Síntese e caracterização de particulado magnético de Fe3O4: investigação da interação com o glifosato

Abstract

The use of nanoparticle technology has been progressively used to remove contaminants from the aquatic matrix. Thus, the objective of this work was to synthesize, characterize and investigate the interaction of a mixed iron oxide II and III (nano)structured - Fe3O4 - magnetite with Glyphosate (C3H8NO5P). The methodology used to obtain the material (nano)particulate of magnetite was the technique of coprecipitation of ferrous Fe2+ and ferric Fe3+ with hydroxide ions in aqueous medium. The characterization of the material formed was carried out by spectroscopic absorption techniques in ultraviolet-visible (UV-Vis) and infrared (IR), by X-ray diffraction (XRD) and by scanning electron microscopy (SEM). Considering the world pandemic of Covid-19 that we are experiencing at the moment, the interaction analysis of magnetite-glyphosate was not performed, since the use of the university's laboratories was restricted and locomotion to the laboratories was also achieved. To adapt the study routes, part of the research was carried out in a theoretical way, investigating works published on Google Scholar platforms SciElo and Periódicos Capes, in order to present the application of NPM’s, as well as to present some materials that are being analyzed in the interaction with magnetite. From the techniques of morphological and structural characterization it was possible to observe the presence of internal crystallites with an average diameter around 30 nm. The material presented a varied granulometry, with the presence of impurities from counter ions that were not completely removed in coprecipitation and washes procedures. No research records were found in the literature that analyze the direct interaction of magnetite and glyphosate. The publications that include NPM’s present the use of these in the removal of contaminants such as heavy metals, drugs and dyes present in wastewater.