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Full-Text Articles in Engineering
Microcosm Evaluation Of Enhanced Bioremediation For Halogenated Methanes At A Former Industrial Site, Hao Wang
Microcosm Evaluation Of Enhanced Bioremediation For Halogenated Methanes At A Former Industrial Site, Hao Wang
All Theses
Halogenated methanes are among the most frequently encountered contaminants at hazardous waste sites. One such site in California is contaminated with chloroform (CF), carbon tetrachloride (CT), and trichlorofluoromethane (CFC-11). CF, CT and CFC-11 are the main focus of this research; they are present at the California site at concentrations in the mg per liter range and a plume of contaminated groundwater emanating from a source zone is approaching a property boundary, necessitating remediation. Anaerobic bioremediation is one of the technologies under consideration for addressing the source zone and the less concentrated downgradient plume. A microcosm study was performed to evaluate …
Microcosm Evaluation Of Enhanced Bioremediation For An Industrial Site Contaminated With Chlorinated Ethenes, Chlorinated Benzenes, And Benzene, Christopher Moss
Microcosm Evaluation Of Enhanced Bioremediation For An Industrial Site Contaminated With Chlorinated Ethenes, Chlorinated Benzenes, And Benzene, Christopher Moss
All Theses
Groundwater contaminants at an industrial site in South Carolina include tetrachloroethene (PCE), trichloroethene (TCE), cis-1,2-dichloroethene (cDCE), vinyl chloride (VC), 1,2,4-trichlorobenzene (1,2,4-TCB), 1,2-dichlorobenzene (1,2-DCB), 1,4-dichlorobenzene (1,4-DCB), chlorobenzene (CB), and benzene. The source areas at the site include a tank farm area, a grease trap area, the former wastewater lagoons (WWTP) and the former oil retention pond (ORP). A microcosm evaluation was preformed to determine the potential for bioremediation to treat the organic contaminants in the four source areas (within the saturated zone) and in a downgradient portion of the groundwater plume. The objectives were to evaluate 1) anaerobic treatment at the …
Biodegradation Of Hexahydro-1,3,5-Trinitro-1,3,5-Triazine (Rdx) Using Photosynthetic Bacteria, Sarah Galloway
Biodegradation Of Hexahydro-1,3,5-Trinitro-1,3,5-Triazine (Rdx) Using Photosynthetic Bacteria, Sarah Galloway
All Theses
Hexahydro-1,3,5-trinitro-1,3,5-triazine (RDX) is an emerging contaminant according to the Environmental Protection Agency (EPA). RDX was introduced as a secondary explosive during World War II. It is still used in many explosive such as hand grenades. RDX enters the environment mostly through the manufacturing process or from the use of explosives. RDX is a suspected carcinogen and can also affect the nervous system of humans. Therefore, RDX has become a chemical of concern across many United States military bases and open and closed manufacturing plants. The goal of this research was to evaluate the biodegradation of RDX via two phototrophic bacteria: …
Microcosm Study Of 1,4-Dioxane Biotransformation, Philip Arve
Microcosm Study Of 1,4-Dioxane Biotransformation, Philip Arve
All Theses
1,4-Dioxane is an emerging groundwater contaminant and probable human carcinogen with considerable potential remediation costs due to its hydrophilic and recalcitrant nature. Commonly occurring with 1,1,1-trichloroethane (1,1,1-TCA) plumes due to its application as a solvent stabilizer, 1,4-dioxane is also used in industrial lubricants and occurs as an impurity in numerous personal care products. Current treatment strategies to treat dioxane contamination include advanced oxidation processes and biological treatment, though only aerobic paths of biodegradation are currently understood. Laboratory and field studies have indicated the possible inhibitory effects of 1,1,1-TCA and its abiotically transformed daughter product, 1,1-dichloroethene (1,1-DCE) on the aerobic biodegradation …