Isotherms, kinetics and thermodynamics of dye biosorption by anaerobic sludge

Experiments were conducted to investigate the adsorption characteristics of dyes by anaerobic sludge in this study. Influence of dye type, sorption time, initial dye concentration, sludge concentration and temperature on dye biosorption was evaluated. Furthermore, the isotherms, kinetics and thermod...

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Bibliographic Details
Published in:Separation and purification technology 2006-06, Vol.50 (1), p.1-7
Main Authors: Wang, Yi, Mu, Yang, Zhao, Quan-Bao, Yu, Han-Qing
Format: Article
Language:English
Subjects:
Adsorption
Anaerobic sludge
Applied sciences
Biological and medical sciences
Biosorption
Biotechnology
Chemical engineering
Dye
Eosin Y
Exact sciences and technology
Freundlich model
Fundamental and applied biological sciences. Psychology
Kinetics
Langmuir model
Methods. Procedures. Technologies
Others
Rhodamine B
Thermodynamics
Various methods and equipments
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Summary:Experiments were conducted to investigate the adsorption characteristics of dyes by anaerobic sludge in this study. Influence of dye type, sorption time, initial dye concentration, sludge concentration and temperature on dye biosorption was evaluated. Furthermore, the isotherms, kinetics and thermodynamic of biosorption were also explored. Experimental results show that anaerobic sludge had a much higher equilibrium adsorption density on Rhodamine B than on Eosin Y. The adsorption density of Rhodamine B onto sludge decreased with enhancing sludge concentration. At a lower Rhodamine B concentration, adsorption could reach saturation in a lower sludge concentration. Results also indicate that both Langmuir and Freundlich adsorption models were able to adequately describe the biosorption equilibrium of Rhodamine B onto anaerobic sludge. The biosorption followed the pseudo second-order adsorption kinetics.
ISSN:1383-5866
1873-3794
DOI:10.1016/j.seppur.2005.10.012