Solid state $\sp{13}$C NMR, Inverse Gas Chromatography and elemental analysis have been used to study the early diagenesis of organic matter of peat deposits from the Florida Everglades and to develop correlations between the structure of the organic matter and its affinity for non-polar organic compounds. / The structure of the sedimentary organic matter and its fraction was studied by solid state $\sp{13}$C NMR cross polarization and dipolar dephasing NMR experiments. The changes in the different polar, aliphatic and aromatic groups are used to discern the different chemical pathways that operate during early diagenesis. In addition, the degree of substitution of the aromatic structures of the sediments, and the effect of acid dissolution of minerals on the structure of sedimentary organic matter were studied. NMR methodology to provide reliable information about the functional group distributions of sedimentary organic matter as well as the various factors that affect the reliability of the NMR measurements are also discussed. / $\sp{13}$C NMR and elemental analysis of the sediments indicate that the carbohydrate is selectively degraded while aromatic structures were preserved. The structure of the organic matter becomes more reduced and crosslinked with age. / IGC was used to evaluate relative affinity of these peats and their fractions for a number of selected non-ionic organic compounds. The different fractions of the organic matter were used as stationary phases and non-ionic organic compounds are used as chromatographic probes. Their elution patterns and retention volumes were used to calculate activity coefficients. The relative affinity of the sedimentary organic matter and its fractions as a function of their chemical composition and origin was then investigated as well as the role of the different fractions of the organic matter in the total sorption process. Experimental results indicate that the lipid fraction plays a dominant role in the sorption process and that the affinity of intact sediments, humin and humic acid fractions is dominated by their relative distribution of polar, aliphatic and aromatic groups. Sorption-structure response surfaces were used to express the relationships between polarity and affinity in these organic sediments. / Source: Dissertation Abstracts International, Volume: 51-01, Section: B, page: 0110. / Major Professor: William Theophilus Cooper, III. / Thesis (Ph.D.)--The Florida State University, 1989.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_78156 |
| Contributors | Collazo-Lopez, Humberto., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 251 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
Page generated in 0.0016 seconds