Journal of the Korean GEO-environmental Society (한국지반환경공학회 논문집)

Korean Geo-Environmental Society (한국지반환경공학회)
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2, 4, 6-Trinitrotoluene(TNT) Treatment by the Alkaline Hydrolysis

가수분해에 의한 2, 4, 6-Trinitrotoluene(TNT) 처리

  • 권범근 (조선이공대학 생명환경화공과) ;
  • 김종오 (강릉원주대학교 공과대학 토목공학과)
  • Published : 2012.09.01
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Abstract

This study investigated the TNT decomposition by the treatment of alkaline hydrolysis. To obtain this objecitive, spectrum shift characteristics, pH effect, kinetics, and product analysis were examined during the alkaline hydrolysis by means of hydroxide ions. At pH = 12, an aqueous solution of TNT was changed into yellow-brown coloring, in which its absorbances were newly increased in a range of wavelength 400-600 nm. From the kinetic data, pseudo-first-order rate constant in a excess of hydroxide ion, in contrast to TNT concentration, was $0.0022min^{-1}$, which means that the reaction rate between TNT and hydroxide ion can be very slow, and that 1,047 min is necessary to achieve a 90% reduction of the initial TNT. In products analyses, nitrite ions and formic acid were mainly produced by the alkaline hydrolysis, nitrate ions and oxalic acid as minor products were generated.

본 연구에서는 염기성 수산화이온을 이용한 TNT의 분해 특성을 조사하였다. 이를 위해 TNT 처리 시 분광학적인 변화 특성을 관찰하고, pH 영향 및 반응생성물에 대해 정량적으로 조사하였다. 실험결과, pH=12에서 가수분해에 의해 TNT 수용액이 갈색을 띄는 파장 400-600nm 범위 내에서 흡광도가 증가함을 관찰하였다. 수용액 상의 pH=12에서 TNT 가수분해 시 pseudofirst-order 속도상수는 $0.0022min^{-1}$으로 나타났으며, 그 반응속도는 매우 느린 것으로 초기 TNT 농도인 $44{\mu}M$이 약 90% 정도 분해되려면 약 1,047min(17.44hrs)이 소요될 것으로 예상되었다. 반응 생성물로는 아질산이온과 포름산이 주로 생성되며, 기타 미량 성분으로 질산이온, 옥살산 등이 확인되었다.

Keywords

References

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