Uso de carvão ativado proveniente da casca de arroz (oryza sativa) para a remoção de azul de metileno.

Abstract

The processing of rice husk to produce activated charcoal provides a solution to two environmental problems: the improper disposal of this residue in the environment, and its use in the wastewater treatment process. The objective of this work was to verify the viability of chemical-activated rice husk coal for methylene blue dye adsorption. Adsorption tests were performed through time isotherms, pH and temperature influence tests for rice husk activated carbon with phosphoric acid, sodium acetate and potassium hydroxide. From the analyzes performed it was possible to observe that the treatment with potassium hydroxide presented behavior similar to the phosphoric acid, while the treatment with acetate showed some instability. Finally, it was verified that the treatment made with hydroxide presented better efficiency when compared to the others, proving that the rice husk coal is an adsorbent of great economic potential.