our results show that the presence of AB25 significantly favors the removal of heavy
metal ions and may increase the adsorption capacities up to six times with respect to the results obtained using the mono-cationic metallic systems.These results are significant from a practical point of view because of the presence of this dye may significantly improve the removal of heavy metals and, as a consequence, the application of specific treatment methods to reduce the content of metallic species in wastewaters can be avoided if AB25 is present.