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论文类型：期刊论文

发表时间：2013-06-01

发表刊物：BIORESOURCE TECHNOLOGY

收录刊物：SCIE、EI、PubMed

卷号：138

页面范围：339-344

ISSN号：0960-8524

关键字：NOx; Denitrification; NO-dependent Fe(II)EDTA oxidation; Fe oxidation and reduction; Paracoccus versutus

摘要：The nitrate- and Fe(III)-reducing bacterium Paracoccus versutus LYM was characterized in terms of its ability to perform Fe(II)EDTA-NO reduction coupled with Fe(II)EDTA oxidation (NO-dependent Fe(II)EDTA oxidation, NDFO). It experienced a single anaerobic FeEDTA redox cycling through NDFO and dissimilatory Fe(III)EDTA reduction in FeEDTA culture. The increase in the Fe(II)EDTA concentration contributed to the ascending Fe(II)EDTA-NO reduction rate. The amount of glucose controlled the rate and extent of Fe(II) oxidation during NDFO. Without glucose addition, Fe(II)EDTA-NO reduction rate was at a rather slow rate even in presence of relatively sufficient Fe(II)EDTA. Unlike aqueous Fe2+ and solid-phase Fe(II), Fe(II)EDTA could prevent cells from encrustations. These findings suggested the occurrence of NDFO preferred being beneficial via a mixotrophic physiology in the presence of an organic cosubstrate to being out of consideration for metabolic strategy. (C) 2013 Elsevier Ltd. All rights reserved.