Natural organic matter and their binding to iron (iii) hydr(oxides) as studied by fluorescence spectroscopy and flow adsorption microcalorimetryShow full item record
|Title||Natural organic matter and their binding to iron (iii) hydr(oxides) as studied by fluorescence spectroscopy and flow adsorption microcalorimetry|
|Degree||Master of Science|
|Abstract||Organic matter (OM) is complex with controlling roles in global carbon, nutrient and contaminant cycling. The first part of this study combines 2D- (2D-PCFS) and time-resolved fluorescence spectroscopy in characterizing OM from fire- and non-fire-processed sources. Fire- and non-fire-processed OM produced 2D-PCFS spectra that were respectively, blue- and red-shifted compared to their unprocessed counterparts. Blue shift increased with burn temperature which was positively correlated to intensity-weighted lifetime of water-extracted OM components. The lifetime-temperature relationship was used to predict fire temperatures at tree- and field-scales. The second part of this study combines energetics data from flow adsorption microcalorimetry (FAMC) with 2D-PCFS and UV-vis spectroscopy to assess sorptive characteristics of fire- versus non-fire-processed OM on ferrihydrite. Energetics and kinetics data showed that OM-ferrihydrite interactions had both endothermic and exothermic steps with rates that were pH dependent and inversely related to the energy of reaction. No evidence of ferrihydrite-induced OM changes were observed.|
This item appears in the following Collection(s)
- Masters Theses 
Showing a few items related by title, author, creator and subject.