Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title Inhibition of Alkylbenzene Biodegradation under Denitrifying Conditions by Using Acetylene Block Technique.
Author Hutchins, S. R. ;
CORP Author ManTech Environmental Technology, Inc., Ada, OK.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher c1992
Year Published 1992
Report Number EPA/600/J-92/393;
Stock Number PB93-121242
Additional Subjects Water pollution control ; Biodeterioration ; Aquifers ; Microbial degradation ; Oil pollution ; Denitrification ; Ground water ; Acetylene ; Microorganisms ; Biological treatment ; Performance evaluation ; Fuels ; Reprints ; Acetylene block technique
Library Call Number Additional Info Location Last
NTIS  PB93-121242 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 06/08/1993
Collation 6p
Aquifers contaminated with gasoline and other fuels often exhibit levels of benzene, toluene, ethylbenzene, and xylenes (BTEX) in excess of regulatory limits mandated by the U.S. Environmental Protection Agency. Addition of acetylene to microcosms simultaneously amended with nitrate and alkylbenzenes resulted in inhibition of the rate of alkylbenzene biodegradation under denitrifying conditions. Toluene, xylenes, and 1,2,4-trimethylbenzene were recalcitrant, whereas ethylbenzene was degraded at a slower rate than usual. Benzene was not degraded in either case. Addition of acetylene to microcosms preexposed to nitrate and alkylbenzenes produced similar inhibition. These data indicate that the activities of microorganisms that degrade alkylbenzenes under denitrifying conditions may be suppressed if the standard acetylene block technique is used to verify denitrifying activity.