title: [Biosorption properties of extracellular polymeric substances produced by sulfate-reducing bacteria towards Cu(II) ion].
abstract: 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.
authors.affiliation: Key Laboratory of Marine Environment and Ecology, Ministry of Education, Qingdao 266100, China. dfang@ouc.edu.cn
authors.forename: Di
authors.initials: D
authors.lastname: Fang
authors.forename: Rui-Chang
authors.initials: RC
authors.lastname: Zhang
authors.forename: Yang-Guo
authors.initials: YG
authors.lastname: Zhao
mesh_terms: D000327:Adsorption; D003300:Copper; D011108:Polymers; D016999:Sulfur-Reducing Bacteria / Q000737:chemistry*; D013816:Thermodynamics
chemical_list: D011108:Polymers; D003300:Copper