Spectroscopy and Spectral Analysis, Volume. 31, Issue 10, 2819(2011)
Biosorption Properties of Extracellular Polymeric Substances Produced by Sulfate-Reducing Bacteria Towards Cu(Ⅱ) Ion
The purpose of the present study was to investigate the Cu2+ biosorption properties of extracellular polymeric substances (EPS) produced by sulfate-reducing bacteria. The composition and physicochemical characteristics of EPS were determined. The adsorption characteristics of EPS towards Cu2+ were examined using thermodynamic equilibrium equations and determined by FTIR and SEM-EDS. The EPS was shown to have a strong copper-binding capacity and the biosorption data obtained were well described by the Freundlich isotherm model. The results of FTIR spectra and SEM-EDS confirmed the importance of the C—O—C group, —OH group and carbonyl group from polysaccharides and proteins in Cu2+ sorption by EPS. These findings suggest the potential of EPS produced by sulfate-reducing bacteria for the removal of Cu(Ⅱ) ion from aqueous solution.
Get Citation
Copy Citation Text
FANG Di, ZHANG Rui-chang, ZHAO Yang-guo. Biosorption Properties of Extracellular Polymeric Substances Produced by Sulfate-Reducing Bacteria Towards Cu(Ⅱ) Ion[J]. Spectroscopy and Spectral Analysis, 2011, 31(10): 2819
Received: Dec. 8, 2010
Accepted: --
Published Online: Nov. 9, 2011
The Author Email: Di FANG (dfang@ouc.edu.cn)