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Title: Ethanol-enhanced bioremediation of PAH-contaminated soils

Abstract

Bioremediation of soils contaminated with polycyclic aromatic hydrocarbons (PAHs) is highly challenging because of the low solubility and strong sorption properties of PAHs to soil organic matter. Two PAH-contaminated soils from former manufactured gas plant (MGP) sites were pretreated with ethanol to enhance the bioavailability of PAH compounds. The biodegradation of various PAHs in the pretreated soils was assessed using soil slurry reactor studies. The time needed to degrade 90% of the total PAH in the pretreated soils was at least 5 days faster than soils that were not pretreated with ethanol. A distinctive advantage with the pretreatment of soils with ethanol was the enhanced removal of 4-ring compounds such as chrysene. Approximately 90% of chrysene in the ethanol-treated soils were removed within 15 days while soils without pretreatment needed more than 30 days to obtain similar removal levels. After 35 days of biotreatment in the slurry reactors, approximately 40% of benzo(a)pyrene were removed in the ethanol-treated soils while only 20% were removed in soils not pretreated with ethanol.

Authors:
; ;
Publication Date:
Research Org.:
Iowa State Univ., Ames, IA (US)
OSTI Identifier:
20014813
Resource Type:
Conference
Resource Relation:
Conference: ASCE-CSCE 1999 National Conference on Environmental Engineering, Norfolk, VA (US), 07/25/1999--07/28/1999; Other Information: PBD: 1999; Related Information: In: Environmental engineering 1999, by Schafran, G.C. [ed.], 936 pages.
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 01 COAL, LIGNITE, AND PEAT; REMEDIAL ACTION; SOILS; POLYCYCLIC AROMATIC HYDROCARBONS; ETHANOL; CHRYSENE; BIOREACTORS; CONDENSED AROMATICS; BIODEGRADATION; COAL GASIFICATION PLANTS

Citation Formats

Lee, P H, Ong, S K, and Golchin, J. Ethanol-enhanced bioremediation of PAH-contaminated soils. United States: N. p., 1999. Web.
Lee, P H, Ong, S K, & Golchin, J. Ethanol-enhanced bioremediation of PAH-contaminated soils. United States.
Lee, P H, Ong, S K, and Golchin, J. Thu . "Ethanol-enhanced bioremediation of PAH-contaminated soils". United States.
@article{osti_20014813,
title = {Ethanol-enhanced bioremediation of PAH-contaminated soils},
author = {Lee, P H and Ong, S K and Golchin, J},
abstractNote = {Bioremediation of soils contaminated with polycyclic aromatic hydrocarbons (PAHs) is highly challenging because of the low solubility and strong sorption properties of PAHs to soil organic matter. Two PAH-contaminated soils from former manufactured gas plant (MGP) sites were pretreated with ethanol to enhance the bioavailability of PAH compounds. The biodegradation of various PAHs in the pretreated soils was assessed using soil slurry reactor studies. The time needed to degrade 90% of the total PAH in the pretreated soils was at least 5 days faster than soils that were not pretreated with ethanol. A distinctive advantage with the pretreatment of soils with ethanol was the enhanced removal of 4-ring compounds such as chrysene. Approximately 90% of chrysene in the ethanol-treated soils were removed within 15 days while soils without pretreatment needed more than 30 days to obtain similar removal levels. After 35 days of biotreatment in the slurry reactors, approximately 40% of benzo(a)pyrene were removed in the ethanol-treated soils while only 20% were removed in soils not pretreated with ethanol.},
doi = {},
url = {https://www.osti.gov/biblio/20014813}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1999},
month = {7}
}

Conference:
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