Statistical optimization of adsorption processes for removal of2,4-dichlorophenol by activated carbon derivedfrom oil palm empty fruit bunches
Md. Zahangir ALAM , Suleyman A. MUYIBI , Juria TORAMAE
DOI:
Received July 12, 2006,Revised October 11, 2006, Accepted , Available online
Volume 19,2007,Pages 674-677
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The adsorption capacity of activated carbon produced from oil palm empty fruit bunches through removal of 2,4-dichlorophenol from
aqueous solution was carried out in the laboratory. The activated carbon was produced by thermal activation of activation time with 30
min at 800°C. The adsorption process conditions were determined with the statistical optimization followed by central composite
design. A developed polynomial model for operating conditions of adsorption process indicated that the optimum conditions for
maximum adsorption of phenolic compound were: agitation rate of 100 r/min, contact time of 8 h, initial adsorbate concentration
of 250 mg/L and pH 4. Adsorption isotherms were conducted to evaluate biosorption process. Langmuir isotherm was more favorable
(R2=0.93) for removal of 2,4-dichlorophenol by the activated carbon rather than Freundlich isotherm (R2=0.88).
