||Bioconcentration of Toxaphene by Microorganisms.
Paris, Doris F. ;
Lewis, David L. ;
Barnett., John T. ;
||Environmental Research Lab., Athens, Ga.
Chlorine aliphatic compounds ;
Aquatic microbiology ;
Pesticide residues ;
Water pollution effects(Animals)
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||Analyses (glc) of extracts from whole cultures (medium and microorganisms) gave the same 'fingerprint' chromatogram as the control, indicating that toxaphene was not degraded even after extended periods of time. The insecticide was also added to autoclaved cultures of bacteria, fungi, and algae which sorbed as much or a little more pesticide than the viable cells. Therefore, the observed sorption was not the result of a metabolically active process. Desorption of toxaphene was studied by harvesting bacterial cells that had reached equilibrium in the pesticide solution and resuspending them in medium containing no pesticides. Samples were centrifuged, and extracted, and the supernatant was analyzed for pesticide as described. Desorption equilibrium was achieved in as short a time as was equilibrium in the sorption studies and the distribution coefficient were the same.
||Pub. in Bulletin of Environmental Contamination and Toxicology, v17 n5 p564-572 1977.
|NTIS Title Notes
|PUB Date Free Form
||6F; 6M; 13B; 68E; 68D; 57K
||Not available NTIS