||Enhanced bioremediation of BTEX using immobilized nutrients : field demonstration and monitoring /
Borden, R. C. ;
Goin, R. T. ;
Kao, C. M. ;
Rosal, C. G.
||North Carolina State Univ. at Raleigh. Dept. of Civil Engineering.;Environmental Protection Agency, Las Vegas, NV. National Exposure Research Lab.
|| National Exposure Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Hazardous substances--Biodegradation. ;
Water treatment ;
Ethyl benzene ;
Water pollution control ;
Ground water ;
Biochemical reaction kinetics ;
Aerobic processes ;
Environmental transport ;
BTEX(Benzene Toluene Ethylbenzene Xylene) ;
Calcium peroxide ;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||1 volume (various pagings) : illustrations ; 28 cm
A permeable barrier system was developed for controlling the migration of dissolved contaminant plumes in ground water. The barrier system consisted of a line of closely spaced wells installed perpendicular to the contaminant plume. Each well contained concrete briquets that released oxygen and nitrate at a controlled rate, enhancing the aerobic biodegradation of dissolved hydrocarbons in the downgradient aquifer. A full scale permeable barrier system was constructed at a gasoline-spill site near Leland, NC. Initially, increased dissolved oxygen and decreased benzene, toluene, ethylbenzene, and xylene isomer (BTEX) concentrations in the downgradient aquifer indicated that oxygen released from the remediation wells was enhancing biodegradation. Field tracer tests and soil analyses performed at the conclusion of the project indicated that the aquifer in the vicinity of the remediation wells was being clogged by precipitation from iron minerals.
"This study was conducted in cooperation with Dept. of Civil Engineering, North Carolina State University." Shipping list no.: 98-0378-M. "December 1996." Includes bibliographical references (pages R1-R2). "Cooperative agreement number CR820468." Microfiche.