Desenvolvimento de nanocompósito magnético Fe3O4/quitosana e aplicação na remoção do corante reativo laranja 16 em solução aquosa: estudo de modelos de adsorção

Abstract

The processing industry has represented an obstacle to aquatic ecosystems in several regions of the world. In Brazil, the economy depends heavily on the textile sector, and the increase in this industrial activity is associated with major environmental problems, because the effluents generated are loaded with dyes, solvents, salts, detergents, surfactants and other polluting agents, responsible for changes in the quality of waste water. Due to the great concern with water pollution, several physical / chemical methods have been developed with the aim of removing color. Among these methods, adsorption stands out for being a very efficient technique in color removal using activated charcoal as adsorbent. However, due to its high cost it is necessary to study alternative adsorbents that have a good adsorption capacity and a more affordable cost. In this sense, it was motivated to develop a technology for the treatment of textile effluents from the synthesis of the nanocomposite adsorbent based on nanoparticles of Fe3O4 and chitosan and application in the removal of dye Reactive Orange 16 (RO16) in aqueous solution and evaluate the adsorption models. The results indicate great potential of the nanocomposite Fe3O4/Qt as an effective and low-cost technology for the treatment of textile effluents contaminated with Reactive Orange 16 (RO16).