In this paper, we present a recent study in the adsorption of uranium from an aquatic environment by reduced graphene oxide - ferrite – polyaniline (RGO/CNF/PANI) composite. Uranium concentration was carried out by batch techniques. The effect of pH, contact time, concentration of equilibrium state and reusability on uranium adsorption capacity have been studied. The adsorption process was accomplished within 240 min and could be well described by the pseudo-second-order model. | Vietnam Journal of Science and Technology 56 (1A) (2018) 25-32 RGO/CNF/PANI AS AN EFFECTIVE ADSORBENT FOR THE ADSORPTION OF URANIUM FROM AQUEOUS SOLUTION Tran Quang Dat*, Nguyen Vu Tung, Pham Van Thin, Do Quoc Hung Le Quy Don Technical University, 236 Hoang Quoc Viet Street, Ha Noi * Email: dattqmta@ Received: 15 August 2017; Accepted for publication: 5 February 2018 ABSTRACT In this paper, we present a recent study in the adsorption of uranium from an aquatic environment by reduced graphene oxide - ferrite – polyaniline (RGO/CNF/PANI) composite. Uranium concentration was carried out by batch techniques. The effect of pH, contact time, concentration of equilibrium state and reusability on uranium adsorption capacity have been studied. The adsorption process was accomplished within 240 min and could be well described by the pseudo-second-order model. The adsorption isotherm agrees well with the Langmuir model, having a maximum adsorption capacity of 2000 mg/g, at pH = 5 and 25 oC. The RGO/CNF/PANI materials could be a promising absorbent for removing U (VI) in aqueous solution because of their high adsorption capacity and convenient magnetic separation. Keywords: , polyaniline, reduced graphene oxide, uranium, adsorption. 1. INTRODUCTION With fast improvement of atomic technologies, worries about wastewater treatment have prompted an incredible number of examinations to remove uranium squander from water. The radioactivity and toxicity of uranium present serious hazards to human beings [1]. There are different techniques to treat uranium from watery solutions, for example chemical precipitation, layer dialysis, dissolvable extraction, buoyancy and adsorption [2]. In those techniques, adsorption is presumably the most well-known technique. Advancement of adsorbents with high adsorption capacity, quick adsorption and simple detachment has gotten impressive enthusiasm for late years [3, 4]. The magnetic-based nanomaterials are
