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

共 35 条

[21] Activated carbons from waste biomass by sulfuric acid activation and their use on methylene blue adsorption [J].

Karagoez, Selhan ;

Tay, Turgay ;

Ucar, Suat ;

Erdem, Murat .

BIORESOURCE TECHNOLOGY, 2008, 99 (14) :6214-6222

[22] Experimental and kinetic studies on methylene blue adsorption by coir pith carbon [J].

Kavitha, D. ;

Namasivayam, C. .

BIORESOURCE TECHNOLOGY, 2007, 98 (01) :14-21

[23]

Lazaro D.A., 2008, Int. J. Chem. Eng., V1, P289

[24] Preparation of high surface area activated carbons from tobacco stems with K2CO3 activation using microwave radiation [J].

Li, Wei ;

Zhang, Li-bo ;

Peng, Jin-hui ;

Li, Ning ;

Zhu, Xue-yun .

INDUSTRIAL CROPS AND PRODUCTS, 2008, 27 (03) :341-347

[25]

*MAPA, 2009, MIN AGR PEC AB AGR C

[26] Modification of the surface chemistry of active carbons by means of microwave-induced treatments [J].

Menéndez, JA ;

Menéndez, EM ;

Iglesias, MJ ;

García, A ;

Pis, JJ .

CARBON, 1999, 37 (07) :1115-1121

[27] Activated carbons from waste biomass: An alternative use for biodiesel production solid residues [J].

Nunes, Anne A. ;

Franca, Adriana S. ;

Oliveira, Leandro S. .

BIORESOURCE TECHNOLOGY, 2009, 100 (05) :1786-1792

[28] Evaluation of untreated coffee husks as potential biosorbents for treatment of dye contaminated waters [J].

Oliveira, Leandro S. ;

Franca, Adriana S. ;

Alves, Thiago M. ;

Rocha, Sonia D. F. .

JOURNAL OF HAZARDOUS MATERIALS, 2008, 155 (03) :507-512

[29] Coffee oil as a potential feedstock for biodiesel production [J].

Oliveira, Leandro S. ;

Franca, Adriana S. ;

Camargos, Rodrigo R. S. ;

Ferraz, Vany P. .

BIORESOURCE TECHNOLOGY, 2008, 99 (08) :3244-3250

[30] Proximate composition and fatty acids profile of green and roasted defective coffee beans [J].

Oliveira, LS ;

Franca, AS ;

Mendonça, JCF ;

Barros, MC .

LWT-FOOD SCIENCE AND TECHNOLOGY, 2006, 39 (03) :235-239

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