CEU Electronic Theses and Dissertations, 2009
| Author | Nguyen, Quynh Thu |
|---|---|
| Title | Physical and Chemical Characterisation of Natural Organic Matter in Upland Ombrotrophic Peat by Tangential Flow Ultrafiltration and Pyrolysis - Gas Chromatography - Mass Spectrometry |
| Summary | This study examines the potential of physical (particle size distribution) and chemical characterisation of natural organic matter in natural waters from upland ombrotrophic peat using Tangential Flow Ultrafiltration and Pyrolysis - Gas Chromatography - Mass Spectrometry (in the presence of tetramethylammonium hydroxide) techniques, respectively. The characterisation methods were performed on water samples from three sampling sites of different degree of erosion in the catchment of Crowden Great Brook of Peak District National Park, UK. Particle size distribution results were shown varied spatially and positive relationship was found between log discharge and log dissolve organic carbon (DOC). Long-termed DOC flux was calculated, however no clear temporal trend was observed due to background variability. The method of chemical characterisation using Pyrolysis - Gas Chromatography - Mass Spectrometry was found feasible in identifying and quantifying aquagenic/pedogenic components of natural organic matter, which was shown to vary spatially and under different discharge conditions. Concentrations of such components also seemed to decrease as particle size fractions decreased. |
| Supervisor | Boult, Stephen |
| Department | Environment Sciences and Policy MSc |
| Full text | https://www.etd.ceu.edu/2009/nguyen_quynh.pdf |
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