Biodecolorization of Naphthol Green B dye by Shewanella oneidensis MR-1 under anaerobic conditions.
Biodecolorization of Naphthol Green B dye by Shewanella oneidensis MR-1 under anaerobic conditions.
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DOI：
10.1016/j.biortech.2012.01.099
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发表时间：
2012-04
影响因子：
11.4
通讯作者：
Xiang Xiao;Can-can Xu;Yongmin Wu;Peijie Cai;Wen‐Wei Li;D. Du;Hanqing Yu
中科院分区：
文献类型：
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作者：
Xiang Xiao;Can-can Xu;Yongmin Wu;Peijie Cai;Wen‐Wei Li;D. Du;Hanqing Yu
研究了一株金属还原菌Shewanella oneidensis MR-1对金属络合染料萘绿色B（NGB）的厌氧脱色。S.在厌氧条件下，oneidensis MR-1对浓度高达1000 mg/L的NGB具有很强的脱色能力。在pH8.0和40°C时脱色率最高。氧化铁的加入对NGB的脱色没有抑制作用，而柠檬酸铁、亚硝酸铁或硝酸铁的存在几乎完全终止了NGB的脱色。当加入硫代硫酸盐时，观察到纳米材料的生物合成与NGB的降解相结合。Mtr呼吸途径是S. oneidensis中，胞外电子穿梭也对脱色起着积极的促进作用。
The anaerobic decolorization of metal-complex dye Naphthol Green B (NGB) by a metal-reducing bacterium, Shewanella oneidensis MR-1, was investigated. S. oneidensis MR-1 showed a high capacity for decolorizing NGB even at a concentration of up to 1000mg/L under anaerobic conditions. Maximum decolorization efficiency was appeared at pH 8.0 and 40°C. Addition of iron oxide caused no inhibition to the NGB decolorization, while the presence of ferric citrate, nitrite, or nitrate almost completely terminated the decolorization. Biosynthesis of nanomaterials was observed coupled with the degradation of NGB when thiosulfate was added. The Mtr respiratory pathway was found to be responsible for the decolorization of NGB by S. oneidensis, in which extracellular electron shuttle also plays a positive role in promoting the decolorization.