Sorption of Yttrium and the Rare Earth Elements on the Marine Macroalga Ulva lactuca

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dc.contributor.advisorSchijf, Johanen_US
dc.contributor.authorZoll, Alison M.en_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.accessioned2011-07-07T05:53:57Z
dc.date.available2011-07-07T05:53:57Z
dc.date.issued2011en_US
dc.description.abstractTrace metal interactions with organic matter are relatively poorly understood, though organic matter is ubiquitous in aquatic environments and likely instrumental in controlling metal geochemistry. To better understand the mechanisms underlying metal interactions with organic substrates, sorption of Yttrium and the Rare Earth Elements (YREEs) on Ulva lactuca, a marine macroalga, was studied in batch laboratory experiments at different ionic strengths over a large pH range (2.7 - 8.5). At all ionic strengths and experimental pH values, colloid-bound YREEs make up a substantial portion of sorbed metals as described by a two-site Langmuir model, which has implications for bioremediation and metal sorption studies. YREE sorption on U. lactuca can be modeled as a function of pH with a three-site non-electrostatic surface complexation model, and patterns of conditional YREE complexation constants were used to determine possible identities of metal-complexing functional groups.en_US
dc.identifier.urihttp://hdl.handle.net/1903/11738
dc.subject.pqcontrolledGeochemistryen_US
dc.subject.pqcontrolledChemical Oceanographyen_US
dc.subject.pqcontrolledEnvironmental Sciencesen_US
dc.subject.pquncontrolledcolloidsen_US
dc.subject.pquncontrolledlanthanidesen_US
dc.subject.pquncontrolledmacroalgaeen_US
dc.subject.pquncontrolledorganic matteren_US
dc.subject.pquncontrolledsurface complexation modelen_US
dc.subject.pquncontrolledtrace metal sorptionen_US
dc.titleSorption of Yttrium and the Rare Earth Elements on the Marine Macroalga Ulva lactucaen_US
dc.typeThesisen_US

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