Destruction of VX by aqueous-phase oxidation using peroxydisulfate (direct chemical oxidation)

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Chemical warfare agents may be completely destroyed (converted to H{sub 2}O, CO{sub 2}, salts) by oxidation at 90--100 C using acidified ammonium peroxydisulfate, with recycle of NH{sub 4}SO{sub 4} byproduct. The process requires no toxic or expended catalysts and produces no secondary wastes other than the precipitated inorganic content of the agents. To determine oxidative capability of peroxydisulfate at low reductant contents, we measured rate data for oxidation of 20 diverse compounds with diverse functional groups; 4 of these have bonds similar to those found in VX, HD, and GB. On an equivalence basis, integral first-order rate constants for 100 ... continued below

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14 p.

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Cooper, J.F.; Krueger, R. & Farmer, J.C. October 11, 1995.

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Chemical warfare agents may be completely destroyed (converted to H{sub 2}O, CO{sub 2}, salts) by oxidation at 90--100 C using acidified ammonium peroxydisulfate, with recycle of NH{sub 4}SO{sub 4} byproduct. The process requires no toxic or expended catalysts and produces no secondary wastes other than the precipitated inorganic content of the agents. To determine oxidative capability of peroxydisulfate at low reductant contents, we measured rate data for oxidation of 20 diverse compounds with diverse functional groups; 4 of these have bonds similar to those found in VX, HD, and GB. On an equivalence basis, integral first-order rate constants for 100 C oxidation are 0.012{plus_minus}0.005 min{sup {minus}1} for di-isopropyl-methyl-phosphonate, methyl phosphonic acid, triethylamine, and 2,2{prime}-thiodiethanol at low initial concentrations of 50 ppM(as carbon) and pH 1.5. To provide scale-up equations for a bulk chemical agent destruction process, we measured time-dependent oxidation of bulk model chemicals at high concentrations (0.5 N) and developed and tested a quantitative model. A practical process for bulk VX destruction would begin with chemical detoxification by existing techniques (eg, hydrolysis or mild oxidation using oxone), followed by mineralization of the largely detoxified products by peroxydisulfate. Secondary wastes would be avoided by use of commercial electrolysis equipment to regenerate the oxidant. Reagent requirements, mass balance and scaleup parameters are given for VX destruction, using peroxydisulfate alone, or supplemented with hydrogen peroxide. For the use of 2.5 N peroxydisulfate as the oxidant, a 1 m{sup 3} digester will process about 200 kg (as C) per day. The process may be extended to total destruction of HD and hydrolysis products of G agents.

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14 p.

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OSTI as DE96008750

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  • Workshop on advances in alternative demilitarization technologies, Reston, VA (United States), 25-27 Sep 1995

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  • Other: DE96008750
  • Report No.: UCRL-JC--121999
  • Report No.: CONF-9509340--1
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 212671
  • Archival Resource Key: ark:/67531/metadc673189

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  • October 11, 1995

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 23, 2016, 4:06 p.m.

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Cooper, J.F.; Krueger, R. & Farmer, J.C. Destruction of VX by aqueous-phase oxidation using peroxydisulfate (direct chemical oxidation), article, October 11, 1995; California. (digital.library.unt.edu/ark:/67531/metadc673189/: accessed August 23, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.