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dc.contributor.authorHarris, Savannah
dc.date.accessioned2016-02-12T05:30:29Z
dc.date.available2016-02-12T05:30:29Z
dc.date.issued2015-08
dc.identifier.otherharris_savannah_201508_ms
dc.identifier.urihttp://purl.galileo.usg.edu/uga_etd/harris_savannah_201508_ms
dc.identifier.urihttp://hdl.handle.net/10724/34225
dc.description.abstractThe DOE-NNSA Tritium Processing Facility at the Savannah River Site (SRS) releases effluent averaging 31.0 and 20.5 ppb Cu and Zn, respectively, to H-02 constructed wetland for remediation before release to Upper Three Runs Creek to meet compliance with state and federal water quality regulations. Comparison of acid-volatile sulfide (AVS) to organic carbon normalized simultaneously extracted metals (SEM) and SEM to total metals concentrations indicates some Cu and Pb and most Zn accumulating in surface sediments is sequestered in AVS and SEM extractable phases including metal-sulfides and organic carbon complexes. Although biogeochemical changes resulting from batch simulated sediment resuspension triggered release of enough total metals to exceed NPDES permit limits, DGT-bioavailable metals and BLM-generated inorganic dissolved metals data suggest a negligible increase in bioavailable metals, likely due to scavenging of released metals by particulate Fe(OH)3. Better understanding site-specific metal sequestration and (re)mobilization processes can lead to wetland design improvement.
dc.languageeng
dc.publisheruga
dc.rightspublic
dc.subjectacid-volatile sulfide
dc.subjectsimultaneously extracted metals
dc.subjectconstructed wetland
dc.subjectbiogeochemistry
dc.subjectresuspension
dc.subjectcopper, zinc
dc.subjectlead
dc.subjectDGT
dc.titleMetal-sulfide dynamics in a constructed wetland in the southeastern United States
dc.typeThesis
dc.description.degreeMS
dc.description.departmentGeology
dc.description.majorGeology
dc.description.advisorDouglas Crowe
dc.description.committeeDouglas Crowe
dc.description.committeeJohn C. Seaman
dc.description.committeeGary Mills


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