Abstract
Batch studies were used to investigate the adsorption effectiveness of Aegle-marmelos leaves in removing Chromium(VI) metal ions from the aqueous phase. Adsorption was studied using factors such as adsorbent dosage, pH, contact time, metal ion concentration and temperature. At optimum conditions, removal of 86.6% of Cr(VI) at a pH of 2 was attained by the adsorbent. The Langmuir adsorption model fitted best to the experimental isotherm data The kinetics and mechanism of chromium adsorption were accurately explained by the kinetics model of pseudo second order. According to the thermodynamic characteristics such as entropy(ΔS⁰), Gibbs free energy(ΔG⁰) and enthalpy(ΔH⁰) measured at 298, 303 and 308 K, the adsorption process is endothermic and spontaneous. The analysis of the adsorbent's surface morphology and adsorption capability is supported by FTIR, SEM, and EDS technique. All these findings confirm that Aegle-marmelos leaves could be employed as a probable adsorbent for extracting chromium(VI) in an aqueous solution.
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