Abstract
In this work, strontium hexaferrite (SrFe12O19) with partial substitutions of aluminum and calcium (Sr0·67Ca0·33Fe8Al4O19) and hexaferrite with partial substitutions of manganese (SrMnFe11O19) were synthesized by the polymeric complex method (Pechini). The samples were calcined at a temperature of 1000 °C for 4 h. The crystalline phases, structure, and morphology of the samples were determined by X-ray diffraction, scanning electron microscope, and transmission electron microscopy. The magnetic properties were measured at room temperature using a vibrating sample magnetometer with an applied field of up to 20 kOe. The point of zero charge was determined by measuring the zeta potential. Finally, for adsorption experiments, the concentration of Pb (II) in the samples was determined by Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES).The results show that the sample with partial manganese substitutions (SrMnFe11O19) exhibits the highest removal of pollutants (Pb2+) with a maximum adsorption capacity of 24.23 mg/g.
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