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Browsing by Author "Ojeda, Ann"
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Assessing Private Well Water Quality in Mobile and Baldwin Counties, Alabama
Millner, Sidney (2024-04-29) ETD File Embargoed
Approximately 43 million people in the United States rely on private well water. Lack of regulation is important due sources of contamination from geogenic and anthropogenic sources. One source of anthropogenic contamination ...
Assessment of Bioenhanced Back Diffusion and Reductive Dehalogenase Gene Abundance in an Aquifer Cell Packed with Heterogenous Soils
Cothran, Spencer (2023-04-26)
Remediation of chlorinated ethenes can be challenging at complex contaminated sites with low permeability soils acting as secondary source zones due to back diffusion of adsorbed contaminant mass. To better understand how ...
Biotransformation of Perfluorooctane Sulfonamide (FOSA), 8:2 Fluorotelomer Alcohol (8:2 FTOH), and 6:2 Fluorotelomer Sulfonate (6:2 FTS) in Aqueous Film-Forming Foam (AFFF)-Impacted Soils under Oxic and Anoxic Conditions
Yan, Pengfei (2022-12-05) ETD File Embargoed
The use of aqueous film-forming foams (AFFFs) for fire suppression over decades has resulted in contamination of numerous sites by per- and polyfluoroalkyl substances (PFAS). However, the environmental fate and transformation ...
Evaluating the Impact of Onsite Wastewater Treatment Systems on Watershed Contamination, Choccolocco Creek Watershed, Alabama
Jordan, Mallory (2022-06-29) ETD File Embargoed
There is increasing evidence that onsite wastewater treatment systems (OWTSs) can be a significant, and possibly underestimated, source of water contamination. OWTSs effectively treat wastewater when located in suitable ...
Exploration of groundwater knowledge and private well programs across the United States
Foust, Bethany (2024-04-24) ETD File Embargoed
Groundwater serves one third of the United States (US) population as their main source of drinking water. Groundwater accessed from private wells serves about 15% of the population. Private well water is not regulated by ...
Exploring Geochemical Methods to Measure Arsenic-Dissolved Organic Matter Complexes and Coal Combustion Residuals in Surface Water
Herron, Caitlyn (2022-08-15)
Chapter 1, investigates the geochemical controls governing arsenic (As) mobility, precisely the formation of As-DOM complexes. Dissolved organic matter (DOM) reduces As mobility through equilibrium binding of As to the ...
Investigating E. coli Contamination in Choccolocco Creek, AL
Larson, Eleanore (2022-08-16)
Pathogen loading, specifically high Escherichia coli (E. coli) concentrations, is a major cause for poor surface water quality worldwide. Many rivers and streams are used recreationally, and contamination poses a communal ...
Isotopic Fractionation of Chlorinated Hydrocarbon Compounds During Sorption to Activated Carbon
Gibson, Andrew (2024-04-29)
Activated carbon (AC) amendments are leading remediation efforts of groundwater systems containing organic contaminants. More recently, in situ AC treatment is being explored to sequester contaminants in place. However, ...
Sorptive Removal of Per- and Polyfluoroalkyl Substances (PFAS) from Water by Biochars
Krebsbach, Samuel (2023-05-01)
This thesis aims to employ biochar (a carbonaceous material) as a cost-effective sorbent to remove per- and polyfluoroalkyl substance (PFAS) from water by two case studies. Study 1 seeks to identify which biochars perform ...