Elimination d’un polluant organique à partir des déchets industriels

Abstract

This study evaluates the efficiency of activated carbons derived from potato peels (CAEPT) and sweet potato peels (CAEPD) for the removal of two dyes: indigotine (CI), a food-grade dye, and acid violet 43 (AV), commonly found in cosmetic products. Dye concentrations were quantified using UV-Vis spectrophotometry, and the adsorption mechanisms were investigated through kinetic studies and thermodynamic isotherm models. The results demonstrated excellent dye removal performance. For an adsorbent mass of 100 mg, removal efficiencies reached 91.5% for CI and 99.52% for AV using CAEPT, and 84.14% for CI and 99.94% for AV using CAEPD. Adsorption data obtained with adsorbent masses of 50, 75, and 100 mg fit well with the Temkin isotherm model, indicating a favorable adsorption process. Additionally, the adsorption kinetics followed a pseudo-second-order model, suggesting that chemisorption is the rate-limiting step of the process.