Reduction of Fe(III) chelated with citrate in an NOx scrubber solution by Enterococcus sp. FR-3
| Autor: | Nan Liu, Jianmeng Chen, Wei Li, Ling-Lin Cai, Jin-Lin Jiang |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Environmental Engineering
Strain (chemistry) Renewable Energy Sustainability and the Environment Chemistry Iron Inorganic chemistry Scrubber Bioengineering General Medicine Enterococcus sp Nitric Oxide Citric Acid Solutions Reduction (complexity) chemistry.chemical_compound Chelation Nitrogen oxide Oxidation-Reduction Waste Management and Disposal Enterococcus NOx Data scrubbing Chelating Agents |
| Zdroj: | Bioresource Technology. 102:3049-3054 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2010.10.036 |
| Popis: | Biological reduction of Fe(III) to Fe(II) is a key step in nitrogen oxide (NOx) removal by the integrated chemical absorption–biological reduction process. NOx removal efficiency strongly depends on the concentration of Fe(II) in the scrubbing liquid. In this study, a newly isolated strain, Enterococcus sp. FR-3, was used to reduce Fe(III) chelated with citrate to Fe(II). Strain FR-3 reduced citrate-chelated Fe(III) with an efficiency of up to 86.9% and an average reduction rate of 0.21 mM h−1. SO 4 2 - was not inhibitory whereas NO 2 - and SO 3 2 - inhibited cell growth and thus affected Fe(III) reduction. Models based on the Logistic equation were used to describe the relationship between growth and Fe(III) reduction. These findings provide some useful data for Fe(III) reduction, scrubber solution regeneration and NOx removal process design. |
| Databáze: | OpenAIRE |
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