title: Cooperative cathode electrode and in situ deposited copper for subsequent enhanced Cd(II) removal and hydrogen evolution in bioelectrochemical systems.
abstract: Bioelectrochemical systems (BESs) were first operated in microbial fuel cell mode for recovering Cu(II), and then shifted to microbial electrolysis cells for Cd(II) reduction on the same cathodes of titanium sheet (TS), nickel foam (NF) or carbon cloth (CC). Cu(II) reduction was similar to all materials (4.79-4.88mg/Lh) whereas CC exhibited the best Cd(II) reduction (5.86±0.25mg/Lh) and hydrogen evolution (0.35±0.07m(3)/m(3)d), followed by TS (5.27±0.43mg/Lh and 0.15±0.02m(3)/m(3)d) and NF (4.96±0.48mg/Lh and 0.80±0.07m(3)/m(3)d). These values were higher than no copper controls by factors of 2.0 and 5.0 (TS), 4.2 and 2.0 (NF), and 1.8 and 7.0 (CC). These results demonstrated cooperative cathode electrode and in situ deposited copper for subsequent enhanced Cd(II) reduction and hydrogen production in BESs, providing an alternative approach for efficiently remediating Cu(II) and Cd(II) co-contamination with simultaneous hydrogen production.
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Qiang
authors.initials: Q
authors.lastname: Wang
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China. Electronic address: lipinghuang@dlut.edu.cn.
authors.forename: Liping
authors.initials: L
authors.lastname: Huang
authors.affiliation: College of Chemistry, Dalian University of Technology, Dalian 116024, China.
authors.forename: Yuzhen
authors.initials: Y
authors.lastname: Pan
authors.affiliation: College of Chemistry, Dalian University of Technology, Dalian 116024, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Zhou
authors.affiliation: Key Laboratory of Industrial Ecology and Environmental Engineering, Ministry of Education (MOE), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China.
authors.forename: Xie
authors.initials: X
authors.lastname: Quan
authors.affiliation: Department of Civil and Environmental Engineering, The Pennsylvania State University, University Park, PA 16802, United States.
authors.forename: Bruce E
authors.initials: BE
authors.lastname: Logan
authors.affiliation: College of Chemistry, Dalian University of Technology, Dalian 116024, China.
authors.forename: Hongbo
authors.initials: H
authors.lastname: Chen
mesh_terms: D000838:Anions; D001674:Bioelectric Energy Sources; D002104:Cadmium / Q000737:chemistry*; D002712:Chlorides / Q000737:chemistry; D003300:Copper / Q000737:chemistry*; D004566:Electrodes; D004572:Electrolysis / Q000379:methods*; D006859:Hydrogen / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009532:Nickel; D013431:Sulfates / Q000737:chemistry; D013696:Temperature
chemical_list: D000838:Anions; D002712:Chlorides; D013431:Sulfates; D002104:Cadmium; D003300:Copper; D009532:Nickel; D006859:Hydrogen
keywords: Bioelectrochemical system; Cathode material; Cu(II) and Cd(II) reduction; Microbial electrolysis cell; Microbial fuel cell