title: A membrane-free baffled microbial fuel cell for cathodic reduction of Cu(II) with electricity generation.
abstract: A membrane-free baffled microbial fuel cell (MFC) was developed to treat synthetic Cu(II) sulfate containing wastewater in cathode chamber and synthetic glucose-containing wastewater fed to anode chamber. Maximum power density of 314 mW/m(3) with columbic efficiency of 5.3% was obtained using initial Cu(2+) concentration of 6400 mg/L. Higher current density favored the cathodic reduction of Cu(2+), and removal of Cu(2+) by 70% was observed within 144 h using initial concentration of 500 mg/L. Powder X-ray diffraction (XRD) analysis indicated that the Cu(2+) was reduced to Cu(2)O or Cu(2)O plus Cu which deposited on the cathode, and the deficient cathodic reducibility resulted in the formation of Cu(4)(OH)(6)SO(4) at high initial Cu(2+) concentration (500-6400 mg/L). This study suggested a novel low-cost approach to remove and recover Cu(II) from Cu(2+)-containing wastewater using MFC-type reactor.
authors.affiliation: Key Laboratory for Urban Habitat Environmental Science and Technology, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China. taohc@pkusz.edu.cn
authors.forename: Hu-Chun
authors.initials: HC
authors.lastname: Tao
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.forename: Min
authors.initials: M
authors.lastname: Liang
authors.forename: Nan
authors.initials: N
authors.lastname: Xu
authors.forename: Jin-Ren
authors.initials: JR
authors.lastname: Ni
authors.forename: Wei-Min
authors.initials: WM
authors.lastname: Wu
mesh_terms: D001674:Bioelectric Energy Sources; D019327:Copper Sulfate / Q000737:chemistry / Q000302:isolation & purification*; D004566:Electrodes; D005947:Glucose; D014865:Waste Disposal, Fluid / Q000379:methods*; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*; D014961:X-Ray Diffraction
chemical_list: D014874:Water Pollutants, Chemical; D005947:Glucose; D019327:Copper Sulfate