title: Effect of conductive polymers coated anode on the performance of microbial fuel cells (MFCs) and its biodiversity analysis.
abstract: Conductive polymer, one of the most attractive electrode materials, has been applied to coat anode of MFC to improve its performance recently. In this paper, two conductive polymer materials, polyaniline (PANI) and poly(aniline-co-o-aminophenol) (PAOA) were used to modify carbon felt anode and physical and chemical properties of the modified anodes were studied. The power output and biodiversity of modified anodes, along with unmodified carbon anode were compared in two-chamber MFCs. Results showed that the maximum power density of PANI and PAOA MFC could reach 27.4 mW/m(2) and 23.8 mW/m(2), comparing with unmodified MFC, increased by 35% and 18% separately. Low temperature caused greatly decrease of the maximum voltage by 70% and reduced the sorts of bacteria on anodes in the three MFCs. Anode biofilm analysis showed different bacteria enrichment: a larger mount of bacteria and higher biodiversity were found on the two modified anodes than on the unmodified one. For PANI anode, the two predominant bacteria were phylogenetically closely related to Hippea maritima and an uncultured clone MEC_Bicarb_Ac-008; for PAOA, Clostridiales showed more enrichment. Compare PAOA with PANI, the former introduced phenolic hydroxyl group by copolymerization o-aminophenol with aniline, which led to a different microbial community and the mechanism of group effect was proposed.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210093, Jiangsu, PR China.
authors.forename: Chao
authors.initials: C
authors.lastname: Li
authors.forename: Libin
authors.initials: L
authors.lastname: Zhang
authors.forename: Lili
authors.initials: L
authors.lastname: Ding
authors.forename: Hongqiang
authors.initials: H
authors.lastname: Ren
authors.forename: Hao
authors.initials: H
authors.lastname: Cui
mesh_terms: D000627:Aminophenols; D000814:Aniline Compounds; D044822:Biodiversity; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D004553:Electric Conductivity; D004566:Electrodes; D004579:Electron Transport; D054892:Metagenome; D008855:Microscopy, Electron, Scanning; D015203:Reproducibility of Results; D013696:Temperature
chemical_list: D000627:Aminophenols; D000814:Aniline Compounds; C522165:poly(aniline-co-o-aminophenol); C416807:polyaniline