||Inhibition of Alkylbenzene Biodegradation under Denitrifying Conditions by Using Acetylene Block Technique.
Hutchins, S. R. ;
||ManTech Environmental Technology, Inc., Ada, OK.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Water pollution control ;
Microbial degradation ;
Oil pollution ;
Ground water ;
Biological treatment ;
Performance evaluation ;
Acetylene block technique
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.
||Pub. in Applied and Environmental Microbiology, v58 n10 p3395-3398 Oct 92. Sponsored by Robert S. Kerr Environmental Research Lab., Ada, OK.
|NTIS Title Notes
||Reprint: Inhibition of Alkylbenzene Biodegradation under Denitrifying Conditions by Using Acetylene Block Technique.
||68D; 57K; 97K; 97R
||PC A02/MF A01