title: Screening, identification, and removal dynamics of a novel iron-manganese removal strain.
abstract: In order to investigate biological properties of the dominant strain from the biological activated carbon (BAC) filter column, a novel, dominant iron-and-manganese removal strain, FM-2, was screened from BAC mature biological membrane. By phylogenetic analysis based on 16S rDNA sequence comparison, FM-2 was identified to be Citrobacter freundii. The experimental results indicated that Citrobacter sp. FM-2 could remove 83.6% Fe (II) and 64.9% Mn (II) after four days. Inoculum greatly influenced the iron-manganese removal performances. The appropriate inoculum concentration was 5%. The initial concentrations of Fe (II) and Mn (II) had little negative influence on its removal performance. When Fe (II) and Mn (II) concentrations were 32.9~85.7 and 25.7~46.7 mg/L, respectively, the removal of Fe (II) and Mn (II) followed the first-order dynamical model with the velocity constants of 0.8528~0.9937/d and 0.3001~0.3179/d, respectively.
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Wenwei
authors.initials: W
authors.lastname: Tang
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Lujun
authors.initials: L
authors.lastname: Wu
authors.affiliation: Department of Chemistry, Tongji University, Shanghai 200092, China.
authors.forename: Jiemin
authors.initials: J
authors.lastname: Gong
authors.affiliation: School of Life Sciences and Technology, Tongji University, Shanghai 200092, China.
authors.forename: Guoqing
authors.initials: G
authors.lastname: Ye
authors.affiliation: School of Life Sciences and Technology, Tongji University, Shanghai 200092, China.
authors.forename: Xinping
authors.initials: X
authors.lastname: Zeng
mesh_terms: D001673:Biodegradation, Environmental; D016971:Citrobacter freundii / Q000145:classification* / Q000302:isolation & purification / Q000378:metabolism*; D007501:Iron / Q000302:isolation & purification / Q000378:metabolism*; D008345:Manganese / Q000302:isolation & purification / Q000378:metabolism*; D008567:Membranes, Artificial; D013045:Species Specificity; D014462:Ultrafiltration / Q000379:methods; D014874:Water Pollutants, Chemical / Q000302:isolation & purification / Q000378:metabolism*; D018508:Water Purification / Q000379:methods*
chemical_list: D008567:Membranes, Artificial; D014874:Water Pollutants, Chemical; D008345:Manganese; D007501:Iron
keywords: Citrobacter sp. FM-2; Iron-manganese removal strain; removal efficiency