Record Display for the EPA National Library Catalog

RECORD NUMBER: 20 OF 29

OLS Field Name OLS Field Data
Main Title Sequential Dehalogenation of Chlorinated Ethenes.
Author Barrio-Lage, G. ; Parsons, F. Z. ; Nassar, R. S. ; Lorenzo, P. A. ;
CORP Author Florida International Univ., Miami. Drinking Water Research Center.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1986
Report Number EPA-R-809994; EPA/600/J-86/030;
Stock Number PB86-190188
Additional Subjects Chemical reactions ; Chromatographic analysis ; Reduction(Chemistry) ; Ground water ; Vinyl chloride ; Reprints ; Ethylene/dichloro ; Microcosms ; Dehalogenation ; Chemical reaction kinetics
Holdings
Library Call Number Additional Info Location Last
Modified
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Status
NTIS  PB86-190188 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation 6p
Abstract
Reductive dehalogenation of tetra- and tri-chloroethene to cis- and trans-1,2-dichloroethene in microcoms simulating ground water environment has previously been demonstrated. In the study, anoxic microcosms containing organic sediment and water were spiked to contain 5 mg/L of one of the following compounds: 1,1-dichloroethene (1,1-DCE), cis-1,2-dichloroethene (CIS), or trans-1,2-dichloroethene (TRANS). After incubation in the dark at 25 deg C for up to six months, contents were analyzed by gas chromatography, and verified by GC/MS in an attempt to identify sequential steps in the transformation process. Vinyl chloride (VC) was produced after 1 to 2 weeks of incubation in all spiked microcosms, but none was observed in sterile and unspiked controls. Chloroethane (CE) was produced only in microcosms spiked with CIS, indicating isomer specificity and the occurrence of mechanisms other than reductive dechlorination. Kinetics parameters associated with the microbial dehalogenation of 1,1-DCE, CIS, and TRANS were calculated.