Dye adsorption by sewage sludge-based activated carbons in batch and fixed-bed systems

被引：223
|
作者：
Rozada, F
Calvo, LF
García, AI
Martín-Villacorta, J
Otero, M
机构：
[1] Univ Leon, Nat Resources Inst, IRENA ESTIA, Dept Chem Engn, E-24071 Leon, Spain
[2] Univ Leon, Dept Phys Chem, E-24071 Leon, Spain
来源：
BIORESOURCE TECHNOLOGY | 2003年 / 87卷 / 03期
关键词：
sewage sludge; activated carbons; chemical activation; liquid-phase adsorption; batch; fixed bed;
D O I：
10.1016/S0960-8524(02)00243-2
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
The present research work deals with the production of activated carbons by chemical activation and pyrolysis of sewage sludges. The adsorbent properties of these sewage sludges based activated carbons were studied by liquid-phase adsorption tests. Dyes removal from colored wastewater being a possible application for sludge based adsorbents, methylene blue and saphranine removing from solution was studied. Pure and binary adsorption assays were performed in batch and fixed bed systems. In all cases studied, the adsorbents produced from sewage sludges were able to adsorb both the compounds considered here. Nevertheless, time required for reaching equilibrium, adsorptive capacity and fixed bed characteristic parameters were different for these two compounds. Methylene blue adsorption occurred faster than that of saphranine, and it was preferably adsorbed when treating binary solutions. It could be concluded that the sewage sludge-based activated carbons may be promising for dyes removal from aqueous streams. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：221 / 230
页数：10
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