Estudo da influência do pH e da temperatura na obtenção do óxido de ferro e manganês - MnFe2O4

Abstract

The synthesis of materials using inexpensive reagents and simple procedures have been studied mainly in applying environmental remediation. Combining efficiency in the process of getting to a good removal of pollutants, it is possible the industrial production of these materials is economically viable. The binary oxides generally have these properties and are good sorbents for heavy metals. But for the synthesis requires several steps requiring a large amount of energy, mainly in the calcination process. The present work shows the statistical analysis of the synthesis of iron oxide and manganese by coprecipitation method using pH and temperature as variables. The measures by atomic absorption spectroscopy flame (FAAS) showed that 99% of precursor reagents are in the synthesized material.Statistical analysis showed no significant interactions because the variation of the factors had no influence on the process. In scanning electron micrograph (SEM) there was a similarity in the structure of each of the samples of the experimental design, confirming the good efficiency shown in the statistical study. The energy dispersive spectra (EDS) presented the elements that make up the oxide, confirming the analyzes by FAAS and also the presence of by-products of the synthesis process.