Isolation of manganese-oxidizing bacteria and analysis of Cr(III) oxidation potential in serpentinite soil | Faculty Open Information System

Isolation of manganese-oxidizing bacteria and analysis of Cr(III) oxidation potential in serpentinite soil

in International Symposium (poster paper), 國際研討會(全文海報發表)
標題Isolation of manganese-oxidizing bacteria and analysis of Cr(III) oxidation potential in serpentinite soil
出版類型國際研討會(全文海報發表)
出版年度2012
AuthorsJuei-Yu Chiu, 邱瑞宇
出版日期Sep 19 2012 12:0
會議地點Japan
其他編號0000
中文摘要

Manganese oxides can enhance oxidation of Cr(III) in soil and produce toxic?Cr(VI). It had been reported that Cr(III) oxidation rates by biogenic Mn oxides were several times faster than that by synthetic MnO2 in the?environments. In this study, in addition to isolation of Mn oxidation bacteria from serpentinite soils, Cr(III) oxidation potential in the serpentinitic soils was tested in these soils amended with different media or Mn oxidation bacteria. Cr(VI) was determined by DPC method, while manganese oxides were determined by the LBB method. Three Mn oxidation strains were isolated and they can produce MnO2 in 10 days in the medium containing MnCO3. 4~6 mg/L of Cr(VI) was produced when 10 mg/L of Cr(III) was added into five serpentinite soils, indicating serpentinite soil has potential to oxidize Cr(III) solution. Concentration of Cr(VI) increased in the serpentinite soils but not in sterilized serpentinite soils amended with a medium containing MnCO3. These results showed that Cr(VI) in the soils might be produced by microorganisms. Increasement of Cr(VI) concentration was observed in one serpentinite soil when manganese oxidation bacteria and a Mn(II) containing medium were amended into the soil.?

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