Adsorption of Methylene Blue onto activated carbon produced from steam activated bituminous coal: A study of equilibrium adsorption isotherm

被引：463

作者：

El Qada, Emad N. ^{[1
]}

Allen, Stephen J. ^{[1
]}

Walker, Gavin M. ^{[1
]}

机构：

[1] Queens Univ Belfast, Sch Chem & Chem Engn, Belfast BT9 5AG, Antrim, North Ireland

来源：

CHEMICAL ENGINEERING JOURNAL | 2006年 / 124卷 / 1-3期

关键词：

activated carbon; bituminous coal; steam activation; methylene blue; adsorption; equilibrium isotherm;

D O I：

10.1016/j.cej.2006.08.015

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Equilibrium adsorption isotherm for the removal of basic dye (Methylene Blue) from aqueous solution using bituminous coal-based activated carbon has been investigated. Liquid phase adsorption experiments were conducted and the maximum adsorptive capacity was determined. The effect of experimental parameters, namely, pH and adsorbent particle size were studied. Equilibrium data were mathematically modelled using the Langmuir, Freundlich and Redlich-Peterson adsorption models to describe the equilibrium isotherms at different solution pH values and particle sizes, and isotherm constants were determined. The results indicate the potential use of the adsorbent for the removal of Methylene Blue (MB) from aqueous solution. Maximum adsorption capacity of 580 mg/g at equilibrium was achieved. It was found that pH plays a major role in the adsorption process. The optimum pH for the removal of MB from aqueous solution under the experimental conditions used in this work was 11. The Redlich-Peterson isotherm was found to best fit the experimental data over the whole concentration range as indicating from the high values of the correlation coefficients (r(2) > 0.99). (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：103 / 110

页数：8

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