Preparation, characterization and phenol adsorption capacity of activated carbons from African beech wood sawdust
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_GJESM-2-3_001
تاریخ نمایه سازی: 9 خرداد 1396
Abstract:
In the present study, different activated carbons were prepared from carbonized African beech wood sawdust by potassium hydroxide activation. The activated carbons were characterized by brunauer–emmett–teller, scanning electron microscope, fourier transform infrared spectroscopy, and thermogravimetric analyzer. The phenol adsorption capacity of the prepared carbons was evaluated. The different factors affecting phenol’s removal were studied including: contact time, solution pH and initial phenol concentration. The optimum phenol removal was obtained after a contact time of 300 min. and at an initial phenol solution pH 7. The maximum removal percentages were determined at 5 mg/L initial phenol concentration as 79, 93, 94 and 98% for AC0, AC1, AC2 and AC3; respectively. The adsorption of phenol on African beech sawdust activated carbons was found to follow the Lagergren first order kinetics and the intraparticle diffusion mechanism gave a good fit to the experimental data. The isothermal models applied fitted the experimental data in the order: Langmuir> Dubinin–Radushkevich> Freundlich and Temkin.
Keywords:
Activated carbon , Brunauer–emmett–teller (BET) , Fourier transform infrared spectroscopy (FTIR) , Isothermal modeling , Kinetics surface characteristics , Potassium hydroxide (KOH) , Thermogravimetric analyzer (TGA)
Authors
N.T Abdel-Ghani
Chemistry Department, Faculty of Science, Cairo University, Cairo, Egypt
G.A. El-Chaghaby
Regional Center for Food and Feed, Agricultural Research Center, Giza, Egypt
F.S. Helal
Science and Technology Center of Excellence, Ministry of Military Production, Cairo, Egypt