title: Enhanced phosphorus flux from overlying water to sediment in a bioelectrochemical system.
abstract: This report proposed a novel technique for the regulation of phosphorus flux based on a bioelectrochemical system. In the simulated water system, a simple in situ sediment microbial fuel cell (SMFC) was constructed. SMFC voltage was increased with time until it was 0.23V. The redox potential of the sediment was increased from -220mV to -178mV during the process. Phosphorus concentration in the water system was decreased from 0.1mg/L to 0.01mg/L, compared with 0.09mg/L in the control. The installation of a SMFC produced an external current and internal circuit, which promoted the transfer of phosphate in overlying water to the sediment, enhanced the microbial oxidation of Fe(2+), and increased the formation of stable phosphorus in sediment. In conclusion, phosphorus flux from the overlying water to sediment was enhanced by SMFC, which has the potential to be used for eutrophication control of water bodies.
authors.affiliation: Department of Bioengineering, Qilu University of Technology, Jinan 250353, PR China.
authors.forename: Qinzheng
authors.initials: Q
authors.lastname: Yang
authors.affiliation: Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, PR China. Electronic address: zhaohuazhang@pku.edu.cn.
authors.forename: Huazhang
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, PR China.
authors.forename: Nannan
authors.initials: N
authors.lastname: Zhao
authors.affiliation: Department of Environmental Engineering, Peking University, The Key Laboratory of Water and Sediment Sciences, Ministry of Education, Beijing 100871, PR China.
authors.forename: Jinren
authors.initials: J
authors.lastname: Ni
authors.affiliation: Beijing Municipal Research Institute of Environmental Protection, National Engineering Research Center of Urban Environmental Pollution Control, Beijing 100037, PR China.
authors.forename: Xuejing
authors.initials: X
authors.lastname: Gu
mesh_terms: D000068476:Beijing; D001674:Bioelectric Energy Sources; D005068:Eutrophication; D019015:Geologic Sediments / Q000032:analysis* / Q000737:chemistry; D010084:Oxidation-Reduction; D010758:Phosphorus / Q000032:analysis*; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water; D010758:Phosphorus
keywords: Bioelectrochemical system; Phosphorus flux; Redox potential; Sediment microbial fuel cell