title: Characteristics and Kinetic Analysis of AQS Transformation and Microbial Goethite Reduction:Insight into "Redox mediator-Microbe-Iron oxide" Interaction Process.
abstract: The characteristics and kinetics of redox transformation of a redox mediator, anthraquinone-2-sulfonate (AQS), during microbial goethite reduction by Shewanella decolorationis S12, a dissimilatory iron reduction bacterium (DIRB), were investigated to provide insights into "redox mediator-iron oxide" interaction in the presence of DIRB. Two pre-incubation reaction systems of the "strain S12- goethite" and the "strain S12-AQS" were used to investigate the dynamics of goethite reduction and AQS redox transformation. Results show that the concentrations of goethite and redox mediator, and the inoculation cell density all affect the characteristics of microbial goethite reduction, kinetic transformation between oxidized and reduced species of the redox mediator. Both abiotic and biotic reactions and their coupling regulate the kinetic process for "Quinone-Iron" interaction in the presence of DIRB. Our results provide some new insights into the characteristics and mechanisms of interaction among "quinone-DIRB- goethite" under biotic/abiotic driven.
authors.affiliation: Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Weihuang
authors.initials: W
authors.lastname: Zhu
authors.affiliation: Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Mengran
authors.initials: M
authors.lastname: Shi
authors.affiliation: Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Dan
authors.initials: D
authors.lastname: Yu
authors.affiliation: Pacific Northwest National Laboratory, Richland, Washington 99352, United States.
authors.forename: Chongxuan
authors.initials: C
authors.lastname: Liu
authors.affiliation: Key Laboratory of Northwest Water Resources, Environment and Ecology, Ministry of Education, Xi'an University of Architecture and Technology, Xi'an 710055, China.
authors.forename: Tinglin
authors.initials: T
authors.lastname: Huang
authors.affiliation: State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
authors.forename: Fengchang
authors.initials: F
authors.lastname: Wu
mesh_terms: D000465:Algorithms; D000880:Anthraquinones / Q000737:chemistry / Q000378:metabolism*; D016227:Benzoquinones / Q000737:chemistry / Q000378:metabolism; D001673:Biodegradation, Environmental; D001711:Biotransformation; D005290:Ferric Compounds / Q000737:chemistry / Q000378:metabolism*; D058085:Iron Compounds / Q000737:chemistry / Q000378:metabolism*; D007700:Kinetics; D064347:Microscopy, Electrochemical, Scanning; D008903:Minerals / Q000737:chemistry / Q000378:metabolism*; D008956:Models, Chemical; D010084:Oxidation-Reduction; D020614:Shewanella putrefaciens / Q000378:metabolism*; D013053:Spectrophotometry; D014961:X-Ray Diffraction
chemical_list: D000880:Anthraquinones; D016227:Benzoquinones; D005290:Ferric Compounds; D058085:Iron Compounds; D008903:Minerals; C094886:goethite; C000499:ferric oxide; C023554:anthraquinone sulfonate; C004532:quinone