Abstract
The removal of U(VI) ions from aqueous solutions with Bakul leaves was studied using a batch adsorption technique. The adsorption equilibrium, thermodynamics, and kinetic models were analyzed. The influence of pH, initial uranium concentration, contact time, temperature, and adsorbent dose on the uranium adsorption was estimated. The maximal uranium uptake was 86.4%. The U(VI) adsorption is well fitted using the Langmuir model and the pseudo-second-order model. Analysis of the thermodynamic functions of adsorption (ΔG°, ΔH°, ΔS°) at 303, 313 and 323 K shows that the adsorption on the surface of Bakul leaves is spontaneous and endothermic. Thus, Bakul leaves can be utilized as an economical, active, and eco-friendly adsorbent for uranium removal.
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