||In-situ biotransformation of carbon tetrachloride under anoxic conditions /
Semprini, Lewis. ;
Hopkins, G. D. ;
Janssen, D. B. ;
Lang, M. ;
Roberts, P. V.
||Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
|| Robert S. Kerr Environmental Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Pollutants--Structure-activity relationships. ;
Organic water pollutants--Biodegradation. ;
Carbon tetrachloride ;
Anaerobic bacteria ;
Chemical water pollutants ;
Field tests ;
Mathematical models ;
Ground water ;
Soil contamination ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.