Biological reduction of nitric oxide (NO), chelated by ferrous L (L: chelate reagent), to N2 is one of the core processes in a chemical absorption–biological reduction integrated technique for nitrogen oxide (NOx) removal from flue gases. In this study, a newly isolated strain, Pseudomonas sp., was used to reduce NO chelated by Fe(II)Cit (Cit: citrate) as Fe(II)Cit-NO, and some factors were investigated. The results showed that, at the NO concentration of 670 mg/m3, 65.9% of NO was totally reduced within 25 h under anaerobic conditions, and the optimal conditions for the bioreduction of NO were found. The strain of Pseudomonas sp. could efficiently use glucose as the carbon source for Fe(II)Cit-NO reduction. Though each complex could be reduced by its own dedicated bacterial strain, Fe(III)Cit could also be reduced by the strain of Pseudomonas sp. The nitrite ion, NO2 −, could inhibit cell growth and thus affect the Fe(III) reduction process. These findings provide some useful data for Fe(II)Cit-NO reduction, scrubber solution regeneration and NO x removal process design.

中文翻译：

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假单胞菌对 Fe(II)Cit-NO 还原的表征和优化。

由亚铁 L（L：螯合剂）螯合的一氧化氮 (NO) 生物还原为 N2，是化学吸收-生物还原综合技术从烟道气中去除氮氧化物 (NOx) 的核心过程之一。在这项研究中，新分离的菌株 Pseudomonas sp. 用于将被 Fe(II)Cit (Cit: citrate) 螯合的 NO 还原为 Fe(II)Cit-NO，并研究了一些因素。结果表明，当NO浓度为670 mg/m3时，厌氧条件下25 h内NO完全还原率为65.9%，找到了生物还原NO的最佳条件。假单胞菌菌株。可以有效地利用葡萄糖作为 Fe(II)Cit-NO 还原的碳源。尽管每个复合物都可以被其自己的专用细菌菌株还原，但 Fe(III)Cit 也可以被假单胞菌菌株还原。亚硝酸根离子 NO2 - 可以抑制细胞生长，从而影响 Fe(III) 的还原过程。这些发现为 Fe(II)Cit-NO 还原、洗涤器溶液再生和 NO x 去除工艺设计提供了一些有用的数据。