Dye adsorption by prehydrolysed beech sawdust in batch and fixed-bed systems

被引：137

作者：

Batzias, F. A. ^{[1
]}

Sidiras, D. K. ^{[1
]}

机构：

[1] Univ Piraeus, Dept Ind Management & Technol, Lab Simulat Ind Proc, GR-18534 Piraeus, Greece

来源：

BIORESOURCE TECHNOLOGY | 2007年 / 98卷 / 06期

关键词：

basic dyes; adsorption; sawdust; wood; prehydrolysis; column;

D O I：

10.1016/j.biortech.2006.05.020

中图分类号：

S2 [农业工程];

学科分类号：

0828 ;

摘要：

The batch and column kinetics of methylene blue and red basic 22 adsorption on mild acid-hydrolysed beech sawdust were investigated, using untreated beech sawdust as control, in order to explore its potential use as a low cost adsorbent for wastewater dye removal. The adsorption capacities, estimated according to Freundlich's model, and the adsorption capacity coefficient values, determined using the Bohart and Adams' bed depth service model, indicated that prehydrolysis enhances the adsorption properties of the original material. This enhancement can possibly be attributed to (a) the removal of the hemicelluloses during sulphuric acid treatment, resulting in the 'opening' of the lignocellulosic matrix's structure and the increasing of the BET surface area and (b) the activation of the material's surface owing to an increase in the number of dye binding sites. (c) 2006 Elsevier Ltd. All rights reserved.

引用

页码：1208 / 1217

页数：10

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