LAUSR

Abstract In this present study, thorium ion [Th(SO4)32-] was removed from aqueous sulphate medium using fabricated activated carbon-based electrodes (CBE). The thermal cross-linking technique was used to synthesize the CBE. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) technique, X-ray photoelectron spectroscopy (XPS) and field emission scanning electron microscopy (FESEM) were used to characterize the CBE adsorbent. The adsorptive characteristics were investigated through batch static adsorption experiments by varying the concentration, time and applied voltage. The adsorption statistics were justified by isotherm and kinetic models. The Langmuir and Freundlich adsorption model was revealed to be fitted, with a maximum adsorption capacity of 8.4 mg-Th/ g-Carbon. The electrosorption of [Th(SO4)32-] onto the CBE followed the pseudo-first and second-order kinetic rate models. Through FESEM, XRD and XPS characterization studies, a suitable mechanism for thorium sorption has been postulated.