Remoção do corante azul de metileno de solução aquosa por adsorção por fibras de coco

Abstract

Water is an essential substance for life and represents a fundamental natural resource for the survival of all organisms. It plays a crucial role in biological processes as well as in industrial and domestic activities, generating effluents that are discharged into the environment or treatment systems. These effluents can contain a wide variety of substances, including organic pollutants, heavy metals, nutrients, and pathogens. Some effluents contain dyes generated in the textile, pharmaceutical, food, and cosmetic industries. Methylene blue is an example of a dye that is a potential generator of impacts on water quality and ecology and is widely used by industries. One way to remove methylene blue from the effluent is through biosorption, which is the adsorption process of living organisms or their products. This study aims to evaluate the removal of methylene blue dye by coconut fibers using concentrations of 0.1 g L-1; 0.2 g L-1; 0.4 g L-1 and 0.6 g L-1, both containing solutions with methylene blue dye and distilled water, to eliminate possible interference of the fibers in the reading. More than 80% of methylene blue was removed from the solution with an adsorption time of 45 minutes, revealing significant correlations between the concentrations of coconut fiber and the removal of this dye.