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Interpretation of the Tungstate Anion Adsorption Behavior on Bio-Rex 5 resin in 188W/188Re Generator System |
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PP: 87-94 |
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doi:10.18576/jrna/100201
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Author(s) |
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Mohamed A. Gizawy,
Ebrahiem Esmail Ebrahiem,
R. M. Abobeah,
Tarek M. Aboul-Fotouh,
Amr Ahmad Yaseen,
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Abstract |
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| Rhenium-188 (188Re), a β- -emitting radionuclide, holds considerable promise for targeted radionuclide therapy due to its favorable physical and chemical properties. This study explores the adsorption behavior of tungstate ions onto Bio-Rex 5 anionic resin under various conditions to enhance the efficiency of 188W/188Re generator. Batch adsorption experiments revealed that the maximum adsorption capacity was achieved within 15 min. of contact time and at an initial tungstate concentration of 250 ppm. Kinetic modeling indicated that the adsorption process aligns with a pseudo-second-order model, suggesting chemisorption as the dominant mechanism. The Langmuir model provided the best description of adsorption isotherms, suggesting monolayer adsorption on a homogeneous surface. Thermodynamic analysis demonstrated an endothermic process with a positive ΔH and ΔS along with a negative ΔG, confirming spontaneity. These findings provide valuable insights into the optimization of tungstate ion adsorption, paving the way for the development of an efficient and reliable 188W/188Re generator system in theranostic applications.
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