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A field study was conducted to determine the linkage between dissolved organic matter (DOM) quality and bedrock geology. Sediment and water samples were collected from six streams, three flowing over sandstone and three flowing over limestone bedrock in the Bankhead National Forest, Alabama. Various stream water and sediment characteristics were determined by standard limnological methods and DOM...
The diminishing clean oil reserve is driving the search for new or improved ways to reduce the level of NSO-containing species found in high abundance in heavy crude oils. Hydrotreatment is the currently preferred technique to remove those polar species. Unfortunately, nitrogen-containing compounds cause coke formation on the surface of the hydrotreatment catalyst, leading to partial or complete deactivation...
Molecular-level characterization of natural organic matter (NOM) has been elusive due to the inherent complexity of natural organic mixtures and to the fact that individual components are often polar and macromolecular. Electrospray ionization (ESI) is a “soft” ionization technique that ionizes polar compounds from aqueous solution prior to injection into a mass spectrometer. The highest resolution...
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