Release Time:2019-03-09  Hits:

Indexed by: Journal Article

Date of Publication: 2013-06-01

Journal: BIORESOURCE TECHNOLOGY

Included Journals: PubMed、EI、SCIE

Volume: 138

Page Number: 339-344

ISSN: 0960-8524

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

Abstract: 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.