Please use this identifier to cite or link to this item: https://hdl.handle.net/11681/8540
Title: Extended bioremediation study of the POPILE, Inc., Site, El Dorado, Arkansas
Authors: Applied Research Associates.
Cold Regions Research and Engineering Laboratory (U.S.)
United States. Army. Corps of Engineers. New Orleans District.
United States. Environmental Protection Agency. Region VI.
Strategic Environmental Research and Development Program (U.S.)
Hansen, Lance D.
Nestler, Catherine C.
Ringelberg, David B.
Keywords: Contaminant leachability
Creosote
Landfarming
Microbial community analysis
Phospholipid fatty acid
PLFA
Priority organic pollutant
POP
Polycyclic aromatic hydrocarbons
PAH
Bioremediation
El Dorado
Arkansas
Hazardous waste sites
Superfund sites
Publisher: Environmental Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC TR ; 01-12.
Description: Technical Report
Abstract: A pilot scale study was conducted using land treatment units (LTUs) to evaluate the efficacy of bioremediation using traditional landfarming technology on contaminated soil from a wood treatment facility. An initial 6-month, intensive treatment plan was followed by 24 months of treatment that was performed quarterly. Initial site characterization indicated a clay/silt soil with contamination levels of 13,000 mg/kg polycyclic aromatic hydrocarbons (PARs), 105 mg/kg benzo(a)pyrene equivalents, and 1500 mg/kg pentacholorphenol (PCP). PAH concentrations declined, reaching a plateau at 13 months, followed by a second reduction. Gas chromatograohy with mass spectrometry analysis of the contaminants showed removal into the four-ring PAHs. Leachability tests at 22 months showed that contaminant leaching from treated material was negligible. The concentration of available PCP was not reduced in either LTU. Chemical analysis was coupled with phospholipid fatty acid (PLFA) bacterial characterization. Significant biological activity was demonstrated, even at these high contaminant concentrations. PLFA analysis showed an increase in biomass and a divergence in community composition between the initial and final soils and between the two experimental soils.
URI: http://hdl.handle.net/11681/8540
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