UTILIZAÇÃO DA CASCA DE AIPIM COMO ADSORVENTE NATURAL PARA A REMOÇÃO DE CORANTE TÊXTIL

Abstract

The textile industry has grown a lot over the years and the consumption of the volume of water for dyeing the fibers also, generating a greater amount of effluents that can be contaminated and harmful to the aquatic environment and to humans. Many studies are being done to solve these problems, a very economical and effective alternative is the use of natural adsorbents for adsorption of dyes. The objective of the study was to evaluate the viability of cassava peel as a natural adsorbent for dye removal. This process was simulated using cassava peel as adsorbent, and the effluent was simulated in the laboratory using the reactive dye Bezaktiv Red S-Matrix 150. The adsorption kinetics of cassava peel to the simulated effluent was analyzed. The specific surface area was 1,430 m2 g-1. The zero charge point of the surface of the adsorbent material was pH close to 4.2. The time required to reach removal equilibrium was approximately 250 minutes. Among the kinetic models studied, the best fit was the pseudo-second order. The use of cassava peel proved to be an alternative for removing the dye, in addition to being a low-cost adsorbent.