Publication Details |
Category | Text Publication |
Reference Category | Journals |
DOI | 10.1016/j.elecom.2014.10.011 |
Title (Primary) | Extracellular electron transfer of biocathodes: Revealing the potentials for nitrate and nitrite reduction of denitrifying microbiomes dominated by Thiobacillus sp. |
Author | Pous, N.; Koch, C.; Colprim, J.; Puig, S.; Harnisch, F.
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Source Titel | Electrochemistry Communications |
Year | 2014 |
Department | UMB |
Volume | 49 |
Page From | 93 |
Page To | 97 |
Language | englisch |
Keywords | Autotrophic biological denitrification; Bioelectrochemical system; Cyclic voltammetry; Microbial electrochemical technology; Nitrate reductase; Nitrogen removal |
UFZ wide themes | RU3; |
Abstract | The use of biocathodes in bioelectrochemical systems (BES) for the removal of nitrate in wastewater has become a vital field of research. However, the elucidation of the underlying extracellular electron transfer (EET) fundamentals of denitrifying biocathodes is still lacking, but required for a deeper BES understanding and engineering. This study reports for the first time on the thermodynamics of microbial cathodes for nitrate and nitrite reductions using microbial microcosms isolated from a running denitrifying BES. Cyclic voltammetry showed that nitrate and nitrite reduction proceed at − 0.30 V, and − 0.70 V vs. Ag/AgCl, respectively, by surface associated EET sites. The biocathodes were predominantly covered by Thiobacillus sp. contributing with a nitrate reductase (narG) to the major function of the microcosms. In conclusion, the EET characteristics of denitrifying biocathodes are demonstrated for the first time. |
Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=15464 |
Pous, N., Koch, C., Colprim, J., Puig, S., Harnisch, F. (2014): Extracellular electron transfer of biocathodes: Revealing the potentials for nitrate and nitrite reduction of denitrifying microbiomes dominated by Thiobacillus sp. Electrochem. Commun. 49 , 93 - 97 10.1016/j.elecom.2014.10.011 |