Recuperação do corante antraquinona do efluente têxtil e estudo de sua reutilização no processo industrial

Abstract

At present days, textile industry plays an important rote when it comes to environmental pollution due to discharge of effluents with intense color. Studies indicate that approximately 15% of dyes used in the dyeing processes end up contaminating the environment. These dyes present in textile effluents vary qualitatively and quantitatively, depending on the composition of the textile substrate and the equipment used in the process. Thus, papers published in various countries aim to minimize the impacts caused by this industry. This work characterized the effluent generated in the process of polyester ribbons dyeing, recovered disperse dye anthraquinone by evaporation and studied its reuse in the manufacturing process; significantly reducing the amount of these dyes adhered to the sludge in landfills. It was acquired 4.64 g of recovered solid per liter of effluent, through the evaporation process at of 80 ºC, and recovered material was used on new dyeing process, with satisfactory results in their ability to dye and color fastness.