Graphene oxide/cellulose membranes in adsorption of divalent metal ions

摘要: In this paper, graphene oxide/cellulose membranes were prepared in order to perform effective adsorption of heavy metal ions: cobalt, nickel, copper, zinc, cadmium and lead. Two types fabricated, i.e. pressed non-pressed membranes. The experiment showed that the are highly durable at different pH values, even basic solutions, they can be applied separation/removal ions during vigorous shaking aqueous solution. proved less stable, however, successfully filtration process high flow-rates. results batch experiments measurements by inductively coupled plasma atomic emission spectroscopy (ICP-OES) indicated maximum achieved 4–8. Adsorption isotherms kinetic studies sorption on occurs a monolayer coverage, hence it is controlled chemical involving strong surface complexation with oxygen-containing groups oxide. capacity values Co(II), Ni(II), Cu(II), Zn(II), Cd(II) Pb(II) 4.5 15.5, 14.3, 26.6, 16.7, 26.8, 107.9 mg g−1, respectively. competitive affinities for Pb > Cu Cd Zn ≥ Ni Co. affinity agrees first stability constant associated hydroxide acetate. properties membranes, their reusability (more than 10 cycles) durability solutions open path removal metals from water also used field analytical chemistry preconcentration and/or separation trace ultratrace ions.