Characteristics of cationic Red X-GRL biosorption by anaerobic activated sludge

被引：17
|
作者：
Qiu, Bin [1 ]
Cheng, Xiang [1 ]
Sun, Dezhi [1 ]
机构：
[1] Beijing Forestry Univ, Beijing Key Lab Source Control Technol Water Poll, Beijing 100083, Peoples R China
来源：
BIORESOURCE TECHNOLOGY | 2012年 / 113卷
关键词：
Anaerobic activated sludge; Cationic Red; Adsorption; Fractal-like; ADSORPTION CHARACTERISTICS; AQUEOUS-SOLUTION; DYE;
D O I：
10.1016/j.biortech.2011.12.121
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Anaerobic activated sludge (AAS) was employed for the adsorption of cationic Red X-GRL (X-GRL) from aqueous solutions. The X-GRL uptakes decreased with increases in temperature and salinity, while it was improved with increase in pH. The adsorption of X-GRL by AAS had a better agreement with a fractal-like Langmuir isotherm than a typical Langmuir isotherm. The adsorption rate coefficients at different time had a power-law relationship with time. The surface dimension was positively related to the X-GRL uptakes. The X-GRL uptake by the EPS accounted for only similar to 19% of the total adsorption. The X-GRL adsorption was therefore largely attributed to the active groups on the cell wall. FTIR analysis showed that -CH2 and -NH2 groups were not responsible for the adsorption, which indicated chemical adsorption was negligible. (C) 2011 Elsevier Ltd. All rights reserved.
引用
收藏
页码：102 / 105
页数：4
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