Effect of sulfur compounds on biological reduction of nitric oxide in aqueous Fe(II)EDTA2- solutions

Nitric Oxide : Biology and Chemistry
I ManconiPiet N L Lens

Abstract

Biological reduction of nitric oxide (NO) in aqueous solutions of EDTA chelated Fe(II) is one of the main steps in the BioDeNOx process, a novel bioprocess for the removal of nitrogen oxides (NOx) from polluted gas streams. Since NOx contaminated gases usually also contain sulfurous pollutants, the possible interferences of these sulfur compounds with the BioDeNOx process need to be identified. Therefore, the effect of the sulfur compounds Na2SO4, Na2SO3, and H2S on the biological NO reduction in aqueous solutions of Fe(II)EDTA2- (25 mM, pH 7.2, 55 degrees C) was studied in batch experiments. Sulfate and sulfite were found to not affect the reduction rate of Fe(II)EDTA2- complexed NO under the conditions tested. Sulfide, either dosed externally or formed during the batch incubation out of endogenous sulfur sources or the supplied sulfate or sulfite, influences the production and consumption of the intermediate nitrous oxide (N2O) during Fe(II)EDTA2- bound NO reduction. At low concentrations (0.2 g VSS/l) of denitrifying sludge, 0.2 mM free sulfide completely inhibited the nitrosyl-complex reduction. At higher biomass concentrations (1.3-2.3 g VSS/l), sulfide (from 15 microM to 0.8 mM) induced an incomplete NO denitrification wi...Continue Reading

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Citations

Apr 3, 2007·Applied Microbiology and Biotechnology·Siegfried E VlaeminckWilly Verstraete
Jul 24, 2013·Environmental Science & Technology·Qingbin GuoJinping Jia
Nov 3, 2010·Journal of Hazardous Materials·Hai-song ZhuWei-kang Yuan
Apr 27, 2010·Nitric Oxide : Biology and Chemistry·Jan BartacekPiet N L Lens
Jun 17, 2008·Biotechnology and Bioengineering·Peter van der MaasPiet Lens
Jun 13, 2006·Nitric Oxide : Biology and Chemistry·Isabella ManconiPiet Lens
Jan 27, 2015·Applied Microbiology and Biotechnology·B ChandrashekharR A Pandey
May 27, 2016·Environmental Technology·Adam W AugustyniakHidehiro Kumazawa
Aug 24, 2016·Bioprocess and Biosystems Engineering·Jun ChenJianmeng Chen
Jan 13, 2021·Environmental Science & Technology·Li-Kun WangBing-Jie Ni

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