Adsorption of Eriochrome Black T (EBT) dye using activated carbon prepared from waste rice hulls-Optimization, isotherm and kinetic studies

doi:10.1016/j.jtice.2013.01.010

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標題:	Adsorption of Eriochrome Black T (EBT) dye using activated carbon prepared from waste rice hulls-Optimization, isotherm and kinetic studies
作者:	de Luna, Mark Daniel G. Flores, Edgar D. Genuino, Divine Angela D. Futalan, Cybelle M. Wan, Meng-Wei
貢獻者:	環境工程與科學系
關鍵字:	Activated Carbon Azo Dye Box-Behnken Isotherm Rice Hull
日期:	2013-07
上傳時間:	2014-05-26 10:42:55 (UTC+8)
出版者:	Elsevier Science Bv
摘要:	In this study, the adsorptive removal of Eriochrome Black T (EBT) from aqueous solution using rice hull-based activated carbon was investigated. The effects of initial dye concentration, adsorbent dose and pH on the percent removal of EBT were examined. An increase in adsorbent dose, and decrease in initial dye concentration and pH would cause an increase in the removal of EBT. Using the Box-Behnken design, the optimum conditions were obtained to be the following: 95 ppm initial dye concentration, 2.0 g adsorbent dose and pH of 2. The equilibrium data was evaluated using Langmuir, Freundlich, Temkin and Dubinin-Radushkevich isotherm. The Freundlich model best describes the uptake of EBT dye, which implies that the adsorption of EBT dye onto rice hull activated carbon is heterogeneous. The kinetic data were analyzed using pseudo-first order, pseudo-second order and intraparticle diffusion equation. The pseudo-second order exhibited the best fit for the kinetic studies (R-2 = 0.9996), which indicates that adsorption of EBT is limited by chemisorption process. The intraparticle diffusion model exhibited a linear relationship (R-2 = 0.9921), which shows that pore diffusion is also a limiting step in the overall adsorption process. (C) 2013 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
關聯:	Journal of the Taiwan Institute of Chemical Engineers v.44 n.4 pp.646-653
显示于类别:	[環境工程與科學系(所)] 期刊論文

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