Sorption dynamics and isotherm studies of methylene blue uptake on to palm kernel fibre

ASIA unversity > 醫學暨健康學院 > 生物科技學系 > 期刊論文 > Item 310904400/6303

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題名:	Sorption dynamics and isotherm studies of methylene blue uptake on to palm kernel fibre
作者:	Ofomaja, A.E.
貢獻者:	Department of Biotechnology
關鍵詞:	Palm kernel fibre;Solution temperature;Pseudo-second-order;Langmuir isotherm;Methylene blue
日期:	2007
上傳時間:	2009-12-15 05:25:11 (UTC+0)
出版者:	Asia University
摘要:	The effect of temperature on the sorption of methylene blue from aqueous solution onto palm kernel fibre has been studied. Batch kinetics and isotherm studies were performed at temperatures ranging from 299 to 339 K. The kinetic data were studied in terms of the pseudo-first-order and pseudo-second-order kinetic models and the Bangham and intraparticle diffusion models. The pseudo-second-order model best described the sorption process and was employed in predicting the rate constant, equilibrium sorption capacity and the initial sorption rate with effect of temperature. In addition activation energy of sorption has also been determined based on the pseudo-second-order rate constant. The isotherm data was analyzed by the Langmuir and Freundlich isotherms. Palm kernel fibre was found to have a Langmuir monolayer capacity of 233.41 mg g?1 at 299 K. The adsorption is endothermic at ambient temperature and the computation of the thermodynamic parameters, H?, S? and G? indicates that the sorption was favourable at all temperatures.
關聯:	Chemical Engineering Journal 126(1): 35-43
顯示於類別:	[生物科技學系] 期刊論文

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