, isotherms, and chromatographic column application

Mohamed R. Abass; Sara S. Mahrous; Muhammad S. Mansy

doi:10.1515/ract-2023-0168

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Sorption behaviour of ¹³⁷Cs and ^152+154Eu onto bentonite phosphate modified with nickel: kinetics, isotherms, and chromatographic column application

Mohamed R. Abass , Sara S. Mahrous and Muhammad S. Mansy

Published/Copyright: November 3, 2023

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From the journal Radiochimica Acta Volume 112 Issue 1

Abstract

Using batch and column procedures, the present work investigated the sorption behaviour of ¹³⁷Cs and ^152+154Eu by bentonite phosphate modified with nickel (BPN) sorbent. The kinetic data obey pseudo-1^st-order for ¹³⁷Cs and follow pseudo-2^nd-order for ^152+154Eu. Various sorption isotherm models were used to analyze equilibrium data. The thermodynamic functions reflect an endothermic and spontaneous sorption process. HCl (about 95.35 %) and CaCl₂ (about 98.13 %) showed the optimum eluents for the complete recovery of both ¹³⁷Cs and ^152+154Eu, respectively. Finally, column data show that ¹³⁷Cs and ^152+154Eu may be loaded on BNP sorbent and separated from an aqueous solution using a variety of HCl concentrations as eluent. The obtianed results revealed that BNP sorbent is suitable for recovering ¹³⁷Cs and ^152+154Eu from low-level radioactive waste effluents (LLW).

Keywords: 137Cs; 152+154Eu; column; desorption; isotherm; low-level radioactive waste

Corresponding author: Mohamed R. Abass, Nuclear Fuel Technology Department, Hot Laboratories and Waste Management Center, Egyptian Atomic Energy Authority, Cairo, Egypt, E-mail: mohamed.ragab2014300@yahoo.com

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Competing interests: The authors declare no conflicts of interest regarding this article.
Research funding: This work was funded by Egyptian Atomic Energy Authority.

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Received: 2023-05-06

Accepted: 2023-09-25

Published Online: 2023-11-03

Published in Print: 2024-01-29

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https://doi.org/10.1515/ract-2023-0168

Keywords for this article

137Cs; 152+154Eu; column; desorption; isotherm; low-level radioactive waste