Combining nanoscale zero-valent iron with electrokinetic treatment for remediation of chlorinated ethenes and promoting biodegradation: A long-term field study

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dc.contributor.authorCzinnerová, Marie
dc.contributor.authorVoluščuková, Ondřejka
dc.contributor.authorMarková, Kristýna
dc.contributor.authorŠevců, Alena
dc.contributor.authorČerník, Miroslav
dc.contributor.authorNosek, Jaroslav
dc.date.accessioned2020-04-28T14:09:08Z
dc.date.available2020-04-28T14:09:08Z
dc.date.issued2020
dc.description.abstractNanoscale zero-valent iron (nZVI) is recognized as a powerful tool for the remediation of groundwater contaminated by chlorinated ethenes (CEs). This long-term field study explored nZVI-driven degradation of CEs supported by electrokinetic (EK) treatment, which positively affects nZVI longevity and migration, and its impact on indigenous bacteria. In particular, the impact of combined nZVI-EK treatment on organohalide-respiring bacteria, ethenotrophs and methanotrophs (all capable of CE degradation) was assessed using molecular genetic markers detecting Dehalococcoides spp., Desulfitobacterium spp., the reductive dehalogenase genes vcrA and bvcA and ethenotroph and methanotroph functional genes. The remediation treatment resulted in a rapid decrease of the major pollutant cis-1,2-dichloroethene (cDCE) by 75% in the affected area, followed by an increase in CE degradation products methane, ethane and ethene. The newly established geochemical conditions in the treated aquifer not only promoted growth of organohalide-respiring bacteria but also allowed for the concurrent presence of vinyl chloride- and cDCE-oxidizing methanotrophs and (especially) ethenotrophs, which proliferated preferentially in the vicinity of an anode where low levels of oxygen were produced. The nZVI treatment resulted in a temporary negative impact on indigenous bacteria in the application well close to the cathode; but even there, the microbiome was restored within 15 days. The nZVI-EK treatment proved highly effective in reducing CE contamination and creating a suitable environment for subsequent biodegradation by changing groundwater conditions, promoting transport of nutrients and improving CE availability to soil and groundwater bacteria.cs
dc.format.extent9 strancs
dc.identifier.WebofScienceResearcherIDB-4390-2013 Černík, Miroslav
dc.identifier.doi10.1016/j.watres.2020.115692
dc.identifier.orcid0000-0002-0520-3494 Marková, Kristýna
dc.identifier.orcid0000-0001-8772-704X Ševců, Alena
dc.identifier.orcid0000-0002-7554-020X Černík, Miroslav
dc.identifier.urihttps://dspace.tul.cz/handle/15240/154769
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0043135420302281?casa_token=eXHgqzDnBZgAAAAA:knGXyraGdxOtYN0tCHW17N_kiQFfLe5kJEDD74aQyVXgjCCFvbGDoceZP_DFNA_tH-jbk-ss3w
dc.language.isocscs
dc.publisherPERGAMON-ELSEVIER SCIENCE LTD, THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
dc.relation.ispartofWATER RESEARCH
dc.subjectnZVIcs
dc.subjectElectrokinetic treatmentcs
dc.subjectBioremediationcs
dc.subjectOrganohalide-respiring bacteriacs
dc.subjectChlorinated ethenescs
dc.titleCombining nanoscale zero-valent iron with electrokinetic treatment for remediation of chlorinated ethenes and promoting biodegradation: A long-term field studycs
local.access115692
local.identifier.publikace7651
local.relation.volume175
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