| Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NO_x absorption solution |
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| 作者姓名： | 李伟 吴成志 张士汉 施耀 雷乐成 |
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| 作者单位： | Institute of Environmental Engineering，Zhejiang University，Hangzhou 310027，China，Institute of Environmental Engineering，Zhejiang University，Hangzhou 310027，China，Institute of Environmental Engineering，Zhejiang University，Hangzhou 310027，China，Institute of Environmental Engineering，Zhejiang University，Hangzhou 310027，China，Institute of Environmental Engineering，Zhejiang University，Hangzhou 310027，China |
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| 基金项目： | Project (No. 20176052) supported by the National Natural Science Foundation of China and the Scientific Research Foundation for Returned Overseas Chinese Scholars, Ministry of Education |
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| 摘 要： | INTRODUCTION Nitrogen oxides (NOx) are significant airborne contaminants resulting from fossil fuels combustion. The use of metal chelate additives for combined re- moval of NOx and SO2 in FGD (flue-gas desulfuriza- tion) systems was investigated by several groups (Harriott et al., 1993; Tsai et al., 1989; Shi et al., 1996a; 1997). Fe(II)EDTA (EDTA, ethylenediami- netetraacetate) as an additive for removing nitric oxide (NO) from flue gas had been extensively stud- ied, with the …
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Experimental study on the inhibition of biological reduction of Fe(III)EDTA in NO_x absorption solution |
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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 NO_x absorption solution[J].Journal of Zhejiang University Science,2005(10). |
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| Authors: | LI Wei WU Cheng-zhi ZHANG Shi-han SHI Yao LEI Le-cheng |
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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. |
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| Keywords: | Biological reduction Fe(III)EDTA NOx Inhibition |
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