Fe（II）EDTA 在 Fe（II）EDTA-NO还原过程中的作用

文档编号:HG235  文档字数:11759,页数:22

摘要：本文主要研究Fe(II)EDTA 在 Fe(II)EDTA-NO还原过程中的作用，通过对恒温摇床中微生物还原NO络合吸收液的特性的研究，考察了Fe(II)EDTA-NO还原过程中，NO吸收液中可能存在的电子受体，及其对于还原效果的影响。实验结果表明：在Fe(II)EDTA-NO还原过程中，Fe(II)EDTA和葡萄糖都能作为电子受体，Fe(II)EDTA-NO还原速率与葡萄糖的添加量有很大关系，同时Fe(II)EDTA-NO的还原速率随着Fe(II)EDTA浓度的增加有着一定程度的提高。但是，由于葡萄糖作为优先的电子受体，在葡萄糖存在的条件下，少量的Fe(II)EDTA被氧化。当葡萄糖作为电子受体时，细胞浓度并不增长，同时以Fe(II)EDTA作为电子受体时，细胞浓度反而有所下降。
关键词：电子供体；Fe(II)EDTA；Fe(II)EDTA-NO；生物还原

Abstract: By discussing the importance of Fe(II)EDTA in the action of  Fe(II)EDTA -NO microbial reduction, the reduction properties of microorganisms under the conditions of shaking flasks and continuous operation, the isolation of microorganisms and the process of continuously steady removal of NO were investigated. The mechanism of this process was proposed and the effect of electron donor e.g. glucose and Fe(II)EDTA on the reduction of Fe(II)EDTA-NO was investigated. This study showed that reduction of NO in aqueous Fe(II)EDTA solutions was related to the concentration of glucose. The NO reduction rate was effected by the presence of Fe(II)EDTA, it was fast when the glucose was enough. Glucose played an important role during the reduction of Fe(II)EDTA, little Fe(II)EDTA was oxidized while glucose was existed. The concentration of cell increased in the condition of glucose as electron donor, while the Fe(II)EDTA acted as electron donor, it was down.
 Keywords: electron donor; Fe(II)EDTA; Fe(II)EDTA -NO; microbial reduction

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