title: Dechlorination of 4-chlorophenol to phenol in bioelectrochemical systems.
abstract: Bioelectrochemical systems (BESs), such as microbial fuel cells (MFCs) and microbial electrolysis cells (MECs), are generally regarded as a promising key technology to effectively treat wastewater and better exploit the renewable resource. This study explored the use of a BES to abiotically cathodic dechlorination of aromatic chlorides such as 4-chlorophenol, where the process was driven by microbial oxidation of glucose at the anode. It was confirmed that the 4-CP reduction process was feasible in BES and the dechlorination efficiency of 4-CP could achieve 50.3% at the cathode with energy generation. The 4-CP dechlorination efficiency was significantly enhanced when the BES was supplied with voltages, reaching up to 92.5% at an energy consumption of 0.549 kWh mol(-1) 4-CP (at applied voltage of 0.7 V). Besides, phenol was identified as the major product of 4-CP dechlorination at the cathode of BES in this study, which was the same as electrochemical reduction.
authors.affiliation: College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China. wenqing_hrbeu@yahoo.com.cn
authors.forename: Qing
authors.initials: Q
authors.lastname: Wen
authors.forename: Ting
authors.initials: T
authors.lastname: Yang
authors.forename: Shaoyun
authors.initials: S
authors.lastname: Wang
authors.forename: Ye
authors.initials: Y
authors.lastname: Chen
authors.forename: Lijie
authors.initials: L
authors.lastname: Cong
authors.forename: Yuanjin
authors.initials: Y
authors.lastname: Qu
mesh_terms: D001674:Bioelectric Energy Sources; D002713:Chlorine / Q000737:chemistry; D002733:Chlorophenols / Q000737:chemistry*; D004566:Electrodes; D019800:Phenol / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry*
chemical_list: D002733:Chlorophenols; D014874:Water Pollutants, Chemical; D019800:Phenol; C029107:4-chlorophenol; D002713:Chlorine