Macauba palm (Acrocomia aculeata) cake from biodiesel processing: An efficient and low cost substrate for the adsorption of dyes

被引：87

作者：

Vieira, Sara S. ^{[1
]}

Magriotis, Zuy M. ^{[1
]}

Santos, Nadiene A. V. ^{[1
]}

Cardoso, Maria das Gracas ^{[1
]}

Saczk, Adelir A. ^{[1
]}

机构：

[1] Univ Fed Lavras, Dept Quim, BR-37200000 Lavras, MG, Brazil

来源：

CHEMICAL ENGINEERING JOURNAL | 2012年 / 183卷

关键词：

Macauba palm cake; Adsorption; Methylene Blue; Congo Red; PINE-FRUIT SHELL; AQUEOUS-SOLUTION; METHYLENE-BLUE; CONGO RED; REMOVAL; EQUILIBRIUM; BIOSORPTION; SORPTION; WASTE; KINETICS;

D O I：

10.1016/j.cej.2011.12.047

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The potential of natural and heat-treated Macauba palm cake as adsorbent for the removal of Methylene Blue (MB) and Congo Red (CR) from solution has been investigated. Equilibrium adsorption was attained in <7 h and the process was favored at pH 5.0 for MB and pH 6.5 for CR with an adsorbent (g):adsorbate (mL) ratio of 1:200 and an initial concentration of adsorbate of 25 mg L-1. The maximum adsorption capacities of the natural and heat-treated materials were, respectively, 25.80 and 32.30 mg g(-1) for MB, and 32.00 and 20.30 mg g(-1) for CR. The isotherm model proposed by Sips represented most adequately the adsorption of MB and CR. The adsorptions of the dyes were best described in terms of a pseudo second-order reaction. Thermodynamic parameters such as Delta H degrees, Delta S degrees and Delta G degrees were calculated. The adsorption process was found to be endothermic and spontaneous. Macauba palm cake is adequate for the removal of waste dye from industrial effluents by virtue of its abundance, low cost and efficiency of adsorption. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：152 / 161

页数：10

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