title: Characterization of Pseudomonas stutzeri NT-I capable of removing soluble selenium from the aqueous phase under aerobic conditions.
abstract: Pseudomonas stutzeri strain NT-I was isolated from the drainage wastewater of a selenium refinery plant. This bacterium efficiently reduced selenate to elemental selenium without prolonged accumulation of selenite under aerobic conditions. Strain NT-I was able to reduce selenate completely at high concentrations (up to 10 mM) and selenite almost completely (up to 9 mM). In addition, higher concentrations of selenate and selenite were substantially reduced. Activity was observed under the following experimental conditions: 20-50°C, pH 7-9, and 0.05-20 g L(-1) NaCl for selenate reduction, and 20-50°C, pH 6-9, and 0.05-50 g L(-1) NaCl for selenite reduction. Under anaerobic conditions, selenate was reduced more rapidly, whereas selenite was not reduced at all. The high selenate- and selenite-reducing capability at high concentrations suggested that strain NT-I is suitable for the removal of selenium from high-strength industrial wastewater.
authors.affiliation: Division of Sustainable Energy and Environmental Engineering, Graduate School of Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Kuroda
authors.forename: Emi
authors.initials: E
authors.lastname: Notaguchi
authors.forename: Akiko
authors.initials: A
authors.lastname: Sato
authors.forename: Masaya
authors.initials: M
authors.lastname: Yoshioka
authors.forename: Ai
authors.initials: A
authors.lastname: Hasegawa
authors.forename: Tsubasa
authors.initials: T
authors.lastname: Kagami
authors.forename: Takanobu
authors.initials: T
authors.lastname: Narita
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Yamashita
authors.forename: Kazunari
authors.initials: K
authors.lastname: Sei
authors.forename: Satoshi
authors.initials: S
authors.lastname: Soda
authors.forename: Michihiko
authors.initials: M
authors.lastname: Ike
mesh_terms: D007220:Industrial Waste; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000737:chemistry / Q000378:metabolism; D044223:Pseudomonas stutzeri / Q000145:classification / Q000302:isolation & purification* / Q000378:metabolism*; D012643:Selenium / Q000378:metabolism*; D014871:Water Microbiology
chemical_list: D007220:Industrial Waste; D010088:Oxidoreductases; D012643:Selenium