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dc.contributor.advisorVoelker, Bettina M.
dc.contributor.authorLee, Robert H.
dc.date.accessioned2015-08-27T03:55:25Z
dc.date.accessioned2022-02-03T12:53:25Z
dc.date.available2015-08-27T03:55:25Z
dc.date.available2022-02-03T12:53:25Z
dc.date.issued2015
dc.identifierT 7832
dc.identifier.urihttps://hdl.handle.net/11124/20115
dc.description2015 Fall.
dc.descriptionIncludes illustrations (some color).
dc.descriptionIncludes bibliographical references.
dc.description.abstractManganese is a significant component of natural waters, and is found as Mn(II), (III), and (IV). Mn(III) had long been considered too unstable to be a dissolved species in natural waters, and ligand stabilization is required to prevent it from disproportionating. However, Mn(III) is present under certain conditions in ocean waters. Our work addressed the ability of humic substances to stabilize Mn(III). Mn(II) and (III) concentrations were measured by the modeling of complexation kinetics of both manganese species with the porphyrin ligand α,β,γ,δ-tetrakis(4-carboxyphenyl)porphine (TCPP) to form Mn(III)-TCPP. We found that dissolved Mn(III) was not stabilized in solution by humic substances and that, instead, a colloidal manganese species formed that was reactive with TCPP. In addition, we found that high concentrations of pyrophosphate and citrate interfere with the TCPP method by binding to cadmium, which is required to catalyze the reaction between TCPP and Mn. This was found to slow the rates of complexation of Mn(II) and (III).
dc.format.mediumborn digital
dc.format.mediummasters theses
dc.languageEnglish
dc.language.isoeng
dc.publisherColorado School of Mines. Arthur Lakes Library
dc.relation.ispartof2015 - Mines Theses & Dissertations
dc.rightsCopyright of the original work is retained by the author.
dc.subjectligand
dc.subjectNOM
dc.subjectfulvic
dc.subjectTCPP
dc.subjectmanganese(III)
dc.titleInvestigating the stability of aqueous Mn(III) in the presence of humic substances and measuring manganese speciation with alpha, beta, gamma, delta-tetrakis (4-carboxyphenyl)porphine
dc.typeText
dc.contributor.committeememberVyas, Shubham
dc.contributor.committeememberSpear, John R.
thesis.degree.nameMaster of Science (M.S.)
thesis.degree.levelMasters
thesis.degree.disciplineChemistry and Geochemistry
thesis.degree.grantorColorado School of Mines


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