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Uv Sulfite Advanced Reduction Process For Pfos Transformation In Wastewater Treatment, Cassidy Rae Yates
Uv Sulfite Advanced Reduction Process For Pfos Transformation In Wastewater Treatment, Cassidy Rae Yates
Master's Theses and Capstones
Most nutrients and contaminants within municipal wastewaters are removed through physical, chemical, and biological treatment methods. Per- and polyfluoroalkyl substances (PFAS) are a class of contaminants of emerging concern (CECs) that are concentrated in wastewater treatment facilities (WWTFs) from municipal, industrial, and commercial sources in communities. PFAS are poorly removed in conventional municipal wastewater treatment because these facilities are generally not designed for treatment of low-level CECs. Some PFAS leave WWTFs through aqueous effluent, while others partition to solids and are handled in sludges due to properties based on the degree of fluorination, chain length, and headgroup. As the last …
Per- And Polyfluoroalkyl Substances Mitigation From Contaminated Groundwater Using Halophyte And Cow Bone Biochars, Bailey Papes
Per- And Polyfluoroalkyl Substances Mitigation From Contaminated Groundwater Using Halophyte And Cow Bone Biochars, Bailey Papes
Dissertations, Master's Theses and Master's Reports
Per- and polyfluoroalkyl substances (PFAS) groundwater contamination is a growing concern for the Brackish Groundwater National Desalination Research Facility. Two of the four wells onsite are contaminated with perfluorooctanoic acid (PFOA), perfluorooctane sulfonic acid (PFOS), and perfluorohexane sulfonic acid (PFHxS). The removal of PFAS by adsorption onto powder activated carbon (PAC) is promising, but the production of PAC is energy intensive and expensive. A potential cost-effective alternative to PAC is biochar. This study quantified the capacities of two halophyte biochars, cow bone biochar and PAC to adsorb PFOA, PFOS, and PFHxS from brackish groundwater. The three biochars were ineffective at …
Estimated Greenhouse Gas Emissions From Pfas Treatment Of Maine Drinking Water, Benjamin L. Mcalexander, Onur G. Apul, Mitchell R. Olson, Jean Macrae
Estimated Greenhouse Gas Emissions From Pfas Treatment Of Maine Drinking Water, Benjamin L. Mcalexander, Onur G. Apul, Mitchell R. Olson, Jean Macrae
Maine Policy Review
State law requires the adoption of a maximum contaminant level (MCL) for PFAS contamination in drinking water by June 1, 2024. While discussion of mitigation options has included the degree of risk reduction and the cost of treatment, indirect environmental effects are missing from the conversation. Until other technologies are developed, water treatment in Maine will likely rely on the established, energy-intensive method of PFAS adsorption (binding) to granular activated carbon. We conducted an inventory of greenhouse gas emissions associated with water treatment using this treatment media to fill gaps in the discussion. We found that greenhouse gas emissions for …