Comparative adsorption isotherms and modeling of methylene blue onto activated carbons

被引：252

作者：

Belhachemi M. ^{[1
,2
]}

Addoun F. ^{[2
]}

机构：

[1] Laboratoire de fiabilité et structure des materiaux. Faculte de Sciences et Technologie, Université de Bechar

[2] Laboratoire d'étude physico-chimique des matériaux et application a l'environnement, Faculté de Chimie, USTHB, 16111 Bab Ezzouar Alger, El Alia

来源：

Applied Water Science | 2011年 / 1卷 / 3-4期

关键词：

Activated carbon; Equilibrium isotherm; Nonlinear regression; Surface properties;

D O I：

10.1007/s13201-011-0014-1

中图分类号：

学科分类号：

摘要：

The adsorption of methylene blue (MB) on activated carbons prepared from date stones with different degree of activation has been investigated. Equilibrium adsorption data of MB was carried out at 298 K. Four isotherm models (Freundlich, Langmuir, Redlich-Peterson and Sips) were tested for modeling the adsorption isotherms by nonlinear method. The three-parameter equations (Redlich-Peterson and Sips) showed more applicability than the two-parameter equations (Freundlich and Langmuir), which can be explained by the fact that these have three adjustable parameters. The best fit was achieved with the Redlich-Peterson equation according to the high value of correlation coefficient. All the samples were capable of retaining the MB, with the best result being reached by the sample with higher burn-off. Date stones activated carbon showed high adsorption capacity of 460 mg/g, calculated from the Sips isotherm model. © 2011 The Author(s).

引用

页码：111 / 117

页数：6

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