Investigations on nano-iron oxides properties used for different industrial applications

The paper refers at synthesis preparation of some iron oxides useful in different industrial applications, with high capacities of adsorption for different metal ions from wastewaters. The synthesis method was partial reduction coprecipitation for Fe(2)O(4) nanoparticles, followed by aeration of acidified magnetite nanoparticles for obtaining the gamma-Fe(2)O(3) nanoparticles, and also a mechanical alloying in order to obtain a nanoscale compound, copper ferrite (CuFe(2)O(4)). In order to validate the obtained compounds the investigation methods were scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive X-ray spectrometry (EDX) and X-ray diffraction (XRD) techniques. The stability of the nanomaterials, after 24 hours, was tested and measured with atomic absorption spectrometry (AAS).