Accession Number:

ADA455089

Title:

Investigation of Alum Mixtures for the Removal and Decontamination V And G Type Chemical Warfare Agents from Aqueous Solutions

Descriptive Note:

Conference paper

Corporate Author:

EDGEWOOD CHEMICAL BIOLOGICAL CENTER ABERDEEN PROVING GROUND MD

Report Date:

2003-11-19

Pagination or Media Count:

8.0

Abstract:

Truly environmentally friendly means of detoxifying chemical warfare agents have yet to be developed. Toward this end, Soman GD, VX and agent simulants were treated with aqueous aluminum sulfate alum, sodium aluminate, or mixtures of the two. The mixtures were prepared by combining varying volumes of the aqueous salts to give buffered solutions pH 2-12. Reactions were tracked using phosphorus-31 nuclear magnetic resonance NMR and gas chromatographymass spectrometry GCMS. Simulants studied were triethylphosphate TEP, tributylphosphate TBP, diisopropylphosphorofluoridate DPF, O,O-dimethylmethyl phosphonate DMMP, and malathion. Saturated alum alone removed approximately 10, 20, and 94 of DMMP, TBP, and TEP, respectively, upon immediate mixing. The buffered alum solutions formed a flocculent aluminum hydroxide precipitate upon reaction, which was effective to varying degrees in removing or chemically altering simulants depending on pH. A basic buffer at pH 12.3 and an acidic buffer at pH 3.8 were used for most of the studies. Malathion was decomposed within 4 days by the basic buffer, but remained unreacted in the acidic buffer. VX was unaffected by the acidic buffer. GD was eliminated from the aqueous acidic buffer within 18 hours, with nearly 60 removed within the first 10 minutes. GCMS confirmed that, after 24 hours, a chloroform extract of the precipitate formed by this GD reaction contained less than 4 of the original GD. Studies are continuing, but it appears that alum buffers may provide an effective alternate method for the destruction of G type nerve agents.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry
  • Chemical, Biological and Radiological Warfare

Distribution Statement:

APPROVED FOR PUBLIC RELEASE