Phenol removal from Iso-octane by Adsorption Technique Using Lepidocrocite: Kinetic and Thermodynamic Study
Volume Title: 1
1گروه فرآیندهای جداسازی، دانشکد مهندسی شیمی، دانشگاه صنعتی امیرکبیر، تهران، ایران
2عضو هیات علمی
3خ حافظ نبش سمیه دانشگاه صنعتی امیرکبیر دانشکده مهندسی معدن
Among several removal methods, adsorption is known as an efficient and low-cost method for phenol removal. In this study, lepidocrocite (γ-FeOOH) was synthesized and used as new adsorbent for phenol removal from iso-octane as model liquid fuel. Specific surface area (BET) analysiswas applied to characterise the adsorbent. Specific surface area of lepidocrocite was about 114 m2.g-1. Langmuir and Freundlich isotherm models were used to analyzied the equilibrium adsorption data. Pseudo-first-order and pseudo-second-order models were used to explain the kinetics of the adsorption process. The equilibrium data were defined well with the Freundlich isotherm and the adsorption kinetic data fitted fine to the pseudo-second-order model. Based on the results, the chemisorption is dominant mechanism in this process and, the maximum adsorption capacity of lepidocrocite was 666 mg.g-1 at 35 °C.