title: Adsorption properties and gaseous mercury transformation rate of natural biofilm.
abstract: Biofilms were developed on glass microscope slides in a natural aquatic environment and their mercury adsorption properties were evaluated. Results demonstrated that the biofilms contained a large number of bacterial cells and associated extracellular polymers. Mercury forms detected in the biofilms were mainly bound to residual matter and organic acids. The adsorption processes could be described by a Langmuir isotherm. The optimum conditions for adsorption of mercury to natural biofilm were an ionic strength of 0.1 mol/L, pH 6 and an optimum adsorption time of 40 min. The transformation rate was 0.79 microg gaseous mercury per gram of biofilm.
authors.affiliation: School of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, People's Republic of China. jpcheng@sjtu.edu.cn
authors.forename: Jinping
authors.initials: J
authors.lastname: Cheng
authors.forename: Wenchang
authors.initials: W
authors.lastname: Zhao
authors.forename: Yuanyuan
authors.initials: Y
authors.lastname: Liu
authors.forename: Cheng
authors.initials: C
authors.lastname: Wu
authors.forename: Caie
authors.initials: C
authors.lastname: Liu
authors.forename: Wenhua
authors.initials: W
authors.lastname: Wang
mesh_terms: D000327:Adsorption; D000465:Algorithms; D018441:Biofilms; D005740:Gases; D006863:Hydrogen-Ion Concentration; D008628:Mercury / Q000737:chemistry*; D008670:Metals / Q000737:chemistry; D012996:Solutions; D013816:Thermodynamics
chemical_list: D005740:Gases; D008670:Metals; D012996:Solutions; D008628:Mercury