Scavenging behaviour of meranti sawdust in the removal of methylene blue from aqueous solution

被引：218

作者：

Ahmad, A. ^{[1
]}

Rafatullah, M. ^{[2
]}

Sulaiman, O. ^{[2
]}

Ibrahim, M. H. ^{[1
]}

Hashim, R. ^{[2
]}

机构：

[1] Univ Sains Malaysia, Sch Ind Technol, Environm Technol Div, George Town 11800, Malaysia

[2] Univ Sains Malaysia, Sch Ind Technol, Bioresource Paper & Coatings Technol Div, George Town 11800, Malaysia

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 170卷 / 01期

关键词：

Meranti sawdust; Adsorption; Isotherm; Methylene blue; Kinetic; RESPONSE-SURFACE METHODOLOGY; LOW-COST ADSORBENT; BASIC DYE; ACTIVATED CARBON; AGRICULTURAL WASTE; FLY-ASH; MALACHITE GREEN; WOOD SAWDUST; CATIONIC DYE; REACTIVE DYE;

D O I：

10.1016/j.jhazmat.2009.04.087

中图分类号：

X [环境科学、安全科学];

学科分类号：

083001 [环境科学];

摘要：

Meranti (Philippine mahogany) sawdust, an inexpensive material, showed strong scavenging behaviour through adsorption for the removal of methylene blue (MB) from aqueous solution. Batch studies were performed to evaluate and optimize the effects of various parameters such as contact time, pH, initial dye concentrations and adsorbent dosage. Langmuir, Freundlich and Temkin isotherms were used to analyze the equilibrium data at different temperatures. The experimental data fitted well with the Langmuir adsorption isotherm, indicating thereby the mono layer adsorption of the dye. The monolayer sorption capacity of meranti sawdust for MB was found to be 120.48, 117.64,149.25 and 158.73 mg/g at 30,40,50 and 60 degrees C, respectively. Thermodynamic calculations showed that the MB adsorption process is endothermic and spontaneous in nature. Kinetic studies showed that the adsorption followed a pseudo-second-order kinetic model. The results indicated that the meranti sawdust could be an alternative material in place of more costly adsorbents used for dye removal. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：357 / 365

页数：9

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