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Full-Text Articles in Physical Sciences and Mathematics
Removal Of Perfluorinated Compounds From Post-Emergency Wastewater By Advanced Oxidation Process And Granular Activated Carbon Adsorption, Sean M. Dyson
Theses and Dissertations
This research presents a novel approach to remove per- and polyfluoroalkyl substances (PFAS) from aqueous film-forming foam (AFFF) impacted wastewater with high (~100 mg/L) total organic carbon (TOC) concentrations. A treatment-train process was investigated involving an ultraviolet (UV)/hydrogen peroxide (H2O2) advanced oxidation process (AOP) followed by filtration using Calgon Filtrasorb® 600 (F600) granular activated carbon (GAC). UV/H2O2 AOP experiments were conducted to determine whether TOC concentrations could be reduced as a pre-treatment step before filtering the water with F600-GAC. Results showed using UV/H2O2 AOP reduced TOC in solution by > 98% (< 2 mg/L down from 99.1 mg/L). Reducing TOC concentrations was achieved by using a 250 mg/L H2O2 …
Application Of Ultraviolet Light Emitting Diodes For The Advanced Oxidation Of Guar Gum, Andrew W. Davenport
Application Of Ultraviolet Light Emitting Diodes For The Advanced Oxidation Of Guar Gum, Andrew W. Davenport
Theses and Dissertations
Guar Gum (GG) is one of the problematic water pollutants connected to hydraulic fracturing. There is a pressing need to investigate appropriate unit operations that can be employed to protect the aquatic environment. This study investigated the use of light-emitting diodes (LEDs) in the advanced oxidation process (AOP) of GG. Chemical oxygen demand (COD) removal provided mixed results, depending on the concentration of hydrogen peroxide (H2O2) in solution, and was between (0-95%) for H2O2-to-GG ratios between 7.0 and 176.3 g H2O2/g GG. COD removal was greatest at the …