Equilibrium, kinetics and thermodynamic of Remazol Brilliant Orange 3R dye adsorption on coffee husk-based activated carbon

被引：224

作者：

Ahmad, Mohd Azmier ^{[1
]}

Rahman, Nazira Khabibor ^{[1
]}

机构：

[1] Univ Sains Malaysia, Sch Chem Engn, Nibong Tebal 14300, Penang, Malaysia

来源：

CHEMICAL ENGINEERING JOURNAL | 2011年 / 170卷 / 01期

关键词：

Activated carbon; Coffee husk; Remazol Brilliant Orange 3R; Adsorption isotherm; Kinetics; Thermodynamic; WASTE-WATER; REMOVAL; SORPTION;

D O I：

10.1016/j.cej.2011.03.045

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this work, coffee husk based activated carbon (CHAC) was prepared by physicochemical activation for the removal of Remazol Brilliant Orange 3R (RBO3R) dye from aqueous solution. The effects of dye initial concentration, contact time, solution temperature and pH on RBO3R adsorption were investigated. Result showed that the adsorption of RBO3R was favorable at acidic pH. The adsorption uptake was found to increase with increase in initial RBO3R concentration, contact time and solution temperature. Langmuir isotherm model fitted well the adsorption equilibrium data with monolayer saturation capacity of 66.76 mg/g at 303 K. The adsorption kinetic was found to follow the pseudo-second-order kinetic model. Boyd plot indicated that the adsorption of RBO3R on CHAC was controlled by film diffusion. The adsorption process was found to be endothermic with the reaction mechanism follows a physisorption process. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：154 / 161

页数：8

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