A comprehensive study for the potential removal of 152+154Eu radionuclides using a promising modified strontium-based MOF

Reda R Sheha; Sheta M Sheta; Mohamed A Hamouda; Said M El-Sheikh; A T Kandil; Omnia I Ali

doi:10.1016/j.jenvrad.2023.107287

A comprehensive study for the potential removal of ^152+154Eu radionuclides using a promising modified strontium-based MOF

J Environ Radioact. 2023 Dec:270:107287. doi: 10.1016/j.jenvrad.2023.107287. Epub 2023 Sep 5.

Authors

Reda R Sheha¹, Sheta M Sheta², Mohamed A Hamouda³, Said M El-Sheikh⁴, A T Kandil³, Omnia I Ali³

Affiliations

¹ Nuclear Chem. Dept., Hot Lab Center, Egyptian Atomic Energy Authority, P. O. 13759, Cairo, Egypt. Electronic address: rsheha68@yahoo.com.
² Inorganic Chemistry Department, National Research Centre, 33 El-Behouth St., Dokki, Giza, 12622, Egypt. Electronic address: dr.sheta.nrc@gmail.com.
³ Chemistry Department, Faculty of Science, Helwan University, Ain Helwan, Cairo, 11795, Egypt.
⁴ Nanomaterials and Nanotechnology Department, Central Metallurgical R & D Institute, Cairo, 11421, Egypt.

PMID: 37677908
DOI: 10.1016/j.jenvrad.2023.107287

Abstract

A facile modification of a strontium-based MOF using oxalic acid was carried out to prepare MTSr-OX MOF, which was used as a potential substance for eliminating ^152+154Eu radioisotopes. Various analytical techniques were used to characterize MTSr-OX-MOF. The prepared MOF had a rod-like structure with a BET surface area of 101.55 m² g^-1. Batch sorption experiments were used to investigate the sorption performance of MTSr-OX-MOF towards ^152+154Eu radionuclides where different parameters like pH, contact time, initial ^152+154Eu concentration, ionic strength, and temperature were scrutinized to determine the optimum conditions for ^152+154Eu removal. MTSr-OX-MOF showed superior effectiveness in the elimination of ^152+154Eu with a maximum sorption capacity of 234.72 mg g^-1 at pH 3.5. Kinetics fitted with the pseudo-second-order model and the Langmuir model correctly described the sorption mechanism. The thermodynamic variables were carefully examined, demonstrating that the ^152+154Eu sorption was endothermic as well as spontaneous. The MTSr-OX-MOF has been found to be a significantly more effective sorbent towards ^152+154Eu than that of many other adsorbents. When applied to real active waste, MTSr-OX-MOF demonstrated excellent removal performance for a wide range of radionuclides. As a result, the MTSr-OX-MOF can be recognized as an attractive solution for the ^152+154Eu purification from active waste.

Keywords: Claimed changes; Europium; Functionalization; Radionuclides; Removal; Strontium-based MOF.

MeSH terms

Adsorption
Hydrogen-Ion Concentration
Kinetics
Radiation Monitoring*
Radioisotopes
Strontium / analysis
Thermodynamics
Water Pollutants, Chemical* / chemistry

Substances

Strontium
Radioisotopes
Water Pollutants, Chemical