Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NOx absorption solution

Wei Li, Cheng Zhi Wu, Shi Han Zhang, Yao Shi, Le Cheng Lei

Research output: Contribution to journalArticlepeer-review


Scrubbing of NOx from the gas phase with Fe(II)EDTA has been shown to be highly effective. A new biological method can be used to convert NO to N2 and regenerate the chelating agent Fe(II)EDTA for continuous NO absorption. The core of this biological regeneration is how to effectively simultaneous reduce Fe(III)EDTA and Fe(II)EDTA-NO, two mainly products in the ferrous chelate absorption solution. The biological reduction rate of Fe(III)EDTA plays a main role for the NOx removal efficiency. In this paper, a bacterial strain identified as Klebsiella Trevisan sp. was used to demonstrate an inhibition of Fe(III)EDTA reduction in the presence of Fe(II)EDTA-NO. The competitive inhibition experiments indicted that Fe(II)EDTA-NO inhibited not only the growth rate of the iron-reduction bacterial strain but also the Fe(III)EDTA reduction rate. Cell growth rate and Fe(III)EDTA reduction rate decreased with increasing Fe(II)EDTA-NO concentration in the solution.

Original languageEnglish (US)
Pages (from-to)1005-1008
Number of pages4
JournalJournal of Zhejiang University: Science
Volume6 B
Issue number10
StatePublished - Oct 2005
Externally publishedYes


  • Biological reduction
  • Inhibition
  • NO

ASJC Scopus subject areas

  • General Engineering


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