Investigation into the Potential Toxicity of Zero-Valent Iron Nanoparticles to a Trichloroethylene-Degrading Groundwater Microbial Community

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dc.contributor.advisorTorrents, Albaen_US
dc.contributor.advisorYarwood, Stephanie Aen_US
dc.contributor.authorZabetakis, Kara Margareten_US
dc.contributor.departmentMarine-Estuarine-Environmental Sciencesen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2013-10-04T05:32:36Z
dc.date.available2013-10-04T05:32:36Z
dc.date.issued2013en_US
dc.description.abstractThe microbiological impact of zero-valent iron remediation of groundwater was investigated by exposing a trichloroethylene-degrading anaerobic microbial community to bare and coated iron nanoparticles. Changes in population numbers and metabolic activity were analyzed using qPCR and were compared to those of a blank, negative, and positive control to assess for microbial toxicity. Additionally, these results were compared to those of samples exposed to an equal concentration of iron filings in an attempt to discern the source of toxicity. Statistical analysis revealed that the three iron treatments were equally toxic to total Bacteria and Archaea populations, as compared with the controls. Therefore, toxicity appears to result either from the release of iron ions and the generation of reactive oxygen species, or from alteration of the redox system and the disruption of microbial metabolisms. There does not appear to be a unique nanoparticle-based toxicity.en_US
dc.identifier.urihttp://hdl.handle.net/1903/14549
dc.subject.pqcontrolledEnvironmental scienceen_US
dc.subject.pqcontrolledMicrobiologyen_US
dc.subject.pqcontrolledNanoscienceen_US
dc.subject.pquncontrolledgroundwateren_US
dc.subject.pquncontrolledironen_US
dc.subject.pquncontrolledmicroorganismsen_US
dc.subject.pquncontrollednanoparticleen_US
dc.subject.pquncontrolledtoxicityen_US
dc.subject.pquncontrolledtrichloroethyleneen_US
dc.titleInvestigation into the Potential Toxicity of Zero-Valent Iron Nanoparticles to a Trichloroethylene-Degrading Groundwater Microbial Communityen_US
dc.typeThesisen_US

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