Adsorption of Congo red textile dye on pineapple activated charcoal

Abstract

The work produced activated carbon (CACCA) from the lignocellulosic biomass of pineapple peel and crown (CCA) by slow pyrolysis in a fixed bed reactor. Activation was carried out by water vapor at a temperature of 700 °C for a period of 30 min.. The objective was to remove the Congo red textile dye from the charcoal obtained. The biomass showed values for density 0.264 g/ mL, moisture 7.03%, volatilematter 80.74%, ash 6.33%, fixedcarbon 5.9%, carbon 43.43%, hydrogen 1.16%, oxygen 48, 19%, nitrogen 6.22%. The CACCA yield was 25.24%. The formation of a mesoporous structure of the activated cavão and pHpcz of the CACCA favored the adsorption process, which reached up to 94.94% efficiency in the removal of the Congo red dye.