title: Characterization of microbial fuel cells enriched using Cr(VI)-containing sludge.
abstract: Microbial fuel cells (MFCs) were successfully enriched using sludge contaminated with Cr(VI) and their characteristics were investigated. After enrichment, the charge of the final 10 peaks was 0.51 C +/- 1.16%, and the anodic electrode was found to be covered with a biofilm. The enriched MFCs removed 93% of 5 mg/l Cr(VI) and 61% of 25 mg/l Cr(VI). 16S rDNA DGGE profiles from the anodic electrode indicated that beta-Proteobacteria, Actinobacteria, and Acinetobacter sp. dominated. This study is the first to report that electrochemically active and Cr(VI)-reducing bacteria could be enriched in the anode compartment of MFCs using Cr(VI)-containing sludge and demonstrates the Cr(VI) removal capability of such MFCs.
authors.affiliation: BIO-IT Fusion Technology Research Institute, Pusan National University, Busan 609-735, Korea.
authors.forename: Eun Yeon
authors.initials: EY
authors.lastname: Ryu
authors.forename: Mia
authors.initials: M
authors.lastname: Kim
authors.forename: Sang-Joon
authors.initials: SJ
authors.lastname: Lee
mesh_terms: D001419:Bacteria / Q000145:classification* / Q000302:isolation & purification* / Q000378:metabolism; D044822:Biodiversity; D001674:Bioelectric Energy Sources / Q000382:microbiology*; D018441:Biofilms / Q000254:growth & development; D002857:Chromium / Q000378:metabolism*; D004269:DNA, Bacterial / Q000235:genetics; D004275:DNA, Ribosomal / Q000235:genetics; D058645:Denaturing Gradient Gel Electrophoresis; D004560:Electricity; D004566:Electrodes / Q000382:microbiology; D004785:Environmental Pollutants / Q000378:metabolism*; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012722:Sewage / Q000382:microbiology*
chemical_list: D004269:DNA, Bacterial; D004275:DNA, Ribosomal; D004785:Environmental Pollutants; D012336:RNA, Ribosomal, 16S; D012722:Sewage; D002857:Chromium; C074702:chromium hexavalent ion