Light-driven nitrous oxide production via autotrophic denitrification by self-photosensitized Thiobacillus denitrificans

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dc.contributor.authorChen, Manen
dc.contributor.authorZhou, Xiao-Fangen
dc.contributor.authorYu, Yu-Qingen
dc.contributor.authorLiu, Xingen
dc.contributor.authorZeng, Raymond Jian-Xiongen
dc.contributor.authorZhou, Shun-Guien
dc.contributor.authorHe, Zhenen
dc.contributor.departmentCivil and Environmental Engineeringen
dc.date.accessioned2019-08-26T14:19:50Zen
dc.date.available2019-08-26T14:19:50Zen
dc.date.issued2019-06en
dc.description.abstractN2O (Nitrous oxide, a booster oxidant in rockets) has attracted increasing interest as a means of enhancing energy production, and it can be produced by nitrate (NO3-) reduction in NO3--loading wastewater. However, conventional denitrification processes are often limited by the lack of bioavailable electron donors. In this study, we innovatively propose a self-photosensitized nonphototrophic Thiobacillus denitrificans (T. denitrificans-CdS) that is capable of NO(3)(-)reduction and N2O production driven by light. The system converted > 72.1 +/- 1.1% of the NO3--N input to N2O-N, and the ratio of N2O-N in gaseous products was > 96.4 +/- 0.4%. The relative transcript abundance of the genes encoding the denitrifying proteins in T. denitrificans-CdS after irradiation was significantly upregulated. The photoexcited electrons acted as the dominant electron sources for NO(3)(-)reduction by T. denitrificans-CdS. This study provides the first proof of concept for sustainable and low-cost autotrophic denitrification to generate N2O driven by light. The findings also have strong implications for sustainable environmental management because the sunlight-triggered denitrification reaction driven by nonphototrophic microorganisms may widely occur in nature, particularly in a semiconductive mineral-enriched aqueous environment.en
dc.description.notesThis work was supported by the National Natural Science Foundation of China (21607023, 41671264 and 91751109).en
dc.description.sponsorshipNational Natural Science Foundation of China [21607023, 41671264, 91751109]en
dc.format.mimetypeapplication/pdfen
dc.identifier.doihttps://doi.org/10.1016/j.envint.2019.03.045en
dc.identifier.eissn1873-6750en
dc.identifier.issn0160-4120en
dc.identifier.pmid30954721en
dc.identifier.urihttp://hdl.handle.net/10919/93258en
dc.identifier.volume127en
dc.language.isoenen
dc.rightsCreative Commons Attribution-NonCommercial-NoDerivatives 4.0 Internationalen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subjectBiohybrid systemen
dc.subjectAutotrophic denitrificationen
dc.subjectSemiconductorsen
dc.subjectCadmium sulfideen
dc.subjectNitrous oxideen
dc.titleLight-driven nitrous oxide production via autotrophic denitrification by self-photosensitized Thiobacillus denitrificansen
dc.title.serialEnvironment Internationalen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten
dc.type.dcmitypeStillImageen

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