Equilibrium modeling and kinetic studies on the adsorption of basic dye by a low-cost adsorbent:: Coconut (Cocos nucifera) bunch waste

被引：504

作者：

Hameed, B. H. ^{[1
]}

Mahmoud, D. K. ^{[1
]}

Ahmad, A. L. ^{[1
]}

机构：

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

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 158卷 / 01期

关键词：

coconut bunch waste; methylene blue; adsorption isotherm; equilibrium; kinetics;

D O I：

10.1016/j.jhazmat.2008.01.034

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 paper, the ability of coconut bunch waste (CBW), ail agricultural waste available in large quantity in Malaysia, to remove basic dye (methylene blue) from aqueous solution by adsorption was studied. Batch mode experiments were conducted at 30 degrees C to study the effects of pH and initial concentration of methylene blue (MB). Equilibrium adsorption isotherms and kinetics were investigated. The experimental data were analyzed by the Langmuir, Freundlich and Temkin models of adsorption. The adsorption isotherm data were fitted well to Langmuir isotherm and the monolayer adsorption capacity was found to be 70.92 mg/g, at 30 degrees C. The kinetic data obtained at different concentrations have been analyzed using a pseudo-first-order, pseudo-second-order equation and intraparticle diffusion equation. The experimental data fitted very well the pseudo-second-order kinetic model. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：65 / 72

页数：8

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