Fig. 4From: Modification of pomegranate waste with iron ions a green composite for removal of Pb from aqueous solution: equilibrium, thermodynamic and kinetic studiesThe effect of initial concentration on adsorption capacity. The change of adsorption capacity in removal of Pb2+ vs initial concentration of Pb2+ for Fe2+-PPC is depicted in red and for Fe3+-PPC is depicted in blueBack to article page