A new approach for Fe(III)EDTA reduction in NOx scrubber solution using bio-electro reactor

Xu Hong Mi, Lin Gao, Shi Han Zhang, Ling Lin Cai, Wei Li

Research output: Contribution to journalArticlepeer-review


A new process for the removal of NOx by a combined Fe(II)EDTA absorption and microbial reduction has been demonstrated, in which part of the Fe(II)EDTA will be oxidized by oxygen in the flue gas to form Fe(III)EDTA. In former studies, strain FR-2 has been found to reduce Fe(III)EDTA efficiently. Otherwise, it has been reported that bio-electro reactor could efficiently provide a chance for simultaneous denitrification and metal ion removal. Therefore, a use of bio-electro reactor is suggested to promote the reduction of Fe(III)EDTA by strain FR-2 in this paper. The results showed that the concentration of Fe(III)EDTA decreased rapidly when electric current was applied, and that as the current density rose, the Fe(III)EDTA reduction rate increased while followed by a decrease afterward. The formation of the biofilm on the electrode was observed by ESEM (Environmental Scan Electro-Microscope). In addition, the Fe(III)EDTA reduction rate obviously decreased with the existence of NaNO2.

Original languageEnglish (US)
Pages (from-to)2940-2944
Number of pages5
JournalBioresource Technology
Issue number12
StatePublished - Jun 2009
Externally publishedYes


  • Bio-electro reactor
  • NO
  • Reduction

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Renewable Energy, Sustainability and the Environment
  • Waste Management and Disposal

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