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Document Type

Thesis - University Access Only

Award Date

2003

Degree Name

Master of Science (MS)

Department

Chemistry

Abstract

The differences in the chemical composition of dissolved organic carbon (DOC) in surface ground water from a prairie pothole in eastern South Dakota may be a result of sorption of the surface water DOC to mineral surfaces present in the soil. Previous studies have shown that the chemical characteristics of the DOC in a pothole and a groundwater well in the Big River Basin were very different. XAD-8 and XAD-4 resins were used to fractionate the ground and surface water into hydrophobic and hydrophilic acids, bases, and neutrals. Fluorescence spectroscopy, 13C solid-state NMR spectroscopy, elemental analysis, and ultrafiltration characterization techniques were applied to each of the fractions for analysis. The chemical characterization techniques used in this study can be used to differentiate some of the DOC fractions between environments. The data collected showed that the neutral and basic DOC fractions from each environment exhibit the most unique characteristics can be used to distinguish between the environments. It was found that fluorescence spectroscopy can be used to distinguish the water soluble organic carbon (WSOC) fraction in the base and neutral fractions 13C solid-state quantitative NMR can be used to distinguish the base and neutral DOC fractions of the WSOM from the pothole and groundwater DOC. The neutral fractions of the groundwater DOC can be distinguished from the pothole and WSOC DOC based on this characterization.

Library of Congress Subject Headings

Water -- Composition -- South Dakota -- Big Sioux Aquifer

Water -- South Dakota -- Big Sioux Aquifer -- Analysis

Carbon

Format

application/pdf

Number of Pages

127

Publisher

South Dakota State University

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