title: [Characterization of manganese oxidation by Pseudomonas sp. QJX-1].
abstract: A manganese-oxidizing bacteria (QJX-1) was isolated from the soil of a manganese mine. It was identified as Pseudomonas sp. QJX-1 by 16S rDNA sequencing. Experimental results showed that the Pseudomonas sp. QJX-1 has a multi-copper oxidase gene CumA, which is an essential component for manganese oxidation by Pseudomonas sp. Under the condition of low initial inoculum level (D600, 0.020), 5.05 mg x L(-1 Mn2+ could be oxidized by QJX-1 within 48 h with a conversion rate of as high as 99.4%. In comparison with the eutrophic conditions, the oligotrophic condition dramatically increased the biological manganese oxidation rate. Biofilm formation by employing the quartz sand could further improve the oxidation rate of Mn2+. Based on these results, it is speculated that biological manganese oxidation in underground water treatment is comparatively high.
authors.forename: Na-Na
authors.initials: NN
authors.lastname: Zhou
authors.forename: Yao-Hui
authors.initials: YH
authors.lastname: Bai
authors.forename: Jin-Song
authors.initials: JS
authors.lastname: Liang
authors.forename: Jin-Ming
authors.initials: JM
authors.lastname: Luo
authors.forename: Rui-Ping
authors.initials: RP
authors.lastname: Liu
authors.forename: Cheng-Zhi
authors.initials: CZ
authors.lastname: Hu
authors.forename: Lin-Jiang
authors.initials: LJ
authors.lastname: Yuan
mesh_terms: D018441:Biofilms; D008345:Manganese / Q000378:metabolism*; D010084:Oxidation-Reduction; D010088:Oxidoreductases / Q000378:metabolism; D011549:Pseudomonas / Q000201:enzymology / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
chemical_list: D008345:Manganese; D010088:Oxidoreductases; C024748:copper oxidase