期刊
BIORESOURCE TECHNOLOGY
卷 102, 期 2, 页码 805-813出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2010.08.119
关键词
Aerobic granules; Biosorption; Textile dyes; Functional groups; Extracellular polymeric substances
资金
- National Natural Science Foundation of China [50508001, 51078007]
- Academic Human Resources Development in Institutions of Higher Learning under Jurisdiction of Beijing Municipality [PHR20110819]
- Natural Science Foundation of Beijing [8082007]
- Beijing Nova Program [2006A10]
The contributions of loosely bound extracellular polymeric substances (LB-EPS), tightly bound EPS (TB-EPS), residual sludge (the sludge left after EPS extraction) and functional groups such as amine, carboxyl, phosphate and lipid on aerobic granules on biosorption of four different dyes (Reactive Brilliant Blue KN-R (KN-R), Congo Red (CR), Reactive Brilliant Red K-2G (RBR) and Malachite Green (MG)) were investigated. EPS may be responsible for biosorption of cationic dyes. However, residual sludge always made greater contribution than that of EPS. The biosorption mechanisms were dependent on the functional groups on aerobic granules and dyes' chemical structures. The lipid and phosphate groups might be the main binding sites for KN-R biosorption. Amine, carboxyl, phosphate and lipid were all responsible for the binding of CR. The lipid fractions played an important role for RBR biosorption. For MG, the phosphate groups gave the largest contribution. (C) 2010 Elsevier Ltd. All rights reserved.
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