Modification of uranium determination procedures by alpha spectrometry using graphene oxide functionalized 4-aminobenzenesulfonate

Abstract

Graphene oxide functionalized 4-aminobenzenesulfonate (sulfanilic acid) (GOSN) has been synthesized by the reaction of sulfanilic acid with graphene oxide for U(VI) ions adsorption from aqueous solutions. The controlling factors that affect the adsorption process have been studied using batch technique. The obtained results demonstrated that the maximum uranium adsorption capacity by GOSN was 320.57 mg g −1 , the obtained results were subjected to analysis by isotherm models, Langmuir and Freundlich models. The GOSN was characterized by FT-IR, BET isotherm studies, and SEM. The Uranium adsorption process was best described by the Langmuir isotherm model with a maximum adsorption capacity of 320.57 mg g −1 . It has been observed that the adsorption of uranium fitted better with the pseudo-second-order kinetics. The GOSN adsorbent exhibited greater adsorption capacity than graphene oxide for hexavalent uranium and has potential application for U(VI) removal from aqueous solution.