Adsorption isotherm studies of Methylene blue using activated carbon of waste fruit peel as an adsorbent

The presence of dye materials has a direct effect on water quality and the elimination of such pollutants is of prime importance. In this study, activated carbon was prepared using waste fruit peels (orange), and the experiments were conducted in order to determine the uptake of methylene blue (MB) by the activated carbon of waste fruit peels (orange). Batch adsorption experiments were performed to study the effect of several experimental parameters such as adsorbent dose (0.2, 0.4, 0.6, 0.8, 1.0 g/L), initial MB concentration (100, 200, 300, 400 ppm), temperature (40, 50, 60 degrees C), contact time (10, 20, 30, 40, 50, 60 min.) and pH (3, 5, 7, 9, 11). Maximum adsorption of MB has been obtained at an adsorbent dose of 0.8 g/L, a dye concentration of 100 ppm, temperature of 60 degrees C and a pH of 11. The Langmuir and Freundlich isotherms were used to fit the equilibrium data and the Langmuir isotherm model with 142.86 mg/g at 60 degrees C best described the equilibrium data. Activated carbon made from waste fruit peels (orange) was found to be effective for removing MB from aqueous solutions. According to the findings of this investigation, natural adsorbents such as activated carbon from orange fruit peel powder can be used as an adsorbent material due to its selectivity for the removal of MB from an aqueous solution. Copyright (c) 2022 Elsevier Ltd. All rights reserved. Selection and peer-review under responsibility of the scientific committee of the International Chemical Engineering Conference 2021 (100 Glorious Years of Chemical Engineering & Technology)

Automated summary

The presence of dye materials in water has a significant impact on water quality, making the elimination of such pollutants crucial. This study focused on the use of activated carbon prepared from waste orange peels for the adsorption of methylene blue (MB) from aqueous solutions. The experiments revealed that the activated carbon from waste orange peels was effective in removing MB, with optimal conditions identified as an adsorbent dose of 0.8 g/L, dye concentration of 100 ppm, temperature of 60°C, and pH of 11.