| Effect of electrochemical redox reaction on biochemical ammonium oxidation and chemical nitrite oxidation. | |
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MedLine Citation:
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PMID: 20372016 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A modified graphite felt electrode with neutral red (NRelectrode) was shown to catalyze the chemical oxidation of nitrite to nitrate under aerobic conditions. The electrochemically oxidized NR-electrode (EO-NR-electrode) and reduced NR-electrode (ER-NR-electrode) catalyzed the oxidation of 1,094+/-39 mg/l and 382+/-45 mg/l of nitrite, respectively, for 24 h. The electrically uncharged NRelectrode (EU-NR-electrode) catalyzed the oxidation of 345+/-47 mg/l of nitrite for 24 h. The aerobic bacterial community immobilized in the EO-NR-electrode did not oxidize ammonium to nitrite; however, the aerobic bacterial community immobilized in the ER-NR-electrode bioelectrochemically oxidized 1,412+/-39 mg/l of ammonium for 48 h. Meanwhile, the aerobic bacterial community immobilized on the EU-NR-electrode biochemically oxidized 449+/-22 mg/l of ammonium for 48 h. In the continuous culture system, the aerobic bacterial community immobilized on the ER-NR-electrode bioelectrochemically oxidized a minimal 1,337+/-38 mg/l to a maximal 1,480+/-38 mg/l of ammonium to nitrate, and the community immobilized on the EU-NR-electrode biochemically oxidized a minimal 327+/-23 mg/l to a maximal 412+/-26 mg/l of ammonium to nitrate every two days. The bacterial communities cultivated in the ER-NR-electrode and EU-NR-electrode in the continuous culture system were analyzed by TGGE on the 20th and 50th days of incubation. Some ammoniumoxidizing bacteria were enriched on the ER-NR-electrode, but not on the EU-NR-electrode. |
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Authors:
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Bo Young Jeon; Ha Na Seo; Seung Won Kang; Doo Hyun Park |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of microbiology and biotechnology Volume: 20 ISSN: 1017-7825 ISO Abbreviation: J. Microbiol. Biotechnol. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-04-07 Completed Date: 2010-07-27 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9431852 Medline TA: J Microbiol Biotechnol Country: Korea (South) |
Other Details:
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Languages: eng Pagination: 485-93 Citation Subset: IM |
Affiliation:
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Department of Biological Engineering, Seokyeong University, Seoul 136-704, Korea. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Bacteria
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genetics,
metabolism* Bioreactors / microbiology* DNA, Bacterial / chemistry, genetics Electrochemistry / methods Electrodes Electrophoresis, Polyacrylamide Gel Graphite / chemistry Nitrites / chemistry*, metabolism Oxidation-Reduction Polymerase Chain Reaction Quaternary Ammonium Compounds / chemistry*, metabolism RNA, Ribosomal, 16S / chemistry, genetics Waste Disposal, Fluid / methods* Water Pollutants, Chemical / chemistry*, metabolism |
| Chemical | |
Reg. No./Substance:
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0/DNA, Bacterial; 0/Nitrites; 0/Quaternary Ammonium Compounds; 0/RNA, Ribosomal, 16S; 0/Water Pollutants, Chemical; 7782-42-5/Graphite |
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