Sorption characteristics of bismuth tungstate nanostructure for removal of some radionuclides from aqueous solutions

Treatment and ensuring the safe elimination of radioactive wastes are significant challenges in nuclear facilities; achieving this target is essential with the increment in employing nuclear energy in several applications. Herein, nanostructured rods-like shape bismuth tungstate Bi2WO6 was synthesized using the eco-friendly sol–gel method and characterized by different techniques. The ability of nanostructured bismuth tungstate for the removal of radioactive cesium and europium from the liquid phase was evaluated to protect the environment. X-ray diffraction and Fourier transform infrared spectrum confirmed the successful preparation of bismuth tungstate. Also, the transmission electron microscope exhibited that the Bi2WO6 has a rods-like structure in the nano-range. Further, the adsorption processes were achieved, and many parameters as pH of the medium, contact time, initial metal ion concentration, and temperature were studied. Also, it is clear that the bismuth tungstate can be utilized for many cycles. Furthermore, kinetic adsorption studies have been discussed. Besides, the parameters of thermodynamic were investigated. The negative value of Gibbs free energy and the positive value of enthalpy unveiled that the sorption process possesses a spontaneous and endothermic nature.