Abstract

This work aims to contribute to the development of new materials for environmental protection. The preparation and characterization of new materials based on magnetic nanoparticles on a dolomite matrix are presented, along with an evaluation of their ability to remove nickel (II) from aqueous solutions. Different systems were prepared: pure dolomite, a mechanical mixture of D with magnetic nanoparticles, and nanoparticles supported on a dolomite matrix. These systems were characterized, revealing different structural properties for the nanoparticles supported on a dolomite matrix system. Tests were performed in batch and in continuous reactors under different operating conditions. These studies demonstrated a higher adsorption capacity for the nanoparticles supported on a dolomite matrix system. A removal of 39.6% was obtained with nanoparticles supported on a dolomite matrix, 17.4% with magnetic nanoparticles and 4.59% with dolomite. Furthermore, in fixed-bed reactors, the nanoparticles supported on a dolomite matrix system showed greater operational stability. These results position the nanoparticles supported on a dolomite matrix system as a viable and safe option for the treatment of industrial effluents.