期刊
ENVIRONMENTAL TECHNOLOGY
卷 32, 期 16, 页码 1947-1953出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/09593330.2011.559277
关键词
NOx; microbial reduction; Fe(II)Cit-NO; Fe(II)Cit; Pseudomonas sp.
资金
- National High Technology Research and Development Program of China [2006AA06Z345]
- National Natural Science Foundation of China [20676120]
Biological reduction of nitric oxide (NO), chelated by ferrous L (L: chelate reagent), to N-2 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/m(3), 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 NOx removal process design.
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