The Rock Eval6™ is an instrument typically utilized in the characterization of source Rocks for their hydrocarbon potential. Recently, the application of the Rock Eval6™ has been expanding, and this instrument has proven successful in the evaluation of recent sediments. This study looks to further expand upon these applications by collecting suspended sediments in a network of streams in Bayou Chene, Louisiana, and testing them using the Rock Eval6™. Measured response curves from gasses generated during pyrolysis were deconvolved, elucidating the components of organic matter (OM) that comprised the gas signals. Clear changes in the type of OM (immature, mature, humic, carbonaceous, etc.) were seen in samples collected in April vs. samples collected in July. Samples in April evinced a larger portion of measured pyrolyzable carbon (PC) released at lower temperatures (380–430°C being the most dominant) than samples collected in July (450–470°C being the most dominant). There was no clear trend when plotting the changes in concentration of OM by distance travelled downstream. The distributions of the amounts of PC found at different temperature ranges were also heterogeneous. All the results were challenging to interpret, but it is clear that Rock Eval pyrolysis is capable of pinpointing subtle differences in the types and amounts of suspended organic matter in streams. Future work should focus on characterization of the PC fractions and how they may relate to the surrounding environment.
|Commitee:||Gottardi, Raphael, Poudel, Durga, Schubert, Brian|
|School:||University of Louisiana at Lafayette|
|School Location:||United States -- Louisiana|
|Source:||MAI 57/05M(E), Masters Abstracts International|
|Keywords:||Matter, Organic, Oxidation, Pyrolysis, Sediments, Suspended|
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