Microwave assisted thermal treatment of defective coffee beans press cake for the production of adsorbents

被引：69

作者：

Franca, Adriana S. ^{[1
,2
]}

Oliveira, Leandro S. ^{[1
,2
]}

Nunes, Anne A. ^{[3
]}

Alves, Cibele C. O. ^{[2
]}

机构：

[1] Univ Fed Minas Gerais, Dept Engn Mecan, BR-31270901 Belo Horizonte, MG, Brazil

[2] Univ Fed Minas Gerais, Programa Posgrad Ciencia Alimentos, BR-31270901 Belo Horizonte, MG, Brazil

[3] Vilma Alimentos, BR-32210050 Contagem, MG, Brazil

来源：

BIORESOURCE TECHNOLOGY | 2010年 / 101卷 / 03期

关键词：

Adsorption; Microwave activation; Agri-food waste; Toxic pollutants; GRANULAR ACTIVATED CARBON; METHYLENE-BLUE ADSORPTION; AQUEOUS-SOLUTION; WASTE BIOMASS; BIODIESEL PRODUCTION; SURFACE-CHEMISTRY; REMOVAL; MODELS; DYES; RESIDUES;

D O I：

10.1016/j.biortech.2009.08.102

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

Defective coffee press cake, a residue from coffee oil biodiesel production, was evaluated as an adsorbent for removal of basic dyes (methylene blue - MB) from aqueous solutions. The adsorbent was prepared by microwave treatment, providing a significant reduction in processing time coupled to an increase in adsorption capacity in comparison to conventional carbonization in a muffle furnace, Batch adsorption tests were performed at 25 degrees C and the effects of particle size, contact time, adsorbent dosage and initial solution pH were investigated. Adsorption kinetics was better described by a second-order model. The experimental adsorption equilibrium data were fitted to Langmuir, Freundlich and Tempkin adsorption models, with Langmuir providing the best fit. The results presented in this study show that microwave activation presents great potential as an alternative method in the production of adsorbents. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1068 / 1074

页数：7

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