title: Characterization and optimization of Fe(II)Cit-No reduction by Pseudomonas sp.
abstract: 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 NOx removal process design.
authors.affiliation: Department of Environmental Engineering, Zhejiang University (Yuquan Campus), Hangzhou 310027, China.
authors.forename: Nan
authors.initials: N
authors.lastname: Liu
authors.forename: Jin-Lin
authors.initials: JL
authors.lastname: Jiang
authors.forename: Ling-Lin
authors.initials: LL
authors.lastname: Cai
authors.forename: Wei
authors.initials: W
authors.lastname: Li
mesh_terms: D049109:Cell Proliferation; D019343:Citric Acid; D004785:Environmental Pollutants / Q000737:chemistry / Q000378:metabolism*; D005296:Ferrous Compounds / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D009589:Nitrogen Oxides / Q000737:chemistry / Q000378:metabolism*; D011549:Pseudomonas / Q000378:metabolism*; D013696:Temperature
chemical_list: D004785:Environmental Pollutants; D005296:Ferrous Compounds; D009589:Nitrogen Oxides; D019343:Citric Acid; C016600:ferrous citrate