RANU SINGH, JAYATI CHATTERJEE MITRA, SANTOSH KUMAR SAR, SHASHI KANT JAISWAL, PANKAJ TAMRAKAR
DOI: https://doi.org/Modified low-cost adsorbents, specifically Bentonite clay mineral, have been studied and analysed for their efficacy in removing uranium from soil and rock. It was determined that Temkin was the most appropriate representation for adsorption isotherms, with R2 = 0.95. On the other hand, the kinetic analysis was characterized by pseudo second order (R2 = 0.99). The adsorption capacity of modified Bentonite is 24.75 µg/l. XRF, SEM, and EDS investigations were performed to characterize the adsorption characteristics of the modified clay Bentonite surface area. Bentonite at a dosage of 0.1 g per 50 ml of adsorbent effectively eliminated 95% of U(VI) from a metal ion solution with a concentration of 50 µg/l at 308 K within 40 minutes. The equilibrium adsorption is documented at pH =7. Various thermodynamic characteristics have been evaluated, including Gibbs free energy, entropy, and enthalpy. To validate the findings of the modified clay (Bentonite) laboratory study referenced above, we conducted uranium adsorption tests with natural soil and rock samples contaminated with naturally occurring uranium and succeeded in removing 87% and 85% of the rock and soil samples.
