Extraction and Quenching Procedures for HD and VX on Concrete and Asphalt Substrates

Abstract

Analysis of decontaminant efficacy on concrete and asphalt requires the ability to quench any residual decontaminant and efficiently extract chemical warfare agents from these substrates. Using thin (0.25 in. or smaller) coupons of calcium sulfoaluminate (CSA) concrete and asphalt roofing shingles, extraction methods were developed. On concrete surfaces, chloroform and isopropanol gave reasonable extraction efficiencies after 24 h for HD and VX, respectively. Asphalt could be extracted over 3 h using chloroform/acetone mixtures (HD) and isopropanol:acetone mixtures (VX). Some decontaminants were found to self-quench over the course of the 4 h residence time. Some oxidative decontaminants required a quench using sodium thiosulfate (VX) or tetrahydrothiphene (HD).

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 2020
Accession Number
AD1105839

Entities

People

  • Neil A. Hawbaker

Tags

Communities of Interest

  • Counter WMD

DTIC Thesaurus Topics

  • Acetic Acid
  • Acetonitrile
  • Chemical Warfare
  • Chemical Warfare Agents
  • Chemical Weapons
  • Chloroform
  • Concrete
  • Efficiency
  • Extraction
  • Materials
  • Nitriles
  • Organic Solvents
  • Quenching
  • Reactivities
  • Substrates
  • Tars
  • Warfare

Readers

  • Analytical Chemistry
  • Environmental Engineering.
  • Pavement Materials Engineering.