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Investigation of means for controlled self-destruction of pesticides,

Author: Keith H Sweeny; James R Fischer; Aerojet-General Corporation. Environmental Systems Division.; United States. Environmental Protection Agency. Water Quality Office.
Publisher: Washington [Environmental Protection Agency, Water Quality Office]; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1970.
Series: Water pollution control research series.
Edition/Format:   Print book : EnglishView all editions and formats
Summary:
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  Read more...
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Additional Physical Format: Online version:
Aerojet-General Corporation. Environmental Systems Division.
Investigation of means for controlled self-destruction of pesticides.
Washington [Environmental Protection Agency, Water Quality Office]; for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1970
(OCoLC)596970707
Material Type: Internet resource
Document Type: Book, Internet Resource
All Authors / Contributors: Keith H Sweeny; James R Fischer; Aerojet-General Corporation. Environmental Systems Division.; United States. Environmental Protection Agency. Water Quality Office.
OCLC Number: 146865
Notes: "16040 ELO 06/70."
"Submitted in fulfillment of contract no. 14-12-596."
Description: iv, 128 pages illustrations 28 cm.
Series Title: Water pollution control research series.
Responsibility: by [Keith H. Sweeny and James R. Fischer], Aerojet-General Corporation, Environmental Systems Division, for the Water Quality Office, Environmental Protection Agency.

Abstract:

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 25°C 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 75°C.

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