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ZJUS-B
Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology)  2005, Vol. 6 Issue (10): 8-    DOI: 10.1631/jzus.2005.B1005
    
Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NOx absorption solution
LI Wei, WU Cheng-zhi, ZHANG Shi-han, SHI Yao, LEI Le-cheng
Institute of Environmental Engineering, Zhejiang University, Hangzhou 310027, China
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Abstract  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.

Key words： Biological reduction      Fe(III)EDTA      NOx      Inhibition     
Received: 19 July 2005     
CLC:  X172  
  X701  
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LI Wei
WU Cheng-zhi
ZHANG Shi-han
SHI Yao
LEI Le-cheng
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LI Wei, WU Cheng-zhi, ZHANG Shi-han, SHI Yao, LEI Le-cheng. Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NOx absorption solution. Journal of Zhejiang University-SCIENCE B (Biomedicine & Biotechnology), 2005, 6(10): 8-.

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http://www.zjujournals.com/xueshu/zjus-b/10.1631/jzus.2005.B1005     OR     http://www.zjujournals.com/xueshu/zjus-b/Y2005/V6/I10/8

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