What is it about?
Glycidyl methacrylate resins immobilized with tetraethylenepentamine functionality were prepared. The application of obtained resins for removal of U(VI) from aqueous solution was carried out. The uptake process was found endothermic and followed pseudo-second-order kinetics. The uptake capacities of the resins were better compared to that reported by other investigators using different resins. Column studies showed low critical bed height values indicating the applicability of the resin for treatment of wastewater streams under flow conditions. The resins loaded by U(VI) are easily regenerated for repeated use using HNO3.
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Why is it important?
The uptake behavior of RIa and RIa-mag towards U(VI) in aqueous solutions using batch and column techniques were studied at different experimental conditions. The effect of embedded magnetite particles on the uptake capacity and rate of adsorption was clarified. The maximum uptake capacities obtained at 25C were 0.82 and 1.68 mmol/g for RIa and RIa-mag, respectively. Thermodynamic data showed a spontaneous endothermic adsorption process of second order kinetics. Regeneration efficiency of 97% was achieved using 0.5 M HNO3. The breakthrough as well as the critical bed height of the investigated resins towards the adsorption of U(VI) were calculated.
Perspectives
This higher regeneration efficiency along with the small critical bed height and easy separation from adsorption medium using external magnetic field indicate promising application in the field of U(VI) removal.
Dr Mahmoud Osman Abd El-Magied
Nuclear Materials Authority
Read the Original
This page is a summary of: Removal of uranium(VI) from aqueous solutions using glycidyl methacrylate chelating resins, Hydrometallurgy, February 2009, Elsevier,
DOI: 10.1016/j.hydromet.2008.05.037.
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