Synergistic removal of arsanilic acid using adsorption and magnetic separation technique based on Fe3O4@ graphene nanocomposite

A self-assemble nanocomposite of the nano-Fe3O4 and the reduced graphene oxide with D-glucose as the reductant and FeCl3 and graphene oxide as the pristine materials was prepared by an one-pot hydrothermal method. The adsorption capacity of arsanilic acid by the nanocomposite was found to be 313.7 +/- 11.2 mg g(-1), reach the equilibrium within 15 min, and was independent of pH (3-6) and the concentrations of ammonia nitrogen up to 1000 mg L-1. The adsorption of arsanilic acid followed pseudo-second-order kinetic model and Langmuir isotherm and was an endothermic and spontaneous process. (C) 2018 Published by Elsevier B.V. on behalf of The Korean Society of Industrial and Engineering Chemistry.