||Fate of Fenthion in Salt-Marsh Environments: 2. Transport and Biodegradation in Microcosms.
O'Neill, E. J. ;
Cripe, C. R. ;
Mueller, L. H. ;
Connolly, J. P. ;
Pritchard, P. H. ;
||Technical Resources, Inc., Gulf Breeze, FL. ;Manhattan Coll., Bronx, NY. Dept. of Environmental Engineering.;Environmental Research Lab., Gulf Breeze, FL.
||EPA-68-03-6265 ;EPA-68-03-2134; EPA/600/J-89/161;
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||The fate of fenthion was examined in microcosms to define the possible interaction between sediment and biodegradation in the field. A mathematical model was also calibrated to calculate the distribution of fenthion in microcosms. Intact sediment cores, both with and without Juncus roemerianus, were removed from a salt marsh and placed into microcosm vessels to simulate the undisturbed sediment bed of a salt marsh and the areas containing Juncus. In formalin-sterilized microcosms without plants, fenthion disappeared exponentially from the water column with a half-life of 105.0 h. Fenthion had a half-life of 35.5 h in the microcosm without plants. In microcosm with plants, the half-life was slightly faster (33.2 h). In fractionated sediment cores, fenthion was found at greater depths in nonsterile systems than predicted by diffusion and sorption in sterile microcosms, possibly because of bioturbation.
||Pub. in Environmental Toxicology and Chemistry, v8 n9 p759-768 1989. See also PB90-129461. Prepared in cooperation with Manhattan Coll., Bronx, NY. Dept. of Environmental Engineering. Sponsored by Environmental Research Lab., Gulf Breeze, FL.
|NTIS Title Notes
||Reprint: Fate of Fenthion in Salt-Marsh Environments: 2. Transport and Biodegradation in Microcosms.
||68E; 68D; 57K; 47D
||PC A03/MF A01