Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title In-situ biotransformation of carbon tetrachloride under anoxic conditions /
Author Semprini, Lewis. ; Hopkins, G. D. ; Janssen, D. B. ; Lang, M. ; Roberts, P. V.
Other Authors
Author Title of a Work
Hopkins, Gary D.
Janssen, Dick B.
Lang, Margaret.
Roberts, Paul V.
McCarty, Perry L.
Downs, Wayne C.
CORP Author Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Publisher Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1991
Report Number EPA/600/2-90/060
Stock Number PB91-148346
Subjects Pollutants--Structure-activity relationships. ; Organic water pollutants--Biodegradation. ; Leachate--Mathematical models.
Additional Subjects Carbon tetrachloride ; Biotransformation ; Anaerobic bacteria ; Chemical water pollutants ; Field tests ; Mathematical models ; Trichloroethanes ; Freons ; Ground water ; Graphs(Charts) ; Soil contamination ; Aquifers ; Gas chromatography
Library Call Number Additional Info Location Last
NTIS  PB91-148346 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 01/01/1988
Collation 107 pages : illustrations ; 28 cm
A field and laboratory project evaluated the possibility of stimulating a native bacterial population to biotransform carbon tetrachloride (CT) under anoxic conditions. In addition, the transformation of 1,1,1-trichloroethane (TCA), Freon-11, and Freon-113 present as background contaminants in the test zone groundwater were also evaluated. After biostimulation by injection of acetate into a shallow confined aquifer consisting of unconsolidated alluvial sand, the following degrees of transformation were observed: CT, 95%; TCA, 15%; Freon-11, 68%; Freon-113, 20%. These biotransformations were achieved in a biostimulated zone within 2 meters of the injection point. Laboratory and mathematical modeling were also considered. Mathematical modeling of the transport and transformation process confirmed that the behavior observed in the field demonstration was consistent with the results of the laboratory research and theoretical expectations.
"Wayne C. Downs, project officer." "January 1991." "EPA/600/2-90/060." "Funded wholly or in part by the United States Environmental Protection Agency, under CR-815816 to Stanford University"--Title page verso. Includes bibliographical references (pages 91-95). Microfiche.