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| Type |
Poster Presentation |
| Area |
Analytical Chemistry |
| Room No. |
Exhibition Hall 2+3 |
| Time |
10월 19일 (목요일) 11:00~12:30 |
| Code |
ANAL.P-158 |
| Subject |
Decontamination of sulfur mustard in sand, concrete, and asphalt matrices |
| Authors |
Hyunsook Jung
CBR Division, Agency for Defense Development, Korea |
| Abstract |
The persistence of sulfur mustard is still a major challenge for decontamination, as it remains in the environment after longer intervals of time. Decontamination involves multiple mass transport mechanisms, such as diffusion and chemical interactions among a contaminant, a decontaminant, and material interfaces. The complex series of interacting processes can contribute to post-decontamination hazards, such as vapor emission and contact transfer to humans and the environment. The present work is concerened with the decontamination of sulfur mustard on sand, conrete, and asphalt. This array of matrices was chosen to represent complex surfaces commonly observed in an urban environment that would be expected to be easily targeted by terrorists or rogue organizations. The results show that the whole amount of the mustard agent was not decontaminated, and 2 ~ 3 % of the preliminary quantity remained after the decontamination process, which was emitted as vapor over time. Not only vapors of the residual agent but also its byproducts, including sulfoxide and sulfone compounds, were gradually emitted from the decontaminated surface over time. For such byproducts, the hypochlorite ion (-OCl), an active ingredient in the decontaminant used, reacts with sulfur mustard by oxidation to sulfoxide and/or sulfone and by dehydrochlorination to form such compounds as divinyl sulfone, which are reported to be relatively nontoxic. |
| E-mail |
junghs@add.re.kr |
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120th General Meeting of the KCS