Abstract

SANTOS, M. L. G. et al. Adsorption of Congo red textile dye on pineapple activated charcoal. J. appl. res. technol [online]. 2025, vol.23, n.1, pp.22-32.  Epub Aug 22, 2025. ISSN 2448-6736.  https://doi.org/10.22201/icat.24486736e.2025.23.1.2483.

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%, volatile matter 80.74%, ash 6.33%, fixed carbon 5.9%, carbon 43.43%, hydrogen 1.16%, oxygen 48.19%, nitrogen 6.22%. The CACCA yield was 25.24%. CACCA was used in the adsorption process to remove the anionic Congo red dye, using a Plackett-Burman (PB) experimental design. The formation of a mesoporous structure of the activated charcoal and pHpcz of the CACCA favored the adsorption process, which reached up to 94.94% efficiency in the dye removal.

Keywords : Pineapple; pyrolysis; charcoal; adsorption; Plackett-Burman.

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