A GREEN AND ECONOMICAL METHOD FOR URANIUM REMOVAL

A. N. Siyal, M. S. Kalhoro, S. Q. Memon

Abstract


Banana Peel a largely produced fruit waste has been utilized to remove/preconcentrate Uranium from aqueous solution. Removal was characterized by Fourier Transform Infra Red spectroscopy and SEM techniques. Effect of pH on removal of Uranium showed the gradual increase in removal up to pH 3 then was nearly constant up to pH 10. A 1710±10 μg of Uranium was removed  per 100 mg  of  banana  peel  within the exposure time of 30 min. Maximum removal of 1800±10 μg per 100 mg of banana peel was achieved after exposure time of 24 hr. Energy dispersive X-ray analysis of Uranium adsorbed banana peel showed a peak of Uranium at 3.2 keV  which  confirmed  the  adsorption  of  Uranium  onto  banana  peel.  FT-IR spectroscopy confirmed  the  involvement  of –COOH group in adsorption of Uranium on banana  peel. Data  followed the kinetic models in the order: Pseudo-First order Model> Elovich Model >Intra-particle diffusion Model. Adsorbed Uranium was recovered with 5 ml of 0.1M HNO3.


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