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dc.contributor.authorJiang, Y
dc.contributor.authorZhang, B
dc.contributor.authorHe, C
dc.contributor.authorShi, J
dc.contributor.authorBorthwick, AGL
dc.contributor.authorHuang, X
dc.date.accessioned2021-08-22T16:09:03Z
dc.date.issued2018-09
dc.identifier.issn0043-1354
dc.identifier.issn1879-2448
dc.identifier.urihttp://hdl.handle.net/10026.1/17692
dc.description.abstract

Groundwater co-contaminated by vanadium (V) (V(V)) and nitrate requires efficient remediation to prevent adverse environmental impacts. However, little is known about simultaneous bio-reductions of V(V) and nitrate supported by gaseous electron donors in aquifers. This study is among the first to examine microbial V(V) reduction and denitrification with hydrogen as the sole electron donor. V(V) removal efficiency of 91.0 ± 3.2% was achieved in test bioreactors within 7 d, with synchronous, complete removal of nitrate. V(V) was reduced to V(IV), which precipitated naturally under near-neutral conditions, and nitrate tended to be converted to nitrogen, both of which processes helped to purify the groundwater. Volatile fatty acids (VFAs) were produced from hydrogen oxidation. High-throughput 16S rRNA gene sequencing and metagenomic analyses revealed the evolutionary behavior of microbial communities and functional genes. The genera Dechloromonas and Hydrogenophaga promoted bio-reductions of V(V) and nitrate directly coupled to hydrogen oxidation. Enriched Geobacter and denitrifiers also indicated synergistic mechanism, with VFAs acting as organic carbon sources for heterotrophically functional bacteria while reducing V(V) and nitrate. These findings are likely to be useful in revealing biogeochemical fates of V(V) and nitrate in aquifer and developing technology for removing them simultaneously from groundwater.

dc.format.extent289-296
dc.format.mediumPrint-Electronic
dc.languageen
dc.language.isoeng
dc.publisherElsevier BV
dc.subjectBio-reduction
dc.subjectDenitrification
dc.subjectHydrogen
dc.subjectNitrate
dc.subjectVanadium (V)
dc.subjectBacteria
dc.subjectBioreactors
dc.subjectDenitrification
dc.subjectGroundwater
dc.subjectHydrogen
dc.subjectNitrates
dc.subjectOxidation-Reduction
dc.subjectRNA, Ribosomal, 16S
dc.subjectVanadium
dc.subjectWater Pollutants, Chemical
dc.titleSynchronous microbial vanadium (V) reduction and denitrification in groundwater using hydrogen as the sole electron donor
dc.typejournal-article
dc.typeJournal Article
dc.typeResearch Support, Non-U.S. Gov't
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/29803094
plymouth.volume141
plymouth.publisher-urlhttp://dx.doi.org/10.1016/j.watres.2018.05.033
plymouth.publication-statusPublished
plymouth.journalWater Research
dc.identifier.doi10.1016/j.watres.2018.05.033
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Engineering, Computing and Mathematics
plymouth.organisational-group/Plymouth/Users by role
plymouth.organisational-group/Plymouth/Users by role/Academics
dc.publisher.placeEngland
dcterms.dateAccepted2018-05-18
dc.rights.embargodate9999-12-31
dc.identifier.eissn1879-2448
dc.rights.embargoperiodNot known
rioxxterms.versionofrecord10.1016/j.watres.2018.05.033
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2018-09-15
rioxxterms.typeJournal Article/Review


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