he growing need for energy sources has led to intensified exploration of nuclear energy. Uranium, a radiotoxic and chemotoxic element, is widely used as nuclear fuel and in military sectors. However, concerns regarding its environmental and health risks highlight the importance of effective removal and recovery strategies. Among existing methods, ion exchange adsorption has gained attention due to its high selectivity, reversibility, and rapid kinetics. This research examines uranium adsorption from pregnant leach solutions (PLS) provided by the Jordan Uranium Mining Company (JUMCO) using the commercial ion-exchange resin MonoPlus M-800. The adsorption process was assessed through isothermal, thermodynamic, and kinetic studies. Experimental findings demonstrate that adsorption efficiency is influenced by pH, with the highest uranium uptake occurring at a pH of 10.3, 323 K, and an adsorbent concentration of 1 g L−1. The Langmuir isotherm model accurately represented the adsorption mechanism, indicating monolayer formation, with a maximum adsorption capacity of 126.6 mg g−1. The thermodynamic analysis confirmed an endothermic, spontaneous process with increased adsorption favorability at higher temperatures. Kinetic analysis revealed that uranium adsorption onto M-800 resin follows a linear driving force model, reaching equilibrium within 120 min. Furthermore, desorption trials revealed an 80 % recovery efficiency after five cycles, demonstrating the resin's stability and reusability. These results highlight MonoPlus M-800 as a highly effective adsorbent for uranium recovery from leach solutions, contributing to environmental remediation and resource sustainability in uranium mining operations.
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