Title:
Enhanced Wastewater Reclamation with Carbonaceous Membranes
Enhanced Wastewater Reclamation with Carbonaceous Membranes
Author(s)
White, Haley D.
Advisor(s)
Lively, Ryan P.
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Abstract
The need for energy-efficient aqueous waste stream reclamation technologies is becoming more urgent as global population, energy demand, and water consumption continue to increase. Many of these aqueous waste streams contain recalcitrant organic contaminants, such as pharmaceuticals, industrially used solvents, and personal care products, that must be removed prior to reuse. We hypothesize that rigid carbonaceous materials can better remove organic contaminants due to an increase in entropic selectivity relative to separations involving flexible membrane materials. Here, fundamentals in transition state theory and thermodynamics are used to develop a model that can predict the separations of example organic-laden aqueous waste streams in reverse osmosis processes using rigid nanoporous materials. Favorable results from the model prompt fabrication of a novel CMS adsorbent material derived from a fully aromatic polyamide precursor; characterizations of this material enable predictions of removing an example organic, n, n- dimethylformamide (DMF), with over 92% rejection. Next, carbonaceous hollow fiber membranes derived from a polymer of intrinsic microporosity (PIM)-1 precursor were fabricated and used to separate simulated waste streams containing DMF in reverse osmosis experiments. Data from these experiments reveal the concentration of DMF due to a transport behavior called “Sorp-Vection”. Overall, this thesis highlights fundamental information about the potential for rigid materials to separate organic-laden aqueous streams for reclamation and reuse.
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Date Issued
2022-07-28
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Text
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Dissertation