The treatment of wastewater containing cadmium is of great interest because of its persistence in the environment and the serious diseases that it can cause to humans. In the present work, the magnetic composite Mn3O4/Fe3O4was used as adsorbent of cadmium ion in aqueous medium. The adsorbent material was synthesized and characterized according to the XRD, Raman, TEM and N2adsorption (BET) techniques. Emphasis was given to the quantification of the phases of the composite by XRD analysis combined with the Rietveld method. The adsorption study was carried out varying the aqueous medium pH and the concentration of cadmium ions in solution. The results show that the cadmium removal by the Mn3O4/Fe3O4magnetic composite in aqueous medium is pH-dependent duplicating as the pH varies from 3 to 7. The study of immobilization of the contaminant in solution showed significant amounts of adsorption, 12.3 mgCd/g at pH 6 and 13.6 mgCd/g at pH 7 indicating a removal of up to 98% for low ion concentrations, suggesting that the adsorbent has a high potential for removing Cd(II) in aqueous medium.
adsorption; magnetic composite; cadmium
