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dc.contributor.advisorPeng, Jianen_US
dc.contributor.advisorXiong, Wenhuien_US
dc.creatorHuang, Chaoen_US
dc.date.accessioned2016-01-06T12:00:21Z
dc.date.available2016-01-06T12:00:21Z
dc.date.created2015-10en_US
dc.date.issued2016-01-05en_US
dc.date.submittedOctober 2015en_US
dc.identifier.urihttp://hdl.handle.net/10388/ETD-2015-10-2342en_US
dc.description.abstractPhosphorus release from sediments contributes significantly to high phosphorus level in lake water and provides nutrient support to promote algal growth. To speed up the recovery of eutrophic lakes, it is necessary to limit phosphorus release from sediments. Accurate sedimentary phosphorus fractionation is a strong basis for understanding phosphorus release from sediments. There are several techniques to study sedimentary phosphorus fractionation. Chemical sequential extraction (CSE) techniques are commonly used by industrial practitioners. However, it is doubtful that the P fractionation of the lake sediments studied using the Jensen and Thamdrup (1993) method is reliable. The reason is that the phosphorus fractions do not exactly correspond to the chemically defined compounds in the sequential phosphorus extraction. In order to further understand the Jensen and Thamdrup (1993) method, it is necessary to study P species in the supernatant and residue of each fraction. X-ray absorption near-edge structure (XANES) can provide direct information about the mineral phase of phosphorus in the sediments. Solution phosphorus nuclear magnetic resonance (31P NMR) reveals direct molecular and structural characterization of organic phosphorus in the sediments. This study enhanced the understanding of the Jensen and Thamdrup (1993) chemical sequential extraction method for studying the sedimentary phosphorus fractionation by using solution 31P NMR spectroscopy and phosphorus K-edge XANES spectroscopy. The research using the chemical sequential extraction indicated that inorganic P was dominant in all sediments samples. Also, it suggested that calcium-bound P accounted for the largest proportion of the total P in every sediments sample. The solution 31P NMR spectroscopy clearly identified orthophosphate, phytic acid, pyrophosphate, and polyphosphate in the sediments samples. The P K-edge XANES spectroscopy showed all of the sediments samples contained apatite and phytic acid. In addition, the study using the XANES identified apatite in the residue after the HCl extraction of Blackstrap #6; however it indicated no apatite in the supernatant of HCl fraction of both Blackstrap #3 and Pond #11.en_US
dc.language.isoengen_US
dc.subjectChemical Sequential Extractionen_US
dc.subjectPhosphorusen_US
dc.subjectLake Sedimentsen_US
dc.subject31P NMRen_US
dc.subjectXANESen_US
dc.titleUnderstanding Chemical Sequential Extraction Method by Using Nuclear Magnetic Resonance and X–Ray Absorption Near Edge Spectroscopies for Phosphorus Fractionation of Lake Sedimentsen_US
thesis.degree.departmentCivil and Geological Engineeringen_US
thesis.degree.disciplineCivil Engineeringen_US
thesis.degree.grantorUniversity of Saskatchewanen_US
thesis.degree.levelMastersen_US
thesis.degree.nameMaster of Science (M.Sc.)en_US
dc.type.materialtexten_US
dc.type.genreThesisen_US
dc.contributor.committeeMemberHu, Yongfengen_US
dc.contributor.committeeMemberNemati, Mehdien_US
dc.contributor.committeeMemberBoulfiza, Mohen_US
dc.contributor.committeeMemberWang, Huien_US


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