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Main Title Investigation of means for controlled self-destruction of pesticides /
Author Sweeny, Keith H., ; Fischer, James R.
Other Authors
Author Title of a Work
Fischer, James R.,
Sweeny, Keith H.,
CORP Author Aerojet-General Corporation. Environmental Systems Division.
Publisher United States Environmental Protection Agency, Water Quality Office,
Year Published 1970
Report Number EPA 16040-ELO-06-70
OCLC Number 00146865
Subjects DDT (Insecticide) ; Insecticides--Biodegradation
Additional Subjects DDT (Insecticide) ; Insecticides--Biodegradation
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA 16040-ELO-06-70 Headquarters Library/Washington,DC 05/12/2014
EJBD  EPA 16040-ELO-06-70 c.1 Headquarters Library/Washington,DC 05/12/2014
ELBD RPS EPA 16040-ELO-06-70 repository copy AWBERC Library/Cincinnati,OH 06/26/2018
Collation iv, 128 pages : illustrations, figures, tables ; 28 cm.
"June 1970." U.S. Environmental Protection Agency Contract No. Contract Number: 14-12-596." Includes bibliographical references (pages 110-114).
Contents Notes
Laboratory studies demonstrated the feasibility of controlled destruction of chlorinated pesticides such as DDT. The concept comprised (1) means to degrade DDT to a harmless form, and (2) methods to delay the reaction for given pest-control action. Chemical methods for degrading DDT were screened and reduction was selected as the most promising technique. Destruction of DDT, without forming DDE as a product, was demonstrated in laboratory studies by mildly acidic reduction with zinc powder. The principal product is bis(p-chlorophenyl) ethane, DDT with all three aliphatic chlorines removed; a material stated to be "void of the neurotoxic effects of DDT." Catalysis of the reaction resulted in complete destruction of DDT in 1 hr at 25ÀC and conversion to bis(chlorophenyl) ethane in 4-8 hrs. Catalyzed aluminum or iron reduction of DDT produced tetra(p-chlorophenyl)tetrachlorobutane, reportedly lipoid insoluble. A 90% destruction of DDT in soil in 4 days was demonstrated in a laboratory test with spray-applied integral, catalyzed zinc-DDT particles (5-micron). Reaction delay can be achieved with wax or silicone coatings on the reductant which are slowly dissolved or eroded, or possibly slow air oxidation of sulfur. Coatings were produced which stopped zinc-acid reaction. A test of combined reductant - delayed action technique was made using silanized, catalyzed zinc (5 microns)-DDT particles sprayed onto soil. Although faulty coating prevented the desired delay, 95% decomposition of DDT was obtained. Effective reductive degradation of the chlorinated pesticides dieldrin, endrin, aldrin, chlordane, toxaphene, Kelthane, methoxychlor, Perthane and lindane, and selected polychlorinated biphenyls was shown. Degradation of DDT in water was demonstrated, a 421 mg/l DDT suspension being reduced to 1 ppm after 1 hr reaction at 75ÀC.