Main Title |
Column Studies on BTEX Biodegradation under Microaerophilic and Denitrifying Conditions. |
Author |
Hutchins, S. R. ;
Moolenaar, S. W. ;
Rhodes., D. E. ;
|
CORP Author |
Robert S. Kerr Environmental Research Lab., Ada, OK. ;Rice Univ., Houston, TX. |
Publisher |
1992 |
Year Published |
1992 |
Report Number |
EPA/600/A-92/080; |
Stock Number |
PB92-179050 |
Additional Subjects |
Water pollution control ;
Biodegradation ;
Denitrification ;
Aquifers ;
Petroleum products ;
Microbial degradation ;
Ground water ;
Microorganisms ;
Underground storage ;
Storage tanks ;
Nitrates ;
Oxidation ;
Oil spills ;
Leakage ;
Environmental transport ;
Benzene ;
Toluene ;
Xylenes ;
Michigan ;
Experimental design ;
Reprints ;
Traverse City(Michigan) ;
Benzene/trimethyl
|
Internet Access |
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Holdings |
Library |
Call Number |
Additional Info |
Location |
Last Modified |
Checkout Status |
NTIS |
PB92-179050 |
Some EPA libraries have a fiche copy filed under the call number shown. |
|
07/26/2022 |
|
Collation |
27p |
Abstract |
Two column tests were conducted using aquifer material to simulate the nitrate field demonstration project carried out earlier at Traverse City, Michigan. The objectives were to better define the effect nitrate addition had on biodegradation of benzene, toluene, ethylbenzene, xylenes, and trimethylbenzenes (BTEX) in the field study, and to determine whether BTEX removal can be enhanced by supplying a limited amount of oxygen as a supplemental electron acceptor. Columns were operated using limited oxygen, limited oxygen plus nitrate, and nitrate alone. In the first column study, benzene was generally recalcitrant compared to the alkylbenzenes (TEX), although some removal did occur. The average benzene breakthroughs were 74.3 + or - 5.8%, 75.9 + or - 12.1%, and 63.1 + or - 9.6% in the columns with limited oxygen, limited oxygen plus nitrate, and nitrate alone, respectively, whereas the corresponding average effluent TEX breakthroughs were 22.9 + or - 2.3%, 2.9 + or - 1.1%, and 4.3 + or - 3.3%. In the second column study, nitrate was deleted from the feed to the column originally receiving nitrate alone and added to the feed of the column originally receiving limited oxygen alone. Benzene breakthrough was similar for each column. Breakthrough of TEX decreased by an order of magnitude once nitrate was added to the microaerophilic column, whereas TEX breakthrough increased by 50-fold once nitrate as removed from the denitrifying column. Although the requirement for nitrate for optimum TEX removal was clearly demonstrated in these columns, there were significant contributions by biotic and abiotic processes other than denitrification which could not be quantified. |
Supplementary Notes |
Pub. in Ground Water: The Problem and Some Solutions. Proceedings, Annual Symposium (4th). The Gulf Coast Hazardous Substance Research Center, Beaumont, TX., April 2-3, 1992, p67-90. See also PB92-121227 and PB92-124262. Prepared in cooperation with Rice Univ., Houston, TX. |
NTIS Title Notes |
Journal article May 88-Jul 93. |
Title Annotations |
Reprint: Column Studies on BTEX Biodegradation under Microaerophilic and Denitrifying Conditions. |
Category Codes |
68D; 57K; 97R; 97K |
NTIS Prices |
PC A03/MF A01 |
Primary Description |
600/15 |
Document Type |
NT |
Cataloging Source |
NTIS/MT |
Control Number |
217730016 |
Origin |
NTIS |
Type |
CAT |