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Remediation of Petroleum-Contaminated Groundwater Using High Carbon Content Fly Ash
Approximately 90% of the coal used in the United States is burned to produce electricity. As a result, the power plants produce vast quantities of Class F fly ash. The amount of unburned carbon in these fly ashes has been increasing in the last decade due to introduction of low nitrogen oxide burners to coal-burning power plants. Such fly ashes have no value as a concrete additive and require high land-filling costs. The objective of this study was to investigate potential use of these high carbon content fly ashes (HCCFA) in sorptive barrier applications. Naphthalene and o-xylene sorption onto fly ash was studied in a series of batch adsorption tests. Column sorption tests were also conducted on sand-fly ash mixtures with naphthalene and o-xylene. The results indicated that HCCFA has significant capacity for retardation of petroleum contaminants in barrier applications. Sorbed amounts measured in batch scale tests and breakthrough curves from column tests suggested that the amount and type of carbon has a significant effect on remediation efficiency.
Remediation of Petroleum-Contaminated Groundwater Using High Carbon Content Fly Ash
Approximately 90% of the coal used in the United States is burned to produce electricity. As a result, the power plants produce vast quantities of Class F fly ash. The amount of unburned carbon in these fly ashes has been increasing in the last decade due to introduction of low nitrogen oxide burners to coal-burning power plants. Such fly ashes have no value as a concrete additive and require high land-filling costs. The objective of this study was to investigate potential use of these high carbon content fly ashes (HCCFA) in sorptive barrier applications. Naphthalene and o-xylene sorption onto fly ash was studied in a series of batch adsorption tests. Column sorption tests were also conducted on sand-fly ash mixtures with naphthalene and o-xylene. The results indicated that HCCFA has significant capacity for retardation of petroleum contaminants in barrier applications. Sorbed amounts measured in batch scale tests and breakthrough curves from column tests suggested that the amount and type of carbon has a significant effect on remediation efficiency.
Remediation of Petroleum-Contaminated Groundwater Using High Carbon Content Fly Ash
Demirkan, M. Melih (author) / Morar, Doina (author) / Aydilek, Ahmet H. (author) / Seagren, Eric A. (author) / Tsai, Alice (author)
GeoCongress 2008 ; 2008 ; New Orleans, Louisiana, United States
GeoCongress 2008 ; 551-558
2008-03-07
Conference paper
Electronic Resource
English
Remediation of Petroleum-Contaminated Groundwater Using High Carbon Content Fly Ash
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